What Delaware Sellers Must Disclose: The Seller’s Property Condition Report, Radon, Lead Paint, and the Defects You Can’t Stay Quiet About

Selling a Delaware home involves more than answering a few questions about whether the roof leaks or the basement gets wet. 

Delaware seller disclosure requirements impose specific written disclosure duties on many sellers of residential real estate, and Delaware uses a state-approved Seller’s Disclosure of Real Property Condition Report to document much of that information.

For covered transactions, Delaware law generally requires a seller to disclose known material defects in writing. The condition report must ordinarily reach a prospective buyer before that buyer makes an offer, and material changes occurring before final settlement must be addressed through updated disclosure. 

The report is based on the seller’s knowledge; it is not a guarantee that the property has no undiscovered problems and is not a replacement for inspections.

There are important exceptions. Certain court-ordered, fiduciary, foreclosure-related, co-owner, family, divorce-related, and government transfers are excluded by statute. New construction, however, should not simply be treated as exempt: Delaware has a separate condition-report form for some new construction situations.

Radon creates an additional Delaware disclosure requirement, while most pre-1978 homes are also subject to separate federal lead-based paint disclosure rules. And labeling a transaction “as-is,” accepting cash, or selling to an investor does not itself create an exemption under Delaware’s disclosure statute.

What Are Delaware Seller Disclosure Requirements?

Delaware’s principal residential seller-disclosure framework appears in the Buyer Property Protection Act, Subchapter VII of Chapter 25, Title 6 of the Delaware Code. The statute defines “residential real property” for these purposes as an interest in a manufactured-housing lot or real property improved by dwelling units for one to four families. 

Delaware’s principal residential seller-disclosure framework is the Delaware Buyer Property Protection Act, found in Subchapter VII of Chapter 25, Title 6 of the Delaware Code. It defines covered residential real property and establishes rules concerning known material defects, delivery of the disclosure, radon, covered transactions, and statutory exemptions.

It also extends the subchapter to specified types of transactions, including sales, exchanges, installment land-sale contracts, leases with options to purchase, and certain ground leases.

The central disclosure rule is found in 6 Del. C. §2572. Except for statutory exemptions, a seller transferring covered residential property must disclose in writing the material defects known to the seller when the property is offered for sale or that become known before final settlement. The statute also requires updating for material changes occurring before settlement.

That wording matters in several ways.

First, the duty centers on what is known. Delaware’s current state form repeatedly instructs sellers to answer based on their knowledge of the property, and the form specifically permits “U” for unknown and “NA” where a question is not applicable. 

The law therefore should not be converted into an assumption that every homeowner must become an engineer, environmental consultant, surveyor, or building-code expert before selling.

Second, disclosure is not the same thing as a warranty. Section 2574 states that the completed condition report represents a good-faith disclosure effort and does not replace inspections or warranties that a buyer or seller may choose to obtain.

Third, the state-approved form is extensive. It does not ask only whether the seller knows of one broadly defined “material defect.” It asks detailed questions about the property, its use, structural history, water problems, environmental concerns, boundaries, associations, systems, repairs, permits, and other conditions.

As of September 2026, the Delaware Division of Professional Regulation is publishing a current Seller’s Disclosure of Real Property Condition Report with an effective date of August 1, 2026. Sellers and agents should use the current version rather than relying on a saved copy from an older transaction.

Delaware Seller Disclosure Requirement Overview

Transaction Type	Disclosure Form Generally Required?	Key Caveat
Conventional sale of an existing 1–4 family dwelling	Yes	Subject to the statutory exemptions in §2577
Cash sale	Generally yes	Payment method is not itself an exemption
Sale to an investor	Generally yes	Buyer identity is not itself an exemption
“As-is” transaction	Generally yes	Contract wording does not itself remove the statute
Installment land-sale contract	Covered	§2576 expressly includes this transaction type
Lease with an option to purchase	Covered	§2576 expressly includes it
Certain new construction	Disclosure still addressed	A separate new-construction condition report may apply
Transfer by qualifying fiduciary during estate, guardianship, or trust administration	Exempt under §2577	The transfer must actually fit the statutory category
Sheriff’s sale following default	Exempt under §2577	Other federal or transactional duties may differ
Court-ordered transfer	Exempt under §2577	Scope depends on the nature of the court-ordered transfer
Transfer between qualifying co-owners	Exempt under §2577	Applies only within the statutory wording
Certain transfers between spouses or qualifying family members	Exempt under §2577	Do not assume every family transaction qualifies
Transfer to or from a government entity	Exempt under §2577	Separate laws or transaction documents may still apply

Who Must Complete the Seller’s Disclosure of Real Property Condition Report?

Delaware’s statutory definition of “seller” is broad. It includes an individual, partnership, corporation, or trustee transferring residential real property. That means the disclosure analysis does not depend solely on whether the seller is a typical owner-occupant.

A landlord selling a rental house, for example, can still be within the disclosure framework. So can an entity-owned residential property. 

Rental-property sellers also have transaction issues beyond the condition report, including existing leases, tenant occupancy, showing access, repair records, security deposits, and the information an investor buyer may request. 

Landlords preparing to sell can review how to sell a rental property with tenants for the broader occupied-sale process. For Delaware disclosure purposes, however, the fact that a property is rented does not by itself eliminate an otherwise applicable seller disclosure requirement.

The current report specifically asks how the property is used—such as a primary residence, second or vacation home, rental property, inherited property, or another use—and asks how long it has been since the seller occupied the home if it is not the seller’s primary residence.

That occupancy question reinforces an important distinction: limited knowledge is not the same as an exemption.

A seller who inherited a house and never lived in it may legitimately know less about day-to-day conditions than a seller who lived there for 25 years. But simply checking “Inherited Property” does not create an exemption from the Buyer Property Protection Act.

The separate statutory exemption applies to, among other things, a transfer by a fiduciary in the course of administration of a decedent’s estate, guardianship, or trust. 

Once property has passed to an heir personally and that heir later sells it in an ordinary transaction, sellers should not assume that the fiduciary exemption still applies. The ownership and transaction structure need to be evaluated against §2577.

The seller property condition report Delaware currently uses also makes clear that it is the seller who answers the questions based on the seller’s knowledge. 

An agent can explain the transaction process and provide the required form, but an agent generally should not invent factual answers about whether a homeowner experienced basement seepage, repaired a leak, had termite treatment, or received a notice from a government agency.

Delaware Real Estate Commission rules separately require licensees handling covered transactions to obtain the condition report from the seller before accepting a written listing agreement and to give the seller’s most recent report to the buyer before the buyer enters the agreement of sale.

Which Delaware Sales May Be Exempt?

Delaware does not use a vague “special circumstances” exemption. Section 2577 identifies specific categories of transfers to which the Buyer Property Protection Act does not apply.

Sellers should compare their transaction carefully with that list rather than assuming that a distressed sale, family relationship, estate connection, or unusual financing structure is enough.

Current statutory exemptions include:

• transfers pursuant to certain court orders, including specified estate, trust, guardianship, bankruptcy, receivership, eminent-domain, execution, and specific-performance situations;
• a deed in lieu of foreclosure from a mortgagor in default to a mortgagee;
• sheriff’s sales arising from default on obligations secured by mortgages, judgments, taxes, or other liens;
• transfers by a fiduciary in the course of administering a decedent’s estate, guardianship, or trust;
• transfers from one co-owner to one or more other co-owners;
• transfers to a spouse or certain people within the transferor’s lineal line of consanguinity;
• transfers between spouses resulting from a property settlement incident to divorce; and
• transfers to or from a government entity.

The statute also still contains an exemption referring to transfers governed by the former Delaware Out-of-State Land Sales and Promotions Act when the relevant property disclosure report is supplied, although the Code marks that underlying Act as repealed. 

That unusual provision is one reason sellers dealing with atypical transactions should rely on current legal guidance rather than summaries written years ago.

The Delaware Real Estate Commission provides a separate Real Property Condition Report and Radon Disclosure – Exempt Property Certification for transactions that qualify.

What about newly constructed homes?

New construction should not be added to the exemption table as though all builders are outside the disclosure system.

Commission rules state that a residential property offered for sale before a certificate of occupancy has been issued uses the Commission-approved New Construction Condition Report in place of the standard condition report. 

If the certificate of occupancy is obtained before the agreement of sale, the licensee must obtain the standard report from the seller and provide it to the prospective buyer.

What about an inherited property?

“Inherited” is a description of how ownership was obtained, not a blanket statutory exemption.

A personal representative, trustee, or other fiduciary making a qualifying transfer during estate or trust administration may fit §2577(5). An heir who has already received title and is now making an ordinary resale may be in a different legal position.

What about foreclosure property?

Section 2577 expressly excludes a deed in lieu of foreclosure in the specified circumstances and a qualifying sheriff’s sale. A later resale by a bank, investor, or individual who acquired the property through foreclosure should not automatically be assumed to carry the same exemption. The exemption applies to the transfer described by the statute, not indefinitely to the property itself.

When Must the Seller Disclosure Be Delivered?

Timing is one of the most consequential parts of Delaware’s framework.

Section 2573 says the Seller’s Disclosure of Real Property Condition Report must be given to prospective buyers—or the prospective buyer’s agent—before the buyer makes an offer to purchase. Once signed by buyer and seller, the disclosure becomes part of the purchase agreement.

Section 2572 also states that the disclosure is to be made in writing before the seller signs the listing agreement and requires updates when necessary for material changes occurring before final settlement. 

Delaware Real Estate Commission rules put corresponding duties on licensees: the licensee must obtain the Condition Report before accepting the written listing and give the most recent report to the buyer before the buyer enters into an agreement of sale.

This creates several practical checkpoints:

1. Before listing: the covered seller completes the current disclosure.
2. Before an offer: a prospective buyer receives the report.
3. During the contract period: newly occurring material changes should be evaluated for an update.
4. Before final settlement: information newly known to the seller cannot simply be ignored because an earlier disclosure was already signed.

For example, suppose the seller truthfully reports no known active roof leakage. Two weeks before settlement, a major storm causes water to enter through the roof and stain a bedroom ceiling. The original answer does not provide a license to stay silent. Delaware law expressly addresses material changes occurring before settlement.

The statute is supplemented by the Delaware Real Estate Commission’s rules for the Condition Report. Commission Rule 10.7 requires licensees to obtain the seller-completed report before accepting a written listing agreement and to provide the seller’s most recent report to the buyer before the buyer enters an agreement of sale. The rule also requires the report to become part of the agreement of sale.

Does late delivery automatically let the buyer cancel?

Sellers should be cautious about broad claims on this point.

The portions of the current Buyer Property Protection Act governing the report establish the disclosure timing and identify certain situations in which a buyer does not have a cause of action, including disclosed defects and defects occurring after final settlement. They do not state a universal, standalone cancellation period for every late-delivered condition report.

Whether a late or missing disclosure affects enforceability, termination rights, contractual contingencies, damages, or another remedy can therefore depend on the agreement and the particular facts. That is an issue for transaction-specific legal advice rather than an automatic “buyer gets X days to cancel” rule.

How to Complete the Delaware Seller Property Condition Report

Delaware’s current report is detailed. The August 1, 2026 version spans 11 pages and begins by instructing the seller to answer based on the seller’s knowledge. It allows “U” for unknown and “NA” for not applicable and directs sellers to provide further explanations where required.

That creates a useful operating rule:

Know it → disclose it accurately.
Don’t know it → don’t guess.
Need interpretation → ask a Delaware real-estate attorney or licensed professional.

Do not copy answers from an old listing. Do not assume that a repaired defect automatically disappears from the history the new form asks about. And do not convert uncertainty into a confident “No.”

Major Sections of the Current Seller Condition Report

Form Category	What Seller Should Review	Records That May Help
Occupancy and property use	Residence, rental, inherited property, leases, occupancy history	Leases, management agreements, certificates of occupancy
Associations and restrictions	HOA/condo obligations, assessments, deed restrictions	HOA notices, budgets, association correspondence
Title and zoning	Easements, ground leases, zoning issues, liens or assistance programs	Deed, survey, title documents, municipal correspondence
Government/legal matters	Notices, violations, litigation or required corrections	Agency letters, violation notices, court documents
Environmental concerns	Tanks, asbestos, lead, hazardous-substance testing, mold testing	Test reports, remediation records
Land and drainage	Flooding, wetlands, standing water, boundaries, encroachments	Surveys, flood documents, insurance records
Structural condition	Additions, permits, foundation movement, damage and repairs	Permits, engineering reports, repair invoices
Termites/pests	Infestations, treatment and damage	Pest reports and warranties
Basement/crawlspace	Water, dampness, sump system, foundation cracks	Waterproofing invoices, drainage records
Roof	Roof age, leaks, defects and repair history	Roofing invoices and warranties
Mechanical systems	Plumbing, electrical, HVAC and related conditions	Service records, permits and warranties

Property and Ownership Information

The beginning of the current form goes beyond the seller’s name and address. It asks how the property is used, whether it is rented or subject to other contractual rights, whether rental permits or licenses have been obtained where applicable, and whether management agreements could affect the purchaser.

The form then explores association and title matters, including deed restrictions, association fees and assessments, easements, shared maintenance arrangements, zoning or setback concerns, and certain financing-assistance or forbearance issues.

A seller who is uncertain whether an old fence actually crosses the boundary should not write a definitive legal conclusion merely because a neighbor once complained about it. If a survey exists, review it. If there is a written boundary dispute, that is different from speculation.

Similarly, an owner who has never researched whether an easement shown in the deed remains legally effective should not attempt to interpret title law on the disclosure. The safer distinction is between facts the seller knows—such as a recorded driveway-sharing agreement in the seller’s possession—and legal conclusions that require professional interpretation.

Structural, Foundation, Roof, and Water Problems

The structural portions deserve especially careful attention because the current report does not restrict itself to conditions that are actively occurring on the day the form is signed.

For example, it asks whether there is now or has ever been movement, shifting, or other problems involving walls or foundations. It asks about non-plumbing water leakage, problems with walls, floors, windows and exterior components, and repairs or attempts to control those problems. 

The basement and crawlspace section similarly asks about current or past water leakage, accumulation, or dampness, along with repairs or control efforts.

This makes the distinction between “fixed” and “never happened” particularly important.

A repaired foundation crack may no longer be an active defect, but that does not mean the seller should answer a historical question as though the condition never existed. The appropriate answer depends on exactly what the current question asks and what the seller knows about the history.

Roof history should receive the same treatment. Gather invoices showing when roof surfaces were installed, prior leak repairs, flashing work, chimney repairs, or related interior restoration. An invoice can help the seller report what happened without trying to diagnose a roof’s remaining useful life.

Homeowners often make repairs or improvements before listing, but completing work does not automatically erase the property’s prior condition from disclosure questions that ask about historical problems. If you are deciding which projects to address before putting the property on the market, see the best home improvements to make before selling. 

Keep invoices, permits, warranties, and contractor records for work connected to previous leaks, electrical issues, roofing, drainage, or other conditions because those documents can help distinguish the original problem from the repair that followed.

Plumbing, Electrical, HVAC, and Mechanical Systems

Mechanical-system questions should be answered from actual knowledge rather than from assumptions based on age.

A seller may know that the furnace was replaced in 2022 because the invoice is available. That does not make the seller qualified to certify that every component is currently functioning to manufacturer specifications. 

Conversely, a seller who knows the air-conditioning compressor repeatedly trips a breaker should not use “No known problems” merely because the system managed to run during the last showing.

Review:

• HVAC installation and service records;
• electrical upgrades and permits;
• plumbing repairs;
• sewer or septic records;
• water-heater replacement documents;
• private well or water-system testing where applicable;
• appliance or mechanical-system warranties that are relevant to form questions.

Where the form asks whether modifications or upgrades occurred, disclose the known work accurately. If the seller genuinely does not know whether a previous owner pulled a permit for a decades-old addition, do not invent an answer. Check available records when practical, and seek professional guidance if the legal significance matters.

Environmental Hazards, Mold, Pests, and Drainage

The current form contains a dedicated environmental-concerns section. Among other subjects, it asks about underground storage tanks, asbestos-containing materials, lead hazards, testing for toxic or hazardous substances, mold testing, and certain other environmental conditions. It also contains extensive land, soils, drainage, flood and boundary questions.

Notice the difference between:

• knowing that a mold test was performed;
• having the test report;
• observing staining or moisture;
• knowing a professional diagnosed mold;
• and personally deciding that discoloration “must be toxic mold.”

Those statements are not interchangeable.

If you have a mold test, describe and preserve the actual test rather than substituting your own diagnosis. If a basement becomes damp after unusually heavy rain, describe the known event accurately rather than converting it into either “the basement floods” or “the basement is perfectly dry.”

The same principle applies to pests. The current report asks about current and historical termite or wood-destroying-insect infestation, damage, inspections, treatments, other insect issues, and certain wildlife conditions.

A termite treatment five years ago is not necessarily evidence of a current infestation. But when the form asks whether treatment ever occurred, a completed treatment is still responsive.

Additions, Permits, Easements, and Other Property Issues

Renovations create another area where overconfidence causes problems.

The current report asks about additions or structural changes and whether necessary permits and approvals were obtained. It also asks whether permits were closed.

A homeowner who personally hired a contractor to construct a deck generally has more knowledge about the permitting process than an heir selling a home built out by a previous owner decades ago. Their answers may therefore legitimately differ.

Do not make statements such as “all work was permitted” unless you know that to be true. If you possess permits, approvals, final inspection documents, contractor invoices, architectural plans, or municipal correspondence, review them before completing the report.

Likewise, easements and shared systems may not be physical “defects,” but they can still be specifically responsive to the form. The current report asks about rights-of-way, easements and shared maintenance arrangements.

How to Answer Disclosure Questions Accurately Without Guessing

Accurate disclosure does not mean writing every thought you have ever had about the property. It means answering the actual questions truthfully, disclosing known material information required by law, and avoiding unsupported technical conclusions.

Example 1: An Old Roof Leak

Suppose a bedroom ceiling leaked during a storm three years ago. A roofer replaced flashing, the interior was repaired, and no water has appeared since.

Avoid thinking: “It was repaired, so the answer is no.”

Instead, read the current wording carefully. If the form asks whether leakage has ever occurred or whether repairs were made to address a prior problem, the historical event is responsive. The seller might accurately identify the approximate date, location, known repair, and available invoice without promising that the entire roofing system has no defect.

That is disclosure of known history, not a warranty.

Example 2: Basement Moisture

Suppose small amounts of water entered the unfinished basement twice during unusually heavy rain, after which the seller added downspout extensions.

The statement “never had water in the basement” would conflict with the seller’s actual knowledge. A more accurate disclosure explains what occurred and what was done afterward.

If the seller does not know whether the source was groundwater, grading, a wall crack, or another cause, the seller should not manufacture a diagnosis.

Example 3: Possible Foundation Condition

Suppose a seller sees a crack in a foundation wall but has never been told by an engineer that the foundation is structurally defective.

There is a difference between saying:

• “There is a visible crack on the west basement wall,” and
• “The foundation is failing.”

The first can be a factual observation. The second may be a technical conclusion requiring expertise.

Where a report asks about cracks, movement, shifting or foundation problems, answer the actual question from what you know. If the meaning or seriousness of the condition cannot be determined without expertise, a structural engineer, contractor, inspector, or Delaware attorney may be appropriate depending on the issue.

A seller disclosure and a buyer’s home inspection serve different purposes. The disclosure records information the seller actually knows, while an inspector independently evaluates visible components and major systems within the scope of the inspection. 

Sellers who want to understand what buyers may examine after an offer can review how home inspections work and what inspectors typically evaluate. An inspection can uncover a condition the seller genuinely did not know about, which is another reason the Delaware disclosure report should not be treated as a guarantee that the property is defect-free.

What Counts as a Material Defect?

The phrase material defect disclosure can be misleading when treated as though Delaware has created a simple universal checklist of “material” and “not material” conditions.

Section 2572 requires disclosure of known material defects, but the Buyer Property Protection Act does not provide a single exhaustive definition of “material defect” in the definitions section. 

Sellers therefore should not invent a bright-line test that every crack, stain, damaged screen or worn component automatically qualifies—or that anything absent from a seller’s personal list can safely be ignored.

In real-estate disputes, materiality can involve whether a known condition meaningfully affected the property, its use, value, safety, or a purchaser’s decision. But the precise legal significance is fact-sensitive.

There is also a second layer: the state form asks specific questions.

That means a seller cannot necessarily reason, “I personally do not think that event was material, so I will answer ‘No.’” If the current form expressly asks whether the basement has ever experienced leakage or whether termite treatment occurred, answer that question truthfully even if the seller believes the issue is no longer important.

Delaware courts have emphasized the seller’s knowledge in actual disclosure disputes. In one Delaware decision, the court rejected nondisclosure theories involving certain code, electrical and plumbing conditions because the evidence did not show the homeowners knew those conditions were defective.

The point is not that unknown defects can never matter in any other legal context. It is that Delaware’s statutory seller-disclosure obligation is expressly tied to defects known to the seller.

Active concealment is different. Painting over staining solely to hide evidence from a buyer, removing documents because they reveal a known problem, or giving a knowingly false answer may create significantly different legal issues from an honest lack of knowledge.

Radon Disclosure Requirements in Delaware

Radon disclosure Delaware involves a specific statute and a separate disclosure process.

Under 6 Del. C. §2572A, for non-exempt transfers of residential real property with a dwelling, the buyer must be notified that the property may present potential exposure to radon. The seller must provide the buyer with information from radon tests or inspections in the seller’s possession and disclose known radon hazards.

The Delaware Real Estate Commission’s radon form asks the seller whether the seller is aware of radon at the property, whether testing or inspection has been performed, whether reports in the seller’s possession have been provided, and which reports are involved. The buyer acknowledges receipt of Delaware’s radon information and the opportunity to test.

Delaware’s Division of Public Health explains that radon is an invisible, odorless radioactive gas and that concentrations can vary significantly from one house to another. Its current public guidance recommends testing rather than assuming radon risk from age, appearance, or neighborhood alone.

Do Delaware Sellers Have to Test for Radon?

The disclosure statute reviewed for this article does not impose a universal requirement that every seller conduct a new radon test before selling.

Instead, §2572A requires disclosure of known hazards and information from tests or inspections in the seller’s possession, while the buyer is informed of the option to test. Delaware’s official buyer publication likewise explains that a purchaser may arrange radon testing before settlement, commonly through a contractual contingency.

That distinction matters.

A seller who has never tested should not invent a radon result. A seller who tested five years ago and still has the report should not behave as though no test occurred merely because the seller considers it old. The law specifically addresses information from tests or inspections in the seller’s possession.

Delaware public-health guidance reports that elevated radon can occur in homes across the state, with geographical variation in prevalence. That does not establish whether any particular property has elevated radon. Testing is how an individual building is evaluated.

What to Do With Prior Radon Test or Mitigation Records

Keep the records.

Useful documents may include:

• original radon test reports;
• follow-up or long-term test results;
• invoices from mitigation contractors;
• diagrams or specifications for a mitigation system;
• fan replacement records;
• post-mitigation test results;
• warranties or service documentation.

If a mitigation system is present, disclose information that is responsive to the applicable forms and provide required records in your possession. Avoid statements such as “the house is radon-free.” Radon concentration is measured, conditions may change, and Delaware encourages testing.

Radon vs. Lead-Paint Disclosure

Issue	Delaware/Federal Rule	Seller Action
Radon	Delaware §2572A	Disclose known hazards and provide radon test/inspection information in seller’s possession
New radon test by seller	Not universally required by §2572A	Do not invent a test requirement; buyer may choose to test
Radon buyer notice	Delaware-specific	Buyer receives radon information and acknowledges testing option
Lead-based paint in most pre-1978 housing	Federal disclosure rule	Disclose known lead information and hazards
Existing lead records	Federal	Provide available records/reports
Lead pamphlet	Federal	Provide approved EPA information
Lead inspection opportunity	Federal	Buyer generally receives a 10-day opportunity unless changed or waived as permitted
Seller must conduct lead inspection	Generally no	The disclosure rule focuses on known information and records

Federal Lead-Based Paint Disclosure for Pre-1978 Homes

The lead paint disclosure home sale requirement comes primarily from federal law rather than Delaware’s Buyer Property Protection Act.

EPA explains that, before a buyer becomes obligated under a contract for most housing built before 1978, the Lead-Based Paint Disclosure Rule requires sellers and relevant real-estate professionals to disclose known information about lead-based paint and lead-based paint hazards and provide available reports and records. 

Buyers must also receive the approved Protect Your Family From Lead in Your Home pamphlet and the transaction documentation must contain the required federal Lead Warning Statement and acknowledgements.

For a sale, federal rules generally give the buyer a 10-day opportunity to conduct a lead-based-paint inspection or risk assessment. The parties may agree in writing to a different period, and the buyer may waive the opportunity in accordance with the rule.

The federal disclosure requirement is separate from Delaware’s state condition report even though Delaware’s current form itself asks about known lead hazards.

That means a seller of a 1955 home should not assume that checking an environmental question on the Delaware form substitutes for federal compliance.

For most covered pre-1978 housing, think in separate layers:

1. complete the Delaware property-condition disclosure when required;
2. identify known lead-based paint or lead hazards;
3. provide available reports and records;
4. give the federal lead-hazard pamphlet;
5. use the required contract disclosure language and certifications;
6. provide the buyer’s inspection/risk-assessment opportunity.

EPA also makes an important distinction: the disclosure rule does not generally require the seller to commission a new lead inspection. It requires disclosure of known information and available records.

Some housing is exempt from the federal rule, including housing built after 1977 and certain other categories identified by EPA, such as some zero-bedroom units and housing certified lead-free. 

Foreclosure sales are also included on EPA’s federal exemption list. Sellers dealing with a possible federal exemption should verify that category rather than relying only on the construction date.

How As-Is and Investor Sales Affect Disclosure Duties

An as-is clause ordinarily addresses the condition in which the purchaser agrees to accept property and can affect repair negotiations, inspection remedies, warranties, or other contractual rights.

It does not rewrite §2577.

Delaware’s list of statutory exemptions does not contain categories called “cash buyer,” “investor purchaser,” or “as-is sale.” Accordingly, sellers should not assume that the Seller’s Disclosure of Real Property Condition Report can be skipped merely because the buyer does not want repairs or is buying without financing.

Sale Type	Disclosure Duty Automatically Waived?	Important Consideration
Traditional financed sale	No	Apply normal state and federal requirements
As-is sale	No	Contract terms and statutory duties are separate issues
Cash sale	No	Cash payment does not appear among §2577 exemptions
Investor purchase	No	Investor status does not appear among §2577 exemptions
Fiduciary transfer fitting §2577	Statutory exemption may apply	Verify the exact transfer category
Sheriff’s sale fitting §2577	Statutory exemption applies	Do not assume a later resale remains exempt

An as-is provision may mean the seller will not make requested repairs after an inspection. That is not the same as permission to knowingly answer a disclosure question falsely or conceal a fact the law requires to be disclosed.

Similarly, a professional investor may intentionally purchase a property with roof problems, water damage, fire damage, or substantial deferred maintenance. The buyer’s willingness to accept those conditions does not transform an otherwise covered transaction into an exemption.

Where a statutory exemption does apply, use the state’s exempt-property process rather than improvising your own waiver.

What Happens if a Buyer Claims You Hid a Defect After Closing?

A buyer discovering a problem after closing does not automatically have a successful claim against the seller.

A roof can fail after settlement. A pipe can burst unexpectedly. An inspector can overlook something the seller also genuinely did not know about. 

Section 2575 expressly provides that a buyer has no cause of action against the seller, agent or subagent for certain categories, including material defects disclosed before the offer, qualifying defects developed after the offer and disclosed before settlement, and defects occurring after final settlement.

Claims involving alleged nondisclosure usually become much more fact-specific.

Relevant questions may include:

• Did the condition exist before settlement?
• Did the seller know about it?
• Was it material?
• What exactly did the state report ask?
• How did the seller answer?
• Was the condition disclosed elsewhere in writing?
• Did the buyer’s inspection identify it?
• Were repair invoices or reports provided?
• Did the seller make a repair but omit the history?
• Did anything materially change before settlement?
• What representations appear in the purchase agreement?
• Is there evidence of concealment or intentional misrepresentation?

Delaware courts have treated the signed Seller’s Disclosure as part of the contract because §2573 says the signed disclosure becomes part of the purchase agreement. Delaware decisions have therefore allowed claims based on allegedly false or incomplete disclosures to be analyzed through contractual theories in appropriate circumstances.

Depending on the facts, pleadings and contract, a buyer may assert theories such as breach of contract, misrepresentation, fraud or fraudulent concealment. But the name of a claim is not proof of liability. Knowledge, materiality, reliance, causation, damages, inspection evidence, contractual language and other elements can matter.

A Delaware decision concerning allegedly undisclosed residential defects illustrates the significance of knowledge: the court declined to impose disclosure liability for certain conditions when the evidence did not establish that the homeowners knew those conditions were defects.

Conversely, evidence that a seller knew about a condition and intentionally attempted to keep the buyer from discovering it can create a substantially different case.

Potential relief in a successful dispute can vary depending on the legal theory, contract, proof, and procedural posture. 

Damages may be sought in some cases; rescission or other equitable relief may be requested where legally available; fee recovery depends on applicable law, contractual provisions, or other authority. Sellers should not assume that every nondisclosure produces the same remedy.

Records Delaware Sellers Should Keep

Disclosure quality improves when sellers document facts rather than relying entirely on memory.

Before listing, gather records such as:

• inspection reports;
• structural or engineering reports;
• roofing invoices;
• waterproofing records;
• pest inspections and treatment warranties;
• plumbing, HVAC and electrical invoices;
• mold, water-quality or environmental reports;
• radon test results and mitigation documentation;
• lead reports;
• building permits and certificates;
• surveys;
• flood-insurance and relevant claim records;
• association notices and special-assessment information;
• notices from municipalities or government agencies;
• written warranty documents;
• disclosure forms and any later updates.

Do not destroy an old inspection simply because it contains inconvenient information. Destroying documents does not change what the seller already knows, and deliberate concealment can turn an ordinary condition dispute into a much more serious credibility problem.

Keep the final signed condition report, radon documentation, federal lead disclosure if applicable, amendments or updates, and supporting records provided during the transaction.

Delaware’s disclosure statute reviewed here does not establish a universal record-retention period telling every seller exactly how many years to keep this complete file. Sellers who need a retention period for a particular transaction should obtain advice based on their contract and potential legal or tax requirements.

Common Disclosure Mistakes Sellers Should Avoid

The most common errors are not necessarily complicated legal mistakes. Many arise from treating the form as a marketing document instead of a factual disclosure record.

Common Seller Mistakes

Mistake	Potential Problem	Better Practice
Checking “No” when the seller is uncertain	Creates a factual assertion the seller may not be able to support	Use the form’s “Unknown” option when genuinely appropriate
Omitting old basement seepage	Current form asks historical water questions	State known history and repairs accurately
Treating repaired conditions as though they never occurred	Some questions expressly ask about past problems or repairs	Read the time period in each question
Assuming “as-is” eliminates disclosures	§2577 does not list as-is sales as exempt	Analyze disclosures separately from repair obligations
Ignoring an old radon report	§2572A addresses reports in the seller’s possession	Preserve and provide required radon information
Missing federal lead disclosure	Separate federal obligations can apply to most pre-1978 housing	Use a distinct lead-compliance checklist
Failing to update after a material change	§2572 requires updates for material changes before settlement	Document new information promptly
Guessing about permits	An incorrect confident answer may be worse than acknowledged uncertainty	Review available records or seek professional help
Diagnosing structural problems personally	Seller may lack technical expertise	Report known facts and professional findings
Covering evidence of a condition to prevent discovery	May support allegations of intentional concealment	Correct or disclose without deceptive concealment
Throwing away inspection or repair reports	Removes evidence that could clarify history	Preserve relevant records
Having the agent invent seller facts	Agent may not know the property history	Seller answers knowledge-based questions

The “No” Versus “Unknown” Problem

The current form specifically allows “U” where information is unknown.

That does not mean “Unknown” should become a strategy for avoiding facts a seller actually knows. But it does mean a genuine lack of knowledge should not automatically be converted into a false “No.”

For example:

• “No, there has never been a septic repair” means the seller is affirmatively saying none occurred within the scope of the question.
• “Unknown” means the seller genuinely does not know.

Those are materially different statements.

Forgetting Historical Water Problems

Water issues are among the easiest disclosures to accidentally understate because homeowners often think only about current conditions.

The Delaware report asks questions framed in terms of both present and past leakage or dampness. If a crawlspace routinely became damp before a drainage repair, the seller should read those historical questions carefully rather than answering based only on the dry condition observed today.

Assuming Repairs Erase History

A successful repair is useful information. It is not a time machine.

If the form asks whether there has ever been a problem, disclose the problem and the known repair. An invoice stating that flashing was replaced in May 2024 is better than an unsupported statement that the roof is now “guaranteed leak-free.”

Relying Too Heavily on an Agent

A licensed agent has important transaction responsibilities, including providing the disclosure documents at the appropriate stage. But the seller remains the source of many property-history facts.

If an agent asks, “Did this basement ever take on water?” the homeowner who remembers two past seepage events should not respond, “Just mark whatever is normal.”

Delaware Home Seller Disclosure Checklist

A disciplined workflow helps keep state, radon and federal requirements from becoming mixed together.

Pre-Closing Disclosure Checklist

Task	When to Handle It	Record to Keep
Obtain the current Delaware condition report	Before listing	Current blank and completed form
Determine whether §2577 exemption applies	Before relying on an exemption	Exempt Property Certification where applicable
Gather inspection and repair history	Before completing report	Reports, invoices, warranties
Complete report from actual knowledge	Before required delivery	Signed report
Give report before buyer makes offer	Pre-offer	Delivery/transaction record
Review radon history	Before contract	Tests, inspections, mitigation records
Complete Delaware radon documentation	Before buyer enters agreement when applicable	Signed Radon Disclosure
Determine whether home is pre-1978	Before contract	Construction-age documentation
Complete federal lead requirements if applicable	Before buyer is contractually obligated	Lead form, records, pamphlet acknowledgement
Review newly discovered material changes	Through settlement	Written updates
Preserve transaction documents	After closing	Complete disclosure file

Practical Seller Workflow

1. Find the current Delaware form: As of September 2026, the standard Seller’s Disclosure of Real Property Condition Report published by the Division of Professional Regulation carries an August 1, 2026 effective date.
2. Confirm whether the transaction is covered or exempt: Compare the transfer to 6 Del. C. §§2576–2577 rather than relying on labels such as “estate sale,” “cash sale” or “as-is.”
3. Gather records before answering: Pull inspections, repairs, warranties, permits, radon reports, pest documents, surveys and association correspondence.
4. Answer from actual knowledge: Use Yes, No, Unknown or Not Applicable according to the form instructions and the facts.
5. Explain responsive history: Where the form calls for additional explanation, provide dates, locations, repairs or reports you actually know about.
6. Handle radon separately: Identify prior testing, provide required information in your possession and complete the Delaware radon process.
7. Check the 1978 lead threshold: Most pre-1978 residential sales require the separate federal lead disclosure procedure.
8. Deliver disclosures at the proper stage: Delaware’s condition report belongs in the transaction before the buyer makes an offer; Commission rules similarly require licensees to provide the most recent report before the buyer enters the agreement of sale.
9. Revisit the disclosures before settlement: A new leak, major casualty, newly discovered condition or other material change should not be ignored merely because the original report was already signed.
10. Keep the final file: Preserve signed disclosures, updates and supporting records after settlement.

Frequently Asked Questions

Conclusion

Delaware sellers should treat disclosure as an ongoing factual process rather than a box-checking exercise.

For many residential transactions, Delaware seller disclosure requirements call for a current Seller’s Disclosure of Real Property Condition Report, provided before the buyer makes an offer and completed according to what the seller actually knows. 

Certain transactions are specifically exempt, but inherited property, cash purchases, investor sales and as-is language should not be treated as automatic exemptions.

The state form also reaches far beyond obvious active defects. It asks about historical water problems, structural conditions, repairs, environmental concerns, pests, permits, associations, boundaries and other matters. Accurate answers require distinguishing known facts from uncertainty and from technical conclusions that belong to licensed professionals.

Radon adds a Delaware-specific disclosure process, while most pre-1978 housing can trigger separate federal lead-based paint requirements. Neither requires sellers to invent information they do not have, but known information and required records should not be concealed.

The strongest disclosure file is usually the least dramatic one: accurate answers, supporting records, timely updates and documentation showing what the buyer received.