Questions to Ask the Seller About an Older Home

Short answer: The seller of an older home often knows things no inspection can see: what was replaced, what was tested and what went wrong. Ask in writing, ask for paperwork, and match your questions to the build year. For homes built before 1978, some answers are required by law, because sellers must disclose known lead-based paint and hand over any reports they have.

Tailor the list to the house: the decoder shows which materials are likely for its build year. Open the House Age Decoder with 1960 loaded →

How to use these questions

A home inspection is a visual check on one day. The seller has lived with the house for years. Good questions fill the gap between what an inspector can see and what actually happened to the house.

Ask in writing, through your agent, so answers are on record.
Ask for documents, not just yes or no: permits, invoices, warranties and test reports.
Do not expect the seller to know everything. South Carolina’s guidance on oil tanks, for example, notes that sellers may not know a buried tank exists. “I don’t know” is an honest answer and a reason to inspect.
Know your state’s disclosure form. States set their own seller disclosure rules. Oregon, for example, requires sellers to say whether they know of any underground storage tanks. Your agent can tell you what your state’s form already covers.

This guide is general information, not legal advice. Ask a real estate attorney about disclosure duties where you live.

The house’s history

When was the house built, and how do you know? (Listings sometimes estimate; see how to find out when a house was built.)
What major work has been done, when, and by whom? Were permits pulled?
Have there been additions, finished basements or converted attics?
Have there been insurance claims for water, fire or storm damage? What was repaired?

Why it matters: renovations change what is actually in a house. A 1950s house may have a 1990s kitchen and new wiring, or original everything.

Electrical

Is the main panel original? What brand is it, and has it been replaced?
Has the house been rewired, fully or partly? Is there any knob-and-tube or aluminum wiring left?
Have breakers tripped often, or have outlets felt warm?
Has a licensed electrician ever evaluated the system? Can I see the report?

Why it matters: CPSC says aluminum branch wiring was mainly installed from the mid-1960s through the mid-1970s, and our guides to Federal Pacific panels and knob-and-tube wiring explain why insurers ask about older systems.

Plumbing, water and sewer

What are the water supply pipes made of? Have any been replaced?
What is the service line from the street made of? Has the water been tested for lead?
Has the sewer line been scoped or replaced? Any backups or root problems?
Is there polybutylene or galvanized pipe anywhere?

Why it matters: EPA says lead pipes are more likely in homes built before 1986 and that a lead service line is typically the biggest source of lead in tap water. The City of Ann Arbor ties most local sewer failures it saw over two decades to Orangeburg pipe, used in some areas from roughly the early 1950s to early 1970s. See how to tell if you have a lead service line.

Lead paint (homes built before 1978)

Do you know of any lead-based paint or lead hazards in the house?
Has a lead inspection or risk assessment ever been done? Can I have the report?
Has any painted surface been removed, sanded or replaced?

Why it matters: for most housing built before 1978, sellers must disclose known lead-based paint and hazards, provide available records, give buyers the EPA pamphlet “Protect Your Family From Lead in Your Home” and include a lead warning statement in the contract. Buyers get a 10-day opportunity to test, which can be changed by written agreement or waived. See our lead paint disclosure guide.

Asbestos and insulation

Has anything in the house been tested for asbestos, such as flooring, ceiling texture, pipe wrap or siding?
Was any of it removed or covered? By whom, and is there paperwork?
What insulation is in the attic and walls? Was foam ever injected into the walls?

Why it matters: EPA advises using trained, accredited professionals to sample and remove asbestos, so records of past work tell you whether it was done properly. See our guides to asbestos floor tiles, popcorn ceilings, vermiculite and UFFI.

Heating, fuel and tanks

How is the house heated, and how old is the system?
Was the house ever heated with oil? Is there, or was there ever, a buried tank?
If a tank was removed or closed, is there a certificate, soil test or state letter?

Why it matters: buried heating oil tanks are excluded from federal tank rules and handled by states, and Oregon’s environmental agency recommends buyers hire a qualified expert to check when the owner does not know. See our buried oil tank guide.

Air, moisture and newer-era issues

Has the house been tested for radon? What were the results, and is there a mitigation system?
Any history of basement water, leaks or mold?
For drywall installed from 2001 to 2009: have you seen blackened copper wiring or repeated AC coil failures?

Why it matters: HUD’s buyer notice says EPA and the Surgeon General recommend testing all houses for radon. CPSC’s problem drywall method starts with blackened copper or AC coils and drywall installed from 2001 to 2009; see our Chinese drywall guide.

Documents to ask for

Permits and final inspections for major work.
Electrical, plumbing, roofing and HVAC invoices and warranties.
Any lead, asbestos, radon, water or sewer test reports.
Lead disclosure form and pamphlet (pre-1978 homes).
Oil tank closure or removal records.
Utility bills, if you want a sense of energy and water use.

How to read the answers

Treat the answers as leads, not conclusions. A confident “it was all replaced” with permits and invoices is worth a lot; the same sentence with no paperwork is a question for your inspector. Vague answers about electrical, plumbing or tanks are a signal to book the matching specialist before your inspection period ends, not a reason to panic. And if a seller declines to answer, note it in writing and ask your agent how to proceed. The goal is to arrive at closing knowing what you are buying, with a budget for the things that are old but working.

Questions to ask the inspector afterward

Do the seller’s answers match what you saw?
Which answers should I verify with a specialist before my inspection period ends?
Are there any signs of work that the seller did not mention?

Questions to ask your insurance company

Which of these answers affect eligibility or premium (panel brand, wiring type, plumbing material, roof age, oil tank)?
Do you need documents, such as an electrician’s report, before binding coverage?

Common misunderstandings

“If it’s not on the disclosure form, it doesn’t exist.” Sellers disclose what they know, and forms vary by state.
“Verbal answers are enough.” Get answers and documents in writing.
“New paint means no lead.” Lead paint is often underneath newer coats.

Before-you-buy checklist

Send these questions through your agent early in the process.
Collect every document the seller can provide.
Book specialty inspections for anything the seller cannot answer; see specialty inspections by build year.
Check the era’s typical materials with the House Age Decoder.