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Selling a house with a septic system in New York

Since March 2024 you can no longer pay $500 to skip the disclosure form. Question 36 asks how old your septic system is, when it was last pumped, how often, and whether it has any known defects — and most sellers cannot answer a single part of it. Here is what you are actually required to do, and what you should do anyway.

The short version. You must complete the disclosure form — the $500 opt-out is gone. You must answer question 36 honestly from what you actually know. You are not required to investigate, inspect or look anything up. "Unknown" is a legitimate answer and it will not get you sued. It will, however, cost you money at the negotiating table, which is a different problem and the one this page is really about.

What changed, and when

New York has had a Property Condition Disclosure Act since 2002, but for two decades most sellers simply handed the buyer a $500 credit at closing and skipped the form. That option was repealed. For contracts entered into on or after 20 March 2024, the credit is no longer available and the disclosure statement is effectively mandatory for most one-to-four family sales.

The same amendment renamed the liability section and removed the language that had let courts limit sellers' exposure to that $500. A seller who wilfully fails to perform under the Act is now liable for the actual damages suffered by the buyer, alongside any other remedy that already existed.

The form itself was updated again for contracts entered into on or after 1 July 2025.

Question 36, line by line

The septic question asks four things:

What it asks	What sellers usually know
What type of sewage system — public sewer, private sewer, septic or cesspool?	Usually knowable. If you have never paid a sewer bill and there is a lid in the lawn, it is septic.
If septic or cesspool, what age?	Rarely known. Often older than the current owner's tenure.
Date last pumped?	Sometimes — if you have the invoice.
Frequency of pumping?	Sometimes. "Every three years" is an answer; "when it backed up" is also an answer.
Any known material defects?	This is the one that matters. See below.

"Known material defects" is the part to be careful with

The other four are facts you either have or do not have. This one is about your own knowledge, and it is the line a buyer's attorney would look at if something went wrong after closing.

If the system backed up twice last winter, if a contractor told you the leach field was failing, if there is a wet patch over the field that never dries, if you have been pumping annually because the tank fills too fast — you know about a defect, and answering "no" is the thing that creates liability. Not the unknown age. Not the missing pump date.

What actually counts as a failing system →

You are not required to find out

This is the part almost nobody states plainly. Nothing in the Property Condition Disclosure Act requires a seller to undertake or provide for any investigation or inspection of the property, or to check any public records.

The standard is your actual knowledge at the time you sign — not what you "should have known" had you looked. A buyer's attorney would have to prove you actually knew about a defect, not that it was sitting in a county file you never opened.

Real Property Law §462(3) and §461(3). This is not legal advice — see the note at the end.

So: you can write "Unknown" for age, date last pumped and frequency, and you have complied with the law. Do not invent an answer to look organised. A guess that turns out to be wrong is worse than an honest blank, because a guess is a representation and a blank is not.

Why you should find out anyway

The legal reason to look up your septic record is weak. The commercial reason is strong.

Put yourself on the other side of the table. A buyer reads a disclosure form with "Unknown" written three times against the septic system on a house that is not on public sewer. What they hear is: the seller has no idea how old this thing is, when it was last serviced, or whether it works. What they do next is one of three things — order their own inspection and use whatever it finds as leverage, ask for a price reduction against a replacement they have not priced, or quietly move on to the next house.

A septic replacement in this region runs $15,000 to $45,000. A buyer negotiating against an unknown will assume the top of that range. An hour on the phone to the county, and a $400 pump-out receipt, is the cheapest way to take that argument off the table.

How to get your property's septic record

Counties hold records of approved septic installations, and most will release them to the owner on request. The process is completely different in each one, and only some publish it.

Westchester County

Westchester has a documented process. Complete the county's Septic System Sketch Request — a request for approved well and/or subsurface sewage treatment system records. You will need:

The property address and the municipality
The original tax map designation
The year the house was built
The dates of any bedroom additions

Your town assessor or building department can supply the tax map designation and year built. Include a daytime phone number, and allow time — if the records sit in the county archives, retrieval can take up to 10 business days. For help, call Laurie Hauer on (914) 995-7285.

If you only want complaints or recent violations rather than the full record, that is a separate and quicker request.

Dutchess County

Dutchess assigns a named public health engineer to each municipality, and that person is your contact for septic questions including records. The county publishes the directory with direct phone numbers and email addresses — find your town on it. Environmental Health Services: 845-486-3404, ehs@dutchessny.gov.

Putnam, Ulster, Rockland and everywhere else

We have not been able to document the process in these counties, and we would rather say so than guess. Call your county health department and ask: "I am selling my house and need to complete the property condition disclosure. How do I obtain the septic record for my address?"

Putnam County Department of Health — 845-808-1390
Ulster County Department of Health — (845) 340-3010
Rockland County Department of Health — 845-364-2656

If you get an answer, we would like to hear it — corrections and additions go straight into this page. hello@nysepticguide.com

The pamphlet you are supposed to hand over

Separately from the disclosure form, New York's General Business Law requires that a copy of the state health department's pamphlet on individual sewage disposal systems be delivered to the buyer at the transfer of title of a home served by such a system. The obligation used to apply only to newly constructed homes; that restriction was removed. There is a civil penalty of up to $250.

There is also a second limb worth knowing: where the political subdivision the home sits in has published its own waste treatment handbook or pamphlet on individual sewage disposal systems, that material is to be supplied to the buyer as well.

General Business Law §396-s, as amended in 2024. Ask your attorney or your agent to confirm it is in your closing package — in practice this is easy to overlook, and it is one of the few parts of the process with a specific dollar penalty attached.

The pump-out most contracts require

This one is not in any statute — it is in the contract. New York residential purchase contracts commonly carry a septic clause requiring the seller to provide, at or before closing, a written statement from a qualified technician that the tank has been pumped within three months prior to closing and that the system appears to be operating properly.

Three practical consequences:

Do not pump too early. If you pump when you list and the sale takes five months, you will be paying for it twice. Time it to the contract, not the listing.
The receipt answers question 36. Pumping before you complete the form turns "Unknown" into a date, and gives the technician a chance to tell you the condition of the tank.
Ask who is qualified to write the statement. Putnam and Westchester license septic contractors and collectors and publish registers you can check. Dutchess, Ulster and Rockland license nobody and rely on a professional engineer or registered architect instead. Whoever you hire, the statement is worth more if the county recognises them.

What a pump-out costs →

What the buyer's inspection will look at

A standard home inspection does not include the septic system. A buyer who wants it looked at pays separately for a septic inspection, typically $400 to $900, and that inspection is where surprises surface: a tank at the end of its life, a saturated leach field, a system sized for fewer bedrooms than the house now has, or a cesspool where the buyer assumed a septic system.

That last one matters more than it sounds. If your property has a cesspool rather than a septic system, say so on the form. It is a specific option in question 36, and it changes what the buyer is taking on.

More on septic inspections when buying or selling →

Before you list — a short checklist

Establish whether you are on septic, cesspool, or a private or public sewer. If you have never had a sewer bill, it is not public sewer.
Look for paperwork: pump-out invoices, a repair bill, an as-built drawing, anything from the county. The closing file from when you bought the house is the first place to look.
Call the county and ask how to get the septic record. Free, and it may answer the age question outright.
If you know of a defect, write it down honestly. This is the only line with real liability attached.
Time the pump-out to the contract, not the listing.
Check the health department pamphlet is in your closing package.

If the inspection finds a failing system, do not assume you are paying for all of it. New York reimburses part of the cost of replacing a failing septic system in 52 counties, and several counties run programmes larger than the state's. A failing system discovered during a sale is exactly the situation those programmes exist for — though the timing rarely suits a closing date, since you must apply and be approved before work starts. Check whether your county participates →

Who does not have to do any of this

The disclosure obligation covers residential real property — a one-to-four family dwelling used or intended as a home. It does not apply to condominium units, cooperative apartments, or property in a homeowners' association that is not owned in fee simple, and it does not apply to unimproved land. There are also a number of exempt transfers set out in the statute — estate sales, transfers between spouses, foreclosures and similar. If you think you may be exempt, that is a question for your attorney, not for a website.

Last checked 10 September 2026. Sources: New York Real Property Law Article 14, the Property Condition Disclosure Act, in particular §461(3), §462, §463 and §465 as amended effective 20 March 2024; General Business Law §396-s as amended 2024; New York State Bar Association and title-industry commentary on the 2024 amendments; Westchester County Department of Health septic records request; Dutchess County Department of Behavioral & Community Health public health engineers directory.

This page is information, not legal advice. We are not attorneys. Disclosure obligations turn on the facts of your sale and on contract terms we cannot see, and the case law on the 2024 amendments is still developing. Ask your real estate attorney about your own transaction before relying on anything here.

From NY Septic Guide

Facing a $30,000 septic quote?

New York may pay $25,000 of it — and most county pages still say $10,000.

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A quote comparison spreadsheet built for your county — 23 line items with the ones your county requires already on it, and a grant calculator that shows what you would pay under each programme. Six sheets included, one for each county we cover in depth plus a statewide version.
Phone scripts for the county and for contractors, so you ask the questions that actually change the answer.
Every source named and dated, and the open questions listed rather than papered over.

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See what's inside →

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