Most sellers hear about Connecticut's property disclosure law the same way: fill out the form, or skip it and credit the buyer $500 at closing. Treated as a line item, $500 sounds like a rounding error against a seven-figure sale. That is exactly the miscalculation that catches sellers of older Cos Cob homes off guard, because the $500 is not the cost of skipping disclosure. It is the price of admission to a much larger risk that only shows up after the house has already changed hands.
Cos Cob's housing stock makes this more than an abstract legal point. The Strickland Road Historic District carries homes built between roughly 1730 and 1938, and Bush-Holley House stands as Greenwich's only National Historic Landmark. A neighborhood built out over two centuries means sellers routinely inherit systems, conversions, and buried infrastructure they never installed and may not fully understand. That is precisely the situation Connecticut's disclosure statute was written for, and precisely where the $500 shortcut tends to backfire.
The Choice Every Seller Actually Faces
Connecticut's Uniform Property Condition Disclosure Act requires sellers of residential property with four units or fewer, including condos and co-ops, to give buyers a completed Residential Property Condition Disclosure Report before the buyer signs a binder, contract, or option. The report runs nine lettered sections and 65 questions, covering everything from the roof to the heating system to known environmental issues. If a seller does not furnish it, Connecticut General Statutes Section 20-327c requires a $500 credit to the buyer at closing instead.
Framed that way, it looks like a simple cost comparison. Historically, sellers who did not live in the home day to day, such as estates, executors, or landlords managing a rental, often chose the credit rather than risk answering 65 questions incorrectly. The logic seems sound on paper. It falls apart the moment a real defect surfaces after the sale.
| Complete the disclosure report | Pay the $500 credit instead | |
|---|---|---|
| Upfront effort | Answer 65 questions across 9 sections honestly | None required |
| At closing | No credit owed | $500 credit to buyer, per C.G.S. 20-327c |
| If a known defect surfaces later | Protection if disclosed accurately at the time | Full exposure to misrepresentation or fraud claims |
| Damages if a court finds concealment | Limited to the specific claim, if any | Not capped at $500. Can include repair costs and attorney's fees |
Why the Credit Doesn't Buy What Sellers Think It Buys
Here is the part that gets missed. Choosing the $500 credit only waives the statutory paperwork requirement. It does not immunize a seller who knew about a real problem and said nothing. Connecticut courts have allowed misrepresentation claims to proceed even in cases where a disclosure form was completed, which means the exposure runs in both directions. A seller who fills out the form inaccurately and a seller who skips it entirely can both end up facing a claim if a buyer later proves the seller knew about a material defect and failed to say so.
That claim is not capped at $500. It can include the actual cost of the concealed problem, plus attorney's fees. For a Cos Cob property with an aging oil-fired boiler, a decades-old chimney liner, or a foundation with unexplained cracking, the gap between $500 and the real number can run into tens of thousands of dollars. The $500 credit was never designed to be cheap insurance against a lawsuit. It is only cheap if nothing is actually wrong.
The Question Every Older Cos Cob Home Raises
Inspectors working across Greenwich describe the challenge plainly: pre-war colonials in neighborhoods like Cos Cob come with aging mechanical systems that newer construction in Riverside or Glenville simply doesn't have. One recurring example is the buried heating oil tank, a fixture in homes built before natural gas lines reached this part of Fairfield County.
State law does not require every home sale in Connecticut to include an oil tank sweep. But sellers who assume that means the issue is optional are missing a local wrinkle. Some towns, including Greenwich and Stamford, have local ordinances that require tank removal before a property can be sold, which goes further than state law and applies regardless of whether the tank is currently in use. On top of that, FHA and VA lenders frequently require proof that no contamination exists before they will approve financing, which means a buyer's mortgage, not just their peace of mind, can hinge on this question.
A tank sweep and soil test typically runs $300 to $600. A leaking tank that goes undetected until later can cost $20,000 to $100,000 or more to clean up, and that bill lands on whoever owns the problem when it's found. In a house built in the 1930s that switched from oil to gas at some point in the last several decades, the tank does not always leave with the furnace. Signs an old tank may still be in the ground include copper lines that used to feed an oil burner, capped pipes near the foundation, or patched concrete where a fill line once ran.
What This Actually Means for a Cos Cob Listing
Statewide, Connecticut homes were selling in a median of 39 days as of May 2026. That pace does not leave much room for a deal to stall out over a discovery that could have been handled before the sign went in the yard. A buyer's attorney or lender raising an oil tank question three weeks into a contract is a very different conversation than a seller who already has clean test results in hand.
The practical move for a Cos Cob seller is to treat disclosure and tank verification as pre-listing steps, not post-offer negotiations.
- Order your own oil tank sweep before listing, rather than waiting for a buyer's lender to require one under contract.
- Pull any old permits, invoices, or paperwork related to a heating system conversion, especially if the home switched from oil to gas at some point.
- Complete the Residential Property Condition Disclosure Report in full and accurately, rather than defaulting to the $500 credit as a shortcut.
- If your property sits within the Strickland Road Historic District or carries other documented historic status, keep in mind that additional records may exist beyond what's on file with the town.
- Loop your attorney in on timing early, since the disclosure report has to reach the buyer before they sign a binder or contract, not after.
None of this changes what your home is worth. It changes how smoothly it gets there, and whether a $500 line item quietly becomes something much larger six months after closing.
A Few Questions Worth Asking Before You List
Is an oil tank sweep legally required to sell a home in Cos Cob? Connecticut state law does not mandate testing for every sale, but Greenwich has a local ordinance requiring tank removal before a property can close, and many lenders require proof of no contamination for FHA or VA financing.
What if I genuinely don't know whether my home ever had a buried tank? That uncertainty is common in homes built before natural gas service reached this part of Fairfield County. A tank locate service can scan the property, and clues like capped copper lines or patched foundation walls often point to the answer before any digging happens.
Does paying the $500 credit protect me if a problem shows up after closing? No. It only waives the paperwork requirement. If a buyer later shows you knew about a material defect and didn't disclose it, you remain exposed to a misrepresentation or fraud claim, and that liability is not capped at $500.
Selling a home with real history behind it takes more than a fast photo shoot and a sign in the yard. If you're thinking about listing an older home in Cos Cob or anywhere else in Greenwich, Barbara Zaccagnini has spent decades walking sellers through exactly these details before they become closing-day surprises. For more on preparing an older property for sale, her guide to maintaining historic homes in Riverside and Greenwich is a useful next read, and her complete guide to selling your house covers the rest of the timeline. Let's Connect before you list, not after the inspection turns up a question you weren't ready for.