New York's Statute of Frauds makes a contract for the sale of real property void unless it is in writing and signed (General Obligations Law § 5-703). That one rule is why an accepted offer in New York City buys you nothing enforceable. Until both sides sign and the contract is delivered, the seller can take a better offer, the buyer can walk, and neither side owes the other a dollar.
That gap is not academic. A typical NYC deal runs roughly ten business days from accepted offer to signed contract, and New York has no formal attorney review period the way New Jersey does. Here the contract is negotiated between the two attorneys before anyone signs anything, which means the entire pre-contract stretch is open. And signing is only the first of seven places a deal can come apart.
Most agents only know what their own deals look like. As Managing Partner and Principal Broker at Montilla's 159 from 2001 to 2016, I personally vetted every deal in the office before it went to owners, landlords, or management companies, which is fifteen years of watching transactions fail for reasons that had nothing to do with whether the buyer wanted the apartment. What follows is the map, stage by stage, with the prevention step for each one.
The Sentence Every NYC Buyer Should Memorize
Nothing is binding until the contract is fully signed by both parties and delivered. Not the accepted offer, not the deal sheet, not the email from the listing agent saying congratulations. In New York, a seller who verbally accepts and then countersigns someone else's contract has not breached anything.
Stage 1: The Open Window Before Contracts Are Signed
This is where the largest share of NYC deals die, and it is the stage buyers understand the least. Between acceptance and signature, the seller's attorney is drafting, your attorney is reviewing building documents, and the apartment is still fully available to anyone who wants it. A second buyer who shows up with a cleaner offer, more cash, or a faster attorney can take it out from under you, and the listing agent has no obligation to tell you it is happening.
Speed is the only real defense. Choose your attorney before you bid, not after your offer is accepted. New York State rules require brokers to provide a list of attorneys rather than a single recommendation, so ask for that list early and interview two of them while you are still shopping. Have your deposit funds sitting in one account, already liquid, so nothing has to be sold or transferred when the contract lands. If you are competing on price, know how the mechanics work before you use one: I wrote the escalation clause guide for exactly this stage. And read what a NYC real estate attorney actually does before you hire one, because the difference between an attorney who turns a contract around in three days and one who takes ten is the difference between owning the apartment and losing it.
Stage 2: Due Diligence Turns Up Something in the Building
Your attorney is not just reading the contract. They are reading the offering plan, the last two years of financial statements, the board minutes, the house rules, and whatever the managing agent sends over. Deals die here on facts that have nothing to do with the apartment: an underfunded reserve, a capital assessment scheduled for next spring, active litigation, a facade repair cycle under Local Law 11, a sublet policy that blocks the buyer's plan, or a flip tax nobody mentioned.
Some of these are deal killers and some are price adjustments, and the difference is whether you find out before signing or after. The prevention is unglamorous: request the building package the day the offer is accepted, not the day the contract arrives, and give your attorney the full week they need to read it. The pre-contract due diligence checklist lists every document to ask for.
Stage 3: The Financing Contingency, and What Waiving It Really Costs
A mortgage contingency lets you cancel and recover your deposit if you cannot secure a loan commitment by the Commitment Date. There is no standard period to quote here: paragraph 8 of the Residential Contract of Sale leaves that number blank, so it is a term your attorney negotiates rather than a figure the form supplies. In a competitive bid, sellers push buyers to shorten it or waive it outright. Buyers who waive without understanding the exposure are the ones who lose a deposit. The closing process timeline walks through what paragraph 8 actually says.
The math is simple and worth writing down. The standard NYC contract deposit is 10 percent of the purchase price, wired to the seller's attorney's escrow account the day you sign. On a $1.5 million apartment that is $150,000. If you waive the financing contingency and your loan falls through, that money is at risk.
Keeping the financing contingency
- • Deposit is recoverable if the loan is denied by the deadline
- • Weaker offer in a multiple-bid situation
- • Deadline is a hard date; missing it without canceling can waive the protection anyway
- • Requires you to push the lender, not wait on them
Waiving it
- • Materially stronger offer, often worth more than a price bump to a seller
- • Full deposit exposed if financing fails
- • Only defensible with a fully underwritten pre-approval, not a pre-qualification letter
- • Ask your attorney about a shorter contingency period as the middle path
The middle path most buyers never ask for: instead of waiving, offer a compressed contingency period. A 21-day financing contingency reads to a seller as far less risky than a 45-day one, and it keeps your deposit protected. Whether that works depends on your lender's actual turnaround time, which you should confirm in writing before you offer it.
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Stage 4: The Appraisal Comes In Under Contract Price
Your lender does not lend against what you agreed to pay. It lends against appraised value. If the appraisal comes in below the contract price, the shortfall becomes cash you have to produce, and the deal turns into a three-way conversation about who absorbs it.
Co-ops are more exposed to this than condos. Comparable sales are harder to pull for a share transaction, unit mix varies inside the same building, and an appraiser working from thin comps tends to come in conservative. There are three outs when the number lands short: renegotiate the price, cover the gap in cash, or cancel if you kept an appraisal contingency. The NYC appraisal guide walks through how each one plays out.
Stage 5: The Co-op Board Package
Co-op boards have historically been the stage buyers fear most, and the fear is partly misplaced. Attorneys who handle co-op closings put the long-run rejection rate in the low single digits. What actually kills more deals here is time: an incomplete package that bounces for missing documents, a board that stops responding through August, a rate lock that expires while everyone waits.
That changed on July 28, 2026. Local Law 58 of 2026 now requires a co-op board to acknowledge a purchase application within 15 days and to decide within 45 days of a complete submission, with one 14-day extension available. Boards in buildings with 10 or more residential units that miss the deadline face fines from the Department of Housing Preservation and Development starting at $1,000 and rising to $2,000 for repeat violations. Missing the deadline does not automatically approve you, so the law is a clock, not a guarantee. It still changes the negotiation, because a purchase contract written before July 2026 assumed board review could take as long as it took, and that assumption no longer holds. The full breakdown is in the NYC co-op 45-day law article.
Two things keep the clock on your side. First, the 45 days only start when the application is complete, so a package submitted with a missing tax return is a package that never started the clock. Second, the financial section is where most packages get sent back. Fill out the REBNY financial statement line by line before your attorney assembles anything else, and know the building's debt-to-income and post-closing liquidity thresholds before you write the offer, not after the board reads it.
Stage 6: The Condo Right of First Refusal
Condo buyers often skip this section, assuming board approval is a formality. It mostly is, but the mechanism is worth understanding because it has its own failure mode. A condo board cannot reject you. Its only power over the sale is the right of first refusal, meaning the board can step in and buy the unit itself on your exact terms, or waive that right and let the sale proceed.
Most condos have roughly 30 days after receiving a complete application to act, and a board that does nothing is generally treated as having waived. The catch is the word complete. A request for additional information can restart the 30-day window, and a request that arrives on day 28 restarts it in full. That is how a condo purchase quietly slides two months past its expected timeline while a rate lock and a moving date both expire. Submit a genuinely complete application the first time and confirm receipt in writing with the managing agent.
Stage 7: The Closing Date Slips Until Someone Forces It
Most NYC contracts set the closing for a date described as "on or about," which is not a deadline. Absent a time-is-of-the-essence provision, New York law lets either party adjourn the closing for a reasonable period. Reasonable is not defined in the contract, which is exactly why closings drift.
The tool that ends the drift is a time-of-the-essence letter. Either side can send one, and courts look for three things before treating it as valid: the notice has to be clear and unequivocal, it has to say that failure to close by the stated date is a default, and it has to give the other side a reasonable period to perform. Courts have generally read about 30 days from the notice as reasonable. Once a valid letter is served, the new date is enforceable and the party that fails to show is in default, which on the buyer's side means the deposit is at risk. If your closing has been drifting with no explanation, that letter is the conversation to have with your attorney. The NYC closing process timeline covers what the last 30 days should actually look like.
The Prevention Table, Stage by Stage
| Stage | How the deal dies | What prevents it |
|---|---|---|
| Pre-contract window | Seller signs with a faster buyer | Attorney chosen before bidding; deposit already liquid |
| Due diligence | Assessment, litigation, or reserve problem surfaces | Request the building package on day one of acceptance |
| Financing | Loan denied after the contingency was waived | Underwritten pre-approval, or a shortened contingency instead of none |
| Appraisal | Value lands under contract price | Cash reserve for a gap; appraisal contingency where obtainable |
| Co-op board | Incomplete package; financials below thresholds | Confirm building requirements before offering; submit complete to start the 45-day clock |
| Condo waiver | Information requests reset the 30-day window | Complete application first time; written confirmation of receipt |
| Closing date | Indefinite adjournment past rate lock and move-out | Time-of-the-essence letter through your attorney |
The pattern is the same across all seven stages. Deals rarely die because a buyer changed their mind. They die because a document arrived late, a threshold surfaced after the offer instead of before, or a clock nobody was watching ran out.
Nothing here is legal or tax advice. Contract language, contingency deadlines, and time-of-the-essence notices are your attorney's work, and any tax consequence of a failed deal belongs to your CPA.
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