Cash Offer for My House on Long Island: How That Number Is Built, Line by Line

If you have typed cash offer for my house Long Island into Google, gotten a number back, and then sat looking at it wondering where on earth it came from — you are not alone. Most cash buyers hand you a figure with no arithmetic attached. No comps, no repair list, no explanation.

So this post builds a cash offer from scratch, line by line, on a realistic Long Island house, and shows you every subtraction. We are trusted New York cash buyers, and we would rather you understood the arithmetic than simply took our word for it. By the end you can check any offer you receive — ours or anyone else’s — with a pen and the back of an envelope.

One note on geography, because the numbers depend on it. When we say Long Island we mean it the way people who live here mean it: Nassau County to the west and Suffolk County to the east, roughly 2.9 million people between them at the 2020 census. The island keeps running west into Queens and Brooklyn, but the prices, tax bills and septic rules driving this math belong to the two counties.

Get Your Free Cash Offer Now!

Fill out this form to get your no-obligation all cash offer started!

What is a cash offer for my house on Long Island actually based on?

Every honest cash offer is one long subtraction: what the house will be worth once it is fixed, minus the cost of fixing it, minus the cost of owning it meanwhile, minus the cost of selling it again, minus the buyer’s profit. What survives is your offer.

You may have run across the “70% rule” — take 70% of the finished value, subtract repairs, offer that. It is kitchen-table shorthand, and blunt enough to be wrong in both directions: it ignores what carrying a house through a Suffolk winter costs, and it assumes a $600,000 house and a $1.2 million house renovate proportionally. They do not. A buyer quoting you the 70% rule has not actually priced your house. Make them do the four steps below.

What is my house worth fully renovated — and who decides that number?

The after-repair value (ARV) is set by what comparable renovated homes within a few blocks of you have actually closed at recently — not by Zillow, not by what your neighbour is asking, and not by what you paid in 1994.

This is the number to push hardest on. Everything downstream is subtracted from it, so a buyer who shades the ARV down by $40,000 has quietly taken $40,000 out of your offer without touching another line.

In June 2026 the median single-family sale price was about $890,000 in Nassau and around $718,000 in Suffolk — useful orientation, useless as a valuation, since a 1958 cape near the LIRR and a waterfront colonial are both “Long Island.” So ask any buyer to email you the three sold comparables they used, with street addresses and closing dates. You can check them yourself: deeds are public record, filed with the Suffolk County Clerk at 310 Center Drive, Riverhead, or the Nassau County Clerk at 240 Old Country Road, Mineola, where records are indexed by Section, Block and Lot. A buyer who will not show comps is hiding the foundation the whole offer rests on.

How do cash buyers price repairs on an older Long Island house?

Room by room and system by system, at contractor pricing, from an actual walkthrough — never from a per-square-foot rule of thumb.

Long Island’s housing stock skews post-war, and the expensive items repeat: roof, heating plant, electrical panel, kitchen, baths, windows. Two line items here are genuinely local and catch sellers off guard.

The first is the buried oil tank. If your house went up before about 1990 there is a decent chance a steel tank is still in the yard, and Nassau and Suffolk both want a removal or abandonment certificate before it changes hands cleanly. If it has leaked, remediation runs into five figures.

The second is wastewater. Much of Suffolk sits on cesspools and septic rather than sewers, and Article 6 of the Suffolk County Sanitary Code puts those systems on an inspection cycle with results filed to the county health department. Your buyer’s attorney will ask for that paperwork, and a failed system is not a small line.

Ask for repairs as an itemised list, never a lump sum. “$85,000 in repairs” is an opinion. “Roof $22,000, boiler and oil-to-gas conversion $14,000, kitchen $28,000, two baths $16,000, floors and paint $5,000” is something you can argue with — and sellers who argue often get it corrected.

What does it cost to own and re-sell the house, and why does that come out of my price?

Because the buyer does not get paid the day they buy. They own your house for roughly six months, pay every bill it generates, then pay to sell it — and that money comes out of the offer.

What does six months of holding a Long Island house cost?

Property taxes here are among the highest in the country and they do not pause for renovation. Add insurance (higher on a vacant house), utilities kept on for the trades, lawn and snow, and the cost of the money itself. On a mid-range Long Island house, six months of that lands near $24,000.

What comes off at the far end, when the buyer resells?

Commission on the resale, usually around 5%. New York State’s transfer tax of $2 per $500 — 0.4%, and legally the seller’s tax, so the buyer pays it when they resell. Attorney fees, and whatever the retail buyer negotiates off after inspection. Worth knowing: New York’s 1% mansion tax starts at $1 million, which in Nassau — median already near $890,000 — is a real ceiling on how far a renovated house can be pushed.

How much profit does a cash buyer build in?

Honestly? Typically 8% to 12% of the finished value. Anyone claiming less is either not telling you the truth or will discover mid-project that they cannot afford to finish — which is how sellers end up back at square one two months later.

So what does the offer come out to? The full arithmetic on one Suffolk ranch

Here is the whole calculation on a dated three-bedroom ranch that would be worth $650,000 fully renovated.

That is 67% of the finished value — and notice it beats the crude 70% rule ($650,000 × 0.7 − $85,000 = $370,000). That gap is exactly why you want the real arithmetic.

How much less is that than just listing it?

On this house, roughly $50,000 less than an as-is listing would net — and that gap is the honest price of speed and certainty.

Play it out. Listed as-is at $520,000 — a price that reflects the roof and the boiler — you pay about 5% commission ($26,000), the 0.4% transfer tax ($2,080) and an attorney, netting near $489,000. That takes sixty to ninety days, through showings, and only if the buyer’s mortgage survives an appraisal on a house with a bad roof, which is precisely where these deals die.

Renovate first and list at $650,000 and you net more still, perhaps $519,000 — but you are fronting $85,000, managing contractors, and carrying the house eight or nine months before you see a dollar.

The cash offer is $436,000, in two to three weeks, no repairs, no showings, no commission, no financing contingency — which is what people are really buying when they decide to sell a house as-is on Long Island. Ask in writing which seller-side costs the buyer covers: many cover the attorney and standard closing costs, but the state transfer tax is legally yours, so find out who is actually paying it.

When should I NOT take a cash offer for my house on Long Island?

If your house is in financeable condition, you can wait ninety days, and you can tolerate strangers walking through it — list it. Fifty thousand dollars is a lot of money to pay for convenience you do not need.

A cash sale earns its discount when at least one of these is true: the condition would fail a lender’s appraisal, there is a deadline you cannot move (an auction date, a probate schedule, a job starting in another state), the house is tenant-occupied or hoarder-condition and cannot be shown, you inherited it from three hundred miles away, or certainty simply matters more to you than the last $50,000. If none of that describes you, a good local agent will make you more money, and we will tell you so.

How do I get a cash offer on Long Island NY without being lowballed?

Ask for the four numbers in writing before you sign anything: the ARV with its comps, the itemised repair figure, the holding and resale costs, and the profit margin. An offer that survives those questions is a real offer.

Three more questions. Ask for proof of funds — an actual dated bank letter. Ask whether the contract can be assigned to someone else; if it can, you may not be dealing with whoever actually closes. And ask what happens if they walk after inspection. Any buyer worth talking to will explain their cash offer process before you ever sign.

We are a family-run buyer working across Nassau and Suffolk, and we would rather show you the arithmetic and lose the deal than win one you feel bad about a month later. If you want that walkthrough on your own house, start on our we buy houses in Long Island page — we will come out, look at the roof, and show you every line of the subtraction.

Fill in the form below and we will get straight to work on your numbers, or call the Long Island cash home buyers on our team directly at (347) 685-9317. No obligation, and no pressure if the answer turns out to be “list it.”

Get Your Free Cash Offer Now!

Fill out this form to get your no-obligation all cash offer started!