Home valuation
Not a formula. John pulls the closed sales nearest to your house, adjusts them for what makes yours different, and tells you what the record supports. It costs nothing and it does not commit you to anything.
Request your valuation
Who is doing the valuing
Licensed Real Estate Salesperson, Team Tiburzi Real Estate at Signature Premier Properties
John Tiburzi has closed 84 sales across 41 Long Island towns since 2020, in both Nassau and Suffolk. Knowing what a block actually trades for is the part of this job that does not come out of a database.
Instead of an instant estimate
An instant estimate is a formula run on public records. It has never seen your kitchen and it cannot tell a renovation from a permit. What this site can show you instead is the record the valuation will be built from: John's own closed sales, which is where the comparable prices come from and the only reason to trust the number when it arrives.
Figures across 84 closed sales in 41 towns since 2020, from $50,000 to $1,400,000. See every one of them, with what happened in each sale.
Figures are from John Tiburzi's own closed transactions, data courtesy of OneKey MLS as distributed by MLS GRID, covering August 2020 to August 2026.
Understanding the number
Knowing what the house would sell for today is useful long before you sell it. It tells you how much equity you have, whether a refinance makes sense, what an improvement is likely to return, and what a fair split looks like when a household changes. The questions below are the ones people ask John most, answered the way he answers them in person.
A home valuation is an opinion of what a house would sell for today, on the open market, to a buyer who is under no pressure. It is not the assessed value on your tax bill, which is set by the town for its own purposes and often lags the market by years, and it is not the number an online portal shows, which is a formula.
For a sale, the valuation is the starting point for the asking price. For a refinance or a home equity line, the lender orders their own version, called an appraisal, and lends against it.
The method is comparison. John pulls the closed sales nearest to your house in time and distance, ideally in the same school district and on similar lots, and adjusts each one for how it differs from yours: a bathroom more or less, a finished basement, a newer roof, a corner lot, taxes that are higher or lower than the block. The adjusted sale prices land in a range, and where your house sits inside that range depends on its condition and on how many homes are for sale that month.
Two things the record shows matter more on Long Island than most places: property taxes, because two similar houses with a two thousand dollar difference in taxes do not sell for the same money, and the school district line, which can be worth more than the extra bedroom.
It is a decent way to find out roughly what neighbourhood you are in. It is a poor way to price a house. The formula has never seen your kitchen, does not know the basement floods, cannot tell a renovation from a permit, and treats the house across the street with the same square footage as identical to yours. On a block where the houses are alike it can be close. On a block where they are not, it can be off by more than a real estate commission in either direction.
A valuation from a person who has walked through the house, and who has sold others like it, closes that gap. That is what this form asks for.
No. Plenty of people ask because they are refinancing, settling an estate, splitting a household, or just want to know where they stand. Say so on the form. You get the same number either way, and no follow-up you did not ask for.
Nothing. A comparative market analysis is part of what a real estate salesperson does, and there is no fee for it and no obligation attached. A formal appraisal by a licensed appraiser is a different product, usually ordered by a lender, and that one is paid for by the homeowner, typically a few hundred dollars.
How a valuation is performed
01
What John does. Recent closed sales that resemble yours in size, age, lot, taxes and school district are laid next to your house, and each is adjusted up or down for the differences. Three to six good comparables usually settle it. Active and pending listings are read too, because they show what today's buyer is choosing between, but only closed sales tell you what a buyer actually paid.
Cost: nothing. Time: usually a day.
02
What a lender orders. A state licensed appraiser, chosen by the bank rather than by you, walks the house, measures it, photographs it, pulls their own comparables and writes a report the lender uses to decide how much to lend. It protects the bank, and it is the number that has to hold up when the buyer's mortgage is approved.
Cost: paid by the homeowner, typically a few hundred dollars. Time: one to two weeks.
The two should land close together. When they do not, the difference is worth understanding before a contract is signed, which is one more reason to start with the analysis.
Why the number matters
The lender lends against value, and the ratio of loan to value sets your rate. Knowing where the house stands before you apply tells you whether the numbers work, and whether waiting a season would change them.
A kitchen that puts your house above the top of the block does not come back at sale. A valuation tells you the ceiling on your street, so the money goes where the buyer will pay for it.
A home equity line needs a cushion of equity left in the house after the loan, usually around a fifth of its value. The value decides how much of that cushion you have and how much you can draw.
Estates, divorces, a move for work, a parent moving in. Every one of them turns on what the house is worth, and every one goes better when that is known early and calmly rather than under a deadline.
The form takes a minute. The number comes from John, not a formula, and asking for it commits you to nothing.