NYC says your home is worth $X.
They're often wrong.
Every January, the Department of Finance mails your Notice of Property Value. If the number is too high, you overpay — until you appeal by the March deadline. TaxTrim checks your assessment against real comparable sales, free.
The verdict is free. The appeal packet is $39, only if you want it.
Works for Class 1 homes (1–3 family houses) in Brooklyn, Queens, Staten Island & the Bronx. Know your BBL? You can enter it directly on the next screen.
How it works
Deterministic math on official city data. No guesswork, no AI making up numbers.
Enter your address
We resolve it to your property's BBL (borough-block-lot) and pull your official Department of Finance assessment.
We find your real comps
Recent arms-length sales of similar homes near you — same borough, same tax class — ranked by recency and distance.
You get the verdict, free
Likely over-assessed, borderline, or probably fair — plus the estimated dollar gap and your assessment vs. your block's median.
Appeal with the $39 packet (optional)
Comparable-sales analysis, a pre-filled NYC Tax Commission complaint, step-by-step filing instructions, and a deadline calendar. Print it, file it, done in one evening.
What the numbers look like
A sample result card — yours is computed live from city data.
Gap: $118,000 in market value → roughly $7,080 in assessed value → about $1,420/yr in overpaid tax at the Class 1 rate.
Sample figures for illustration. Your card uses your property's real data. Data vintage is always shown on your result.
The $39 math
Stated in arithmetic, not adjectives.
- Grievance firms take 40–50% of your savings — on a $1,420/yr win, that's $568–$710 out of your pocket.
- Flat-fee services take ~25% of first-year savings — about $355 on the same win.
- TaxTrim's packet is $39 flat. You file it yourself in one evening.
- The verdict is free either way. If you're fairly assessed, we'll tell you — and you pay nothing.
Honest limits
TaxTrim is an informational tool — not legal advice, not tax advice, and not a guarantee of a reduction. Verify every figure against your own Notice of Property Value. You file the appeal yourself; the packet just makes it a one-evening job.
We show the "data as of" date on every result. If the city's sales feed goes stale, we tell you — we never quietly compute a verdict on old data.
Questions
What's the deadline?
The NYC Tax Commission filing deadline for Class 1 properties is typically mid-March each year — it moves slightly, so your packet includes that year's exact deadline pulled from the Tax Commission calendar each January. Miss it and the number locks in for the year.
Which homes does this work for?
Class 1 properties: 1-, 2-, and 3-family homes in Brooklyn, Queens, Staten Island, and the Bronx. Condos and co-ops (Class 2) use a different valuation method — the check will tell you if your property isn't a fit.
Where does the data come from?
NYC Open Data: the Department of Finance property assessment roll, the rolling calendar sales file, and PLUTO for locations. Every result card stamps its data vintage.
What does the $39 packet include?
Your comparable-sales analysis with ranked comps, a pre-filled Tax Commission complaint narrative drafted from your exact numbers, step-by-step filing instructions, the deadline calendar, and a printable PDF. Plus an optional $49/year Assessment Watch that monitors your BBL and re-runs every January.
Is my address stored or shared?
Your address is used to look up public assessment records and compute your verdict. We never sell your data. Email is only used for your results and the packet you buy — one-click unsubscribe on everything, always. See our privacy policy.