Explore BlockBook
Tools
| Mortgage calculator See what a home would really cost you each month — we fill in that property’s actual taxes for you. |
| Property tax lookup Type any NYC address and see what the owner actually pays in property taxes each year. Free, no sign-up. |
| Property tax calculator Estimate a yearly tax bill using the same math the city uses — no guessing. |
| Mansion tax calculator Buying at $1 million or more? NYC charges an extra 1%–3.9% at closing. See exactly how much. |
| Transfer tax calculator Selling? The city and state each take a cut of your sale price — see what yours would be. |
| Buyer closing costs All the fees you pay on top of the down payment, itemized — and why co-ops are thousands cheaper to close on. |
| Seller closing costs & net proceeds What selling really costs — broker fee, taxes — and the amount you’d actually walk away with. |
| CEMA savings calculator A little-known paperwork move can knock thousands off your mortgage tax. See what you’d save. |
| Mortgage points calculator Paying extra upfront for a lower interest rate — worth it or not? Find your break-even point. |
| 421-a expiration calculator Some buildings have a tax discount that runs out. Check any address before you buy — and see how big the jump could be. |
| Pied-à-terre tax calculator NYC’s new tax on second homes started July 2026. See the rates, who’s exempt, and check any address’s exposure. |
| 485-x tax incentive calculator The program that replaced 421-a for new buildings. Find a project’s tier, exemption schedule (up to 40 years), and dollar savings. |
Property taxes by borough
| Manhattan property taxes Typical bills, effective rates, and an address lookup for Manhattan. |
| Brooklyn property taxes Typical bills, effective rates, and an address lookup for Brooklyn. |
| Queens property taxes Typical bills, effective rates, and an address lookup for Queens. |
| Bronx property taxes Typical bills, effective rates, and an address lookup for Bronx. |
| Staten Island property taxes Typical bills, effective rates, and an address lookup for Staten Island. |
Guides
| NYC Property Tax Rates 2025–2026: All Four Classes Explained Current NYC property tax rates for fiscal year 2026: Class 1 (19.8433%), Class 2 (12.439%), Class 3 and Class 4 — plus how your actual bill is calculated. |
| NYC Mortgage Recording Tax: Rates, Who Pays, and How to Reduce It The NYC mortgage recording tax adds 1.8%–1.925% to your closing costs on a condo or house. What it costs, why co-ops are exempt, and how CEMA loans reduce it. |
| Current Mortgage Rates for NYC Buyers: 7.28% (30-yr avg) This week’s average mortgage rates — 7.28% (30-year) and 6.6% (15-year) — plus what actually determines the rate an NYC buyer gets quoted. |
| How to Find What a House Sold For in NYC (Free, Official Records) Every NYC sale price is public record. Three free ways to look one up — instant address search, ACRIS deeds, and DOF rolling sales — plus the co-op and Staten Island blind spots that trip everyone up. |
| What Is a BBL Number in NYC? (And How to Find Yours) BBL = Borough-Block-Lot, the 10-digit ID behind every NYC property record. What the digits mean, where it’s used, and a free address-to-BBL finder. |
| NYC Property Record Terms Explained: FAR, BBL, Assessed Value & More Every term on a NYC property record in plain English: assessed value vs. sale price, tax and building classes, FAR and air rights, garden levels, gross square feet, rent regulation, and more. |
| Types of Mortgages Explained: Fixed vs. FHA, VA, ARM & Interest-Only How every major mortgage type works and why the rates differ: 30/20/15-year fixed, FHA’s sticker-price trick, VA, adjustable-rate (ARM), interest-only — with the NYC co-op, condo, and jumbo caveats. |
| NYC Closing Costs Explained What each line on an NYC buyer’s closing sheet actually is — mansion tax, mortgage recording tax, title insurance, points, attorney and board fees — who charges it, how it’s calculated, and how to shrink it. |
| Frequently asked questions Short answers on NYC taxes, down payments, and where the data comes from. |
Research
| What NYC homeowners actually pay Original data study: effective tax rates for every borough and ZIP code, recomputed daily from the city’s assessment roll. |
Property records
| Recent NYC sales Record pages for properties sold in roughly the last 90 days — real taxes, assessed value, and building details for each. |