Explore BlockBook
Everything on the site, in one place.
Tools
| Mortgage calculator The main tool — payment breakdown and amortization with any NYC property’s real taxes. |
| Property tax lookup Type an address, get its actual tax bill, assessed value, and full building record. No login. |
| Property tax calculator Estimate any NYC tax bill with the real formula: assessment ratios and the live FY2026 class rates. |
| Mansion tax calculator The buyer-paid 1%–3.9% tax on purchases of $1 million and up. |
| Transfer tax calculator What sellers pay NYC and New York State when a property changes hands. |
| Buyer closing costs Itemized: mansion tax, recording tax, title insurance — condo vs co-op vs new development. |
| Seller closing costs & net proceeds Commission, transfer taxes, flip tax — and your walk-away number. |
| CEMA savings calculator What assigning the existing mortgage saves on New York’s recording tax. |
| Mortgage points calculator Buying down your rate: cost, monthly savings, and the break-even month that decides it. |
| 421-a expiration calculator Check any address for expiring abatements and the estimated bill after the benefit ends. |
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: 6.67% (30-yr avg) This week’s average mortgage rates — 6.67% (30-year) and 5.96% (15-year) — plus what actually determines the rate an NYC buyer gets quoted. |
| Frequently asked questions Short answers on NYC taxes, down payments, and where the data comes from. |
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. |