Disclaimer

Informational use only

BlockBook republishes public records from City of New York open data and performs standard mortgage arithmetic on them. Nothing on this site is financial, legal, tax, or investment advice, and no figure shown here should be the sole basis for a purchase, sale, loan, or legal decision.

Data accuracy

Public records can be incomplete, delayed, or wrong, and this site may display them with errors of its own. In particular:

Tax figures are computed from the city's current assessment roll and official class rates. They can differ from the owner's actual bill, which may include abatements, exemptions, or recent changes.
Condominium and co-op units are assessed individually; a building-level lookup may show the base lot rather than any specific unit.
Assessed "market values" are the Department of Finance's estimates and are usually well below what a property would sell for.
Rent-regulation status is an indicator derived from public datasets, not a legal determination.

Verify anything important directly with the NYC Department of Finance, ZoLa, or a licensed professional.

Advertising and affiliate disclosure

BlockBook is free to use and is supported by advertising. Two kinds may appear on the site:

Display ads served by Google AdSense, in clearly separated spots.
Affiliate links — buttons such as "Compare today's rates" may point to lenders or comparison services that pay BlockBook a commission if you use them. These never cost you anything extra, and they are always labeled "Advertisement" with rel="sponsored".

Advertisers and affiliate partners have no influence over the property data, tax figures, or calculations shown anywhere on this site — those come only from official public records and standard mortgage math. BlockBook does not recommend, rank, or endorse any specific lender, and appearing as an advertiser is not an endorsement.

No warranty

This site is provided "as is" without warranties of any kind. We are not liable for decisions made based on information shown here.