Step-by-step
Access DOB NOW Build
Navigate to a810-dobnow.nyc.gov and select "Search by Property." DOB NOW Build is the current system for permit applications filed after 2016. Enter the address or BIN to pull up the property record.
Check BIS for Historical Permits
For permits filed before DOB NOW, search the legacy Buildings Information System (BIS) at a810-bisweb.nyc.gov. BIS contains historical permit data going back decades. Search by address, block/lot, or BIN.
Review Active Permits
The permit list shows job filings (NB for New Building, A1 for Alteration Type 1, etc.), application status, filing date, approved date, and expiration. Active permits indicate ongoing or planned work.
Check Job Filing Documents
Click on any job number to view associated documents including plans, approved drawings, technical reports, and inspection records. These documents reveal the scope of approved work.
Verify Permit Expiration
NYC building permits expire if work is not commenced within 12 months of issuance or if work is suspended for 12 months. Check the expiration date and any renewal filings.
Use RegWatch for Combined View
RegWatch aggregates permit data from both DOB NOW and BIS, showing all active and historical permits alongside violations, complaints, and ownership data in a single interface.
Overview
Building permits in NYC are issued by the Department of Buildings (DOB) and are required for most construction, alteration, and demolition work. Checking permit records reveals what work has been approved, what is currently underway, and whether any unauthorized work may have occurred.
Types of NYC Building Permits
- NB (New Building) - Construction of a new structure
- A1 (Alteration Type 1) - Major alterations changing use, egress, or occupancy
- A2 (Alteration Type 2) - Multiple work types not qualifying as A1
- A3 (Alteration Type 3) - Minor alterations (one work type only)
- DM (Demolition) - Full or partial demolition
Why Check Permits?
Permit searches are critical for buyers, investors, and property managers. Unpermitted work can result in violations, required demolition of improvements, and complications during sales. Lenders and title companies require clean permit histories before closing.
Frequently asked
How long are NYC building permits valid?
NYC building permits are valid for 12 months from issuance. They expire if work is not started within that period or if work is suspended for 12 months. Permits can be renewed before expiration.
Can I check building permits online for free?
Yes. Both DOB NOW Build and BIS are free public databases. You can search for permits, view application details, and download associated documents at no cost.
Skip the manual research.
RegWatch aggregates 250+ government sources, including DOB, HPD, ACRIS, and DOF, into one searchable platform.