NYC Property Intelligence

NYC Permit Search by Address

Search active and historical building permits for any NYC property. Track DOB job filings, permit status, and construction activity across all five boroughs with daily refresh.

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2.9M+ NYC properties · DOB NOW + BIS combined · Updated daily

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Sample Properties in New York City69,691 indexed · April 2026

How do I search building permits in NYC by address?

NYC building permits are issued and tracked by the Department of Buildings (DOB) through two systems: DOB NOW (a810-dobnow.nyc.gov) for current filings, and BIS (a810-bisweb.nyc.gov) for historical records. Both are free to search by address. Permit types include NB (New Building), A1 (Major Alteration), A2/A3 (Minor Alterations), and DM (Demolition). For a combined search of both DOB permit systems plus associated violations and ECB penalties, RegWatch aggregates all permit data in one lookup:

  1. Visit DOB NOW (a810-dobnow.nyc.gov) to search active permit filings, job status, and DOB NOW-era records.
  2. Visit BIS (a810-bisweb.nyc.gov) to search historical permits, older job filings, and legacy building records.
  3. For a combined view, enter any NYC address into RegWatch to see all permits from both systems with job type, status, contractor info, and linked violations.
  4. Monitor new permit filings by adding properties to your portfolio — get alerts when DOB issues new permits or changes job status.

Understanding NYC Building Permits

The NYC Department of Buildings (DOB) issues permits for virtually all construction, renovation, and demolition work in the five boroughs. RegWatch tracks permits across 2.9M+ NYC properties, combining data from DOB NOW and BIS for complete coverage. Permits range from minor alterations (Alt-3) to major new building construction (NB). Understanding a property's permit history reveals critical information about construction activity, planned renovations, and compliance status.

Traditionally, checking permit status requires navigating DOB NOW or BIS (Building Information System) — separate systems with different interfaces and data. Contractors and expediters often need to cross-reference both systems to get a complete picture.

Complete Permit Intelligence with RegWatch

RegWatch aggregates permit data from all DOB systems and presents it in a clean, filterable interface. For each property you'll see:

  • Active permits — currently open jobs with status and type
  • Historical permits — complete filing history
  • Job types — NB (New Building), A1/A2/A3 (Alterations), DM (Demolition)
  • Filing status — pre-filing, approved, issued, sign-off
  • Contractor and owner information
  • Associated violations for each permit

This is invaluable for investors evaluating development activity in a neighborhood, contractors checking on competing projects, and property owners monitoring work on adjacent buildings.

Permit Data for Due Diligence

Open permits can be a red flag during property transactions. Unpermitted work, expired permits, and outstanding DOB objections can delay closings, increase insurance costs, and create liability. Check for associated DOB violations and ECB penalties alongside permit data. RegWatch flags these issues automatically, helping attorneys and title companies identify permit-related risks before they become problems.

What You Get with RegWatch

  • Active and historical permit search
  • DOB NOW and BIS data combined
  • Job filing type and status tracking
  • Contractor and applicant details
  • Permit-violation cross-referencing
  • Construction activity monitoring
  • PDF permit reports
  • Neighborhood development tracking

Frequently Asked Questions

How do I check permits on a NYC building?

Enter any NYC address into RegWatch to see all active and historical building permits, including job type, status, and associated violations.

What do permit types (NB, A1, A2, A3) mean?

NB = New Building, A1 = Major Alteration (change use/egress/occupancy), A2 = Alteration involving multiple work types, A3 = Minor Alteration (one work type, no change of use).

Can open permits affect a property sale?

Yes. Open or expired permits may need to be resolved before closing. They can also affect title insurance and indicate unpermitted work.

Can I track construction activity in a neighborhood?

Yes. RegWatch shows permit filings for any address, making it easy to monitor development activity in specific areas.

Does RegWatch show both DOB NOW and BIS data?

Yes. RegWatch aggregates permit data from both DOB NOW (the newer system) and BIS (the legacy Building Information System) for complete coverage.

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NYC Permit Search by Address — Free DOB Lookup | RegWatch