NYC DOB record · B01423270-I1

171 Prospect Place

171 Prospect Place, Brooklyn, NY 11238

Alteration filing in Prospect Heights, Brooklyn. The latest DOB status is permit entire.

DOB has issued the permit covering the full scope of this filing, so the work is cleared to proceed. What every status means

ApprovedAlteration filing

NYC Department of Buildings · w9ak-ipjd · accessed Sep 1, 2026 · Verify the source row

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NYC DOB RECORD · B01423270-I1

171 Prospect Place

Brooklyn, NY 11238

Alteration filing · status dated Aug 27, 2026

Current record
Approved
Proposed scale
Not stated
Dwelling units
4
Filing data portrait

A page-specific reading of the filing status, location and stated scale. Values are drawn from the cited DOB record.

Address record at a glance

What is filed at this address?

NYC DOB lists filing B01423270-I1 as a alteration filing at 171 Prospect Place, Brooklyn, NY 11238. Its latest published status category is Approved, dated Aug 27, 2026. The filing records 4 proposed dwelling units.

A filing or approval does not by itself confirm that work is underway. Proposed details may change in later DOB records.
Filing type
Alteration filing
Latest status
Approved
Latest status date
Aug 27, 2026
Proposed scale
4 proposed dwelling units
Applicant of recordSee the 22 filings that name New Air Solution INC.
FiledJul 9, 2026
Current recordApproved
Proposed scale4 units
Recorded cost$20,062

What the filing says

A public-record reading of the proposed work.

Install new split air-conditioning system serving fourth floor in an existing five-story, four-family residential building with mechanical work as per plans filed herewith. no change in use, egress or certificate of occupancy.

Street Futures classifies this record as a alteration filing based on the filing type and work flags published by the Department of Buildings. This classification helps organize the map; it does not add scope that is absent from the DOB record.

The lot this filing sits on

What is already here?

The lot holds a 4-story condominium built in 1871, with 4 homes, on a 2,000 sq ft lot.

Built
1871
Floors
4
Residential units
4
Building type
Condominium
Land use
Walk-up apartments
Zoning district
R6B
Lot area
2,000 sq ft
Building area
3,958 sq ft
Historic district
Prospect Heights Historic District

Lot facts come from NYC Department of City Planning, Primary Land Use Tax Lot Output (PLUTO) (64uk-42ks), accessed Sep 1, 2026. They describe the tax lot, not this filing.

Violation record

Are there open violations here?

No open violations are recorded for this building. 1 notice is on file, all with a recorded resolution.

Open means the agency has not recorded a resolution, which is not the same as the problem still existing. What a violation is, and what it is not. From NYC Department of Buildings, DOB Violations (3h2n-5cm9), accessed Sep 14, 2026.

Recorded timeline

Dates published by the Department of Buildings.

  1. Application filed

    DOB received filing B01423270-I1.

    01
  2. Application approved

    The application reached an approved status in the DOB record.

    02
  3. First permit date recorded

    DOB lists a first permit date. This does not by itself confirm current construction activity.

    03
  4. Current status updated

    The latest recorded filing status is “Permit Entire.”

    04

For scale: half of DOB filings are permitted within 20 days of being filed and a quarter take longer than 4 months, measured across 66,747 filings that carry both dates. How long a permit takes, by work type and borough

Scope and identifiers

The details used to match this filing.

Where a field reads “empty in the source”, the city published this filing without that value. It is not an omission on our side, and nothing here is inferred to fill a gap.

DOB filing number
B01423270-I1
BIN
3391534
BBL
3011517501
Review type
Standard Plan Examination
Existing stories
Empty in the source
Proposed stories
Empty in the source
Existing dwelling units
4
Proposed dwelling units
4
mechanical