Alteration filingAug 27
DOB filing B01423270-I1
Alteration filing at 171 Prospect Place
Approved$20,062 recorded cost
Open filing Building record · BIN 3391534
171 Prospect Place
171 Prospect Place, Brooklyn, NY 11238
A consolidated, filing-by-filing view of DOB records matched to this building identifier. The current snapshot links 1 independently sourced records, including 1 that are not recorded as completed, closed or withdrawn.
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BUILDING RECORD · BIN 3391534
171 Prospect Place
Prospect Heights, Brooklyn
A consolidated public-record view · updated Aug 27, 2026
- DOB filings
- 1
- Active-status
- 1
- Recorded addresses
- 1
A building-level summary of matched filings, active-status records and published identifiers.
Matched filings1
Open or active-status records1
First included filingJul 9, 2026
Latest recorded changeAug 27, 2026
The lot
What is already here?
The lot holds a 4-story condominium built in 1871, with 4 homes, on a 2,000 sq ft lot.
- Floors 2–4Homes4 homes are recorded on this lot — about one home to a floor, and the apartments assessed on this block run to a typical 1,449 sq ft (135 m²). The city does not publish which floor any of them is on.
- Floor 1Street levelStreet level. The lot is recorded as walk-up apartments.
- Street levelWalk-up apartments
- Homes4 recorded · typically 135 m² · valued $598,750
- Above the southern skylineFrom about floor 7 — the tallest thing within 60 m to the south is 20 m
- 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
The apartments
40 condominium apartments are assessed on this block, and the typical one is 1,449 sq ft (135 m²). They run from 67 to 260 m².
The city values the typical one at $598,750. That is the Department of Finance’s market valuation for tax, not an asking price and not a sale.
What it sold for
2 apartments on this tax block changed hands in the year the city last published, at a median of $1,310,000.
Recorded sale prices from the Department of Finance’s rolling file, covering the year to Aug 31, 2026. Transfers under $10,000 are left out: New York records deed transfers between relatives at a dollar, and those are not sales. No apartment number and no name is carried from either side.
Owner of record
PROSPECT ZELSON LLC
As the assessment roll records it. Only owners that read as a company are shown here; where the roll names an individual, nothing is published.
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 any single filing. When the rest of New York went up
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.
What is recorded here
Multiple filings, one stable building identifier.
New York City's Building Identification Number helps connect filings that may use different application numbers or describe different scopes of work. The records below are grouped because they publish BIN 3391534. They should not be read as a single construction project unless the underlying filings say so.
The matched set includes 1 alteration filing. Its latest status categories are 1 approved. Each filing page preserves its own status, dates, scope and source identifier.
- First included filing
- Jul 9, 2026
- Latest recorded change
- Aug 27, 2026
- Highest proposed story count
- Not stated
- Highest proposed unit count
- 4 dwelling units
Highest recorded values may come from different filings and must not be combined into one proposed project. Open the individual filings below for their exact scope. Values outside the publication's conservative data-quality bounds are withheld pending source review.
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Recorded history
What has happened at this address?
Every dated event the city has published for this building, from all 1 matched filings, in the order it was recorded. A date marks what entered the public record, not what happened on site.
- Alteration filed01
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. Filing B01423270-I1.
- Alteration approved02
Filing B01423270-I1 reached an approved status.
- Permit recorded for alteration03
DOB lists a first permit date for B01423270-I1. That is not by itself confirmation of activity on site.
- Alteration now approved04
The latest status recorded for B01423270-I1 is “Permit Entire.”