Alteration filingNov 4
DOB filing B01363611-I1
Alteration filing at 12 Martense Street
Recorded as completed4 proposed stories
Open filing Building record · BIN 3116854
12 Martense Street
12 Martense Street, Brooklyn, NY 11226
A consolidated, filing-by-filing view of DOB records matched to this building identifier. The current snapshot links 1 independently sourced records, including 0 that are not recorded as completed, closed or withdrawn.
newyorkdailyStreet Futures
BUILDING RECORD · BIN 3116854
12 Martense Street
Flatbush, Brooklyn
A consolidated public-record view · updated Nov 4, 2026
- DOB filings
- 1
- Active-status
- 0
- Recorded addresses
- 1
A building-level summary of matched filings, active-status records and published identifiers.
Matched filings1
Open or active-status records0
First included filingJun 17, 2026
Latest recorded changeNov 4, 2026
The lot
What is already here?
The lot holds a 4-story walk-up apartment building built in 1925, with 20 homes, on a 6,000 sq ft lot.
- Floors 2–4Homes20 homes are recorded on this lot — about 7 homes to a floor, and the apartments assessed on this block run to a typical 705 sq ft (65 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
- Homes20 recorded · typically 65 m² · valued $143,123
- Above the southern skylineFrom about floor 8 — the tallest thing within 60 m to the south is 21.2 m
- Built
- 1925
- Floors
- 4
- Residential units
- 20
- Building type
- Walk-up apartment building
- Land use
- Walk-up apartments
- Zoning district
- R7A
- Lot area
- 6,000 sq ft
- Building area
- 18,240 sq ft
The apartments
16 condominium apartments are assessed on this block, and the typical one is 705 sq ft (65 m²). They run from 46 to 105 m².
The city values the typical one at $143,123. That is the Department of Finance’s market valuation for tax, not an asking price and not a sale.
Owner of record
MIDWOOD ACTIVITIES INC
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 Nov 7, 2026. They describe the tax lot, not any single filing. When the rest of New York went up
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 3116854. 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 recorded as completed. Each filing page preserves its own status, dates, scope and source identifier.
- First included filing
- Jun 17, 2026
- Latest recorded change
- Nov 4, 2026
- Highest proposed story count
- 4 stories
- Highest proposed unit count
- 20 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.
Address alerts
Watch this address.
Get an email when NewYorkDaily detects a material change in the public DOB records associated with 12 Martense Street.
Confirmation is required. Alerts describe source-data changes, not confirmed construction activity. Unsubscribe at any time. Privacy
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
Replace existing 7' high retaining wall. Filing B01363611-I1.
- Alteration approved02
Filing B01363611-I1 reached an approved status.
- Permit recorded for alteration03
DOB lists a first permit date for B01363611-I1. That is not by itself confirmation of activity on site.
- Alteration signed off04
DOB recorded a sign-off for B01363611-I1.
- Alteration now completed05
The latest status recorded for B01363611-I1 is “LOC Issued.”