Alteration filingSep 1
DOB filing B01050481-I1
Alteration filing at 209 Underhill Avenue
Approved$59,999 recorded cost
Open filing Building record · BIN 3324389
209 Underhill Avenue
209 Underhill Avenue, Brooklyn, NY 11238
A consolidated, filing-by-filing view of DOB records matched to this building identifier. The current snapshot links 6 independently sourced records, including 3 that are not recorded as completed, closed or withdrawn.
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BUILDING RECORD · BIN 3324389
209 Underhill Avenue
Prospect Heights, Brooklyn
A consolidated public-record view · updated Sep 1, 2026
- DOB filings
- 6
- Active-status
- 3
- Recorded addresses
- 1
A building-level summary of matched filings, active-status records and published identifiers.
Matched filings6
Open or active-status records3
First included filingFeb 15, 2018
Latest recorded changeSep 1, 2026
The lot
What is already here?
The lot holds a 6-story elevator apartment building built in 1912, with 72 homes, on a 15,458 sq ft lot.
- Floors 2–6Homes72 homes are recorded on this lot — about 14 homes to a floor. The city does not publish which floor any of them is on.
- Floor 1Street levelStreet level. The lot is recorded as elevator apartments.
- Street levelElevator apartments
- Homes72 recorded on the lot
- Above the southern skylineFrom about floor 8 — the tallest thing within 60 m to the south is 21.4 m
- Built
- 1912
- Floors
- 6
- Residential units
- 72
- Building type
- Elevator apartment building
- Land use
- Elevator apartments
- Zoning district
- R8X
- Lot area
- 15,458 sq ft
- Building area
- 67,680 sq ft
What it sold for
6 apartments on this tax block changed hands in the year the city last published, at a median of $1,094,619, from 635,000 to 4,350,000.
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.
Lot facts come from NYC Department of City Planning, Primary Land Use Tax Lot Output (PLUTO) (64uk-42ks), accessed Sep 4, 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?
The Department of Buildings has 8 open notices on record for this building, out of 40 notices on file; the most recent was issued Aug 1, 2024.
- Failure to correct swarmp conditions (facade)
Issued Aug 1, 2024 — FAILURE TO CORRECT SWARMP CONDITIONS
- Hazardous condition (facade)
Issued Feb 21, 2024 — CYCLE 9C UNSAFE REPORT FILED
- No report and / or late filing (facade)
Issued Apr 30, 2019 — FAILED TO FILE FISP CYCLE 8C TECHNICAL REPORT BY 02/21/2019
5 further open notices are on file. Open the source dataset for the full list.
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 21, 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 3324389. They should not be read as a single construction project unless the underlying filings say so.
The matched set includes 6 alteration filing. Its latest status categories are 3 approved, 3 recorded as completed. Each filing page preserves its own status, dates, scope and source identifier.
- First included filing
- Feb 15, 2018
- Latest recorded change
- Sep 1, 2026
- Highest proposed story count
- Not stated
- Highest proposed unit count
- 72 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 6 matched filings, in the order it was recorded. A date marks what entered the public record, not what happened on site.
- Alteration filed01
Modification to existing at&t telecommunications site. replace antennas with related rrh units and install rrh units on roof. all in conformance with tppn 5/98. no change in use, egress or occupancy. Filing B00018229-I1.
- Alteration approved02
Filing B00018229-I1 reached an approved status.
- Permit recorded for alteration03
DOB lists a first permit date for B00018229-I1. That is not by itself confirmation of activity on site.
- Alteration signed off04
DOB recorded a sign-off for B00018229-I1.
- Alteration filed05
Installation of NYC DEP antenna site. Install (2) new antennas on the bulkhead facade, Install (1) DCU equipment cabinet on roof at bulkhead facade and related solar panel mounted to bulkhead facade No change in use, egress or occupancy. Filing B00279842-I1.
- Alteration approved06
Filing B00279842-I1 reached an approved status.
- Alteration filed07
Proposed installation of heavy duty sidewalk shed for remedial repairs as per plans. no change in use occupancy or egress under this application. live load 300 per square feet. sidewalk shed shall comply with chapter # 33 of the 2014 code. Filing B00308048-I1.
- Alteration approved08
Filing B00308048-I1 reached an approved status.
- Alteration filed09
Modification to existing VERIZON telecommunications site. Install 1 new antenna sector (3 antennas and 3 RRH units), relocate 1 existing antenna sector, replace 2 existing antennas and 2 RRH units, add 2 new antennas and 2 RRH units, relocate 2 existing GPS units, install 1 new equipment cabinet, and extend the existing platform on the roof. All work in conformance with TPPN#5/98. No change in use, egress, or occupancy. Filing B00069771-I1.
- Alteration approved010
Filing B00069771-I1 reached an approved status.
- Permit recorded for alteration011
DOB lists a first permit date for B00069771-I1. That is not by itself confirmation of activity on site.
- Alteration filed012
Modification of existing AT&T site. Replace 6 antenna on roof. Install 3 RRHs on roof. Replace 1 equipment cabinet & retrofit 1 equipment cabinet on equipment platform on roof. All in conformance with TPPN 5/98. No change in use, egress or occupancy. Filing B00343714-I1.
- Alteration approved013
Filing B00343714-I1 reached an approved status.
- Permit recorded for alteration014
DOB lists a first permit date for B00279842-I1. That is not by itself confirmation of activity on site.
- Permit recorded for alteration015
DOB lists a first permit date for B00343714-I1. That is not by itself confirmation of activity on site.
- Permit recorded for alteration016
DOB lists a first permit date for B00308048-I1. That is not by itself confirmation of activity on site.
- Alteration now approved017
The latest status recorded for B00279842-I1 is “Permit Entire.”
- Alteration now completed018
The latest status recorded for B00018229-I1 is “LOC Issued.”
- Alteration signed off019
DOB recorded a sign-off for B00343714-I1.
- Alteration now completed020
The latest status recorded for B00343714-I1 is “LOC Issued.”
- Alteration signed off021
DOB recorded a sign-off for B00069771-I1.
- Alteration now completed022
The latest status recorded for B00069771-I1 is “LOC Issued.”
- Alteration filed023
AT&T - Installation of non-emergency gas fired generator as per plans (10074145). No change to use, egress or occupancy. Filing B01050481-I1.
- Alteration now approved024
The latest status recorded for B00308048-I1 is “Permit Entire.”
- Alteration approved025
Filing B01050481-I1 reached an approved status.
- Permit recorded for alteration026
DOB lists a first permit date for B01050481-I1. That is not by itself confirmation of activity on site.
- Alteration now approved027
The latest status recorded for B01050481-I1 is “Permit Entire.”