Alteration filingNov 4
DOB filing X01366276-I1
Alteration filing at 21 Knolls Crescent
Approved1 proposed stories
Open filing Building record · BIN 2083249
21 Knolls Crescent
21 Knolls Crescent, Bronx, NY 10463
A consolidated, filing-by-filing view of DOB records matched to this building identifier. The current snapshot links 5 independently sourced records, including 5 that are not recorded as completed, closed or withdrawn.
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BUILDING RECORD · BIN 2083249
21 Knolls Crescent
Riverdale-Spuyten Duyvil, Bronx
A consolidated public-record view · updated Nov 4, 2026
- DOB filings
- 5
- Active-status
- 5
- Recorded addresses
- 1
A building-level summary of matched filings, active-status records and published identifiers.
Matched filings5
Open or active-status records5
First included filingMar 24, 2026
Latest recorded changeNov 4, 2026
The lot
What is already here?
The lot holds a 1-story store building built in 1955, on a 27,700 sq ft lot.
- Floor 1Street levelStreet level. The lot is recorded as commercial and office, so this floor is where the commercial space is.
- Street levelCommercial and office
- Above the southern skylineFrom about floor 24 — the tallest thing within 60 m to the south is 71.3 m
- Built
- 1955
- Last altered
- 2019
- Floors
- 1
- Residential units
- 0
- Building type
- Store building
- Land use
- Commercial and office
- Zoning district
- R6A
- Lot area
- 27,700 sq ft
- Building area
- 14,522 sq ft
The apartments
146 condominium apartments are assessed on this block, and the typical one is 861 sq ft (80 m²). They run from 73 to 168 m².
The city values the typical one at $107,283. That is the Department of Finance’s market valuation for tax, not an asking price and not a sale.
What it sold for
26 apartments on this tax block changed hands in the year the city last published, at a median of $196,011, from 74,000 to 655,000.
Recorded sale prices from the Department of Finance’s rolling file, covering the year to Sep 30, 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
KNOLLS COOP SECT I 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
Violation record
Are there open violations here?
The Department of Buildings has 6 open notices on record for this building, out of 8 notices on file; the most recent was issued Nov 14, 2025.
- Low pressure boiler
Issued Nov 14, 2025 — VIOLATION ISSUED-FAILURE TO FILE 2024 EXTERNAL LOW PRESSURE INSPECTION
- Low pressure boiler
Issued Sep 23, 2024 — VIOLATION ISSUED-FAILURE TO FILE 2023 EXTERNAL LOW PRESSURE INSPECTION
- Low pressure boiler
Issued Jun 30, 2023 — VIOLATION ISSUED-FAILURE TO FILE 2020 EXTERNAL LOW PRESSURE INSPECTION
3 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 Nov 5, 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 2083249. They should not be read as a single construction project unless the underlying filings say so.
The matched set includes 5 alteration filing. Its latest status categories are 5 approved. Each filing page preserves its own status, dates, scope and source identifier.
- First included filing
- Mar 24, 2026
- Latest recorded change
- Nov 4, 2026
- Highest proposed story count
- 1 stories
- Highest proposed unit count
- Not stated
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 5 matched filings, in the order it was recorded. A date marks what entered the public record, not what happened on site.
- Alteration filed01
General construction for partial reconstruction of retaining wall as per plans filed herewith. no change in use, egress or occupancy. Filing X01366276-I1.
- Alteration approved02
Filing X01366276-I1 reached an approved status.
- Alteration filed03
Filing plumbing work type in conjucton with alt# x01391144-i1: installtion of 10 plumbing fixtures & elctric cooking equipment as per plans submitted. no change o use, egress or occopancy. Filing X01391144-S1.
- Alteration filed04
Interior renovation in an exist: retrail store food market: non- bearing minor portitions, refregeration equipments, coooking equpments, 8ft ss hood, exhust fan and repear the floor as per plans. nochane of use egress or occupancy. Filing X01391144-I1.
- Alteration approved05
Filing X01391144-I1 reached an approved status.
- Permit recorded for alteration06
DOB lists a first permit date for X01391144-I1. That is not by itself confirmation of activity on site.
- Alteration approved07
Filing X01391144-S1 reached an approved status.
- Permit recorded for alteration08
DOB lists a first permit date for X01391144-S1. That is not by itself confirmation of activity on site.
- Alteration filed09
Filing plumbing work type in conjucton with alt# x01391144-i1: installtion of 10 plumbing fixtures & elctric cooking equipment as per plans submitted. no change o use, egress or occopancy. Filing X01391144-P1.
- Alteration filed010
Interior renovation in an exist: retrail store food market: non- bearing minor portitions, refregeration equipments, coooking equpments, 8ft ss hood, exhust fan and repear the floor as per plans. nochane of use egress or occupancy. Filing X01391144-P2.
- Alteration approved011
Filing X01391144-P1 reached an approved status.
- Alteration now approved012
The latest status recorded for X01391144-P1 is “Approved.”
- Alteration approved013
Filing X01391144-P2 reached an approved status.
- Alteration now approved014
The latest status recorded for X01391144-P2 is “Approved.”
- Alteration now approved015
The latest status recorded for X01391144-S1 is “Permit Entire.”
- Alteration now approved016
The latest status recorded for X01391144-I1 is “Permit Entire.”
- Permit recorded for alteration017
DOB lists a first permit date for X01366276-I1. That is not by itself confirmation of activity on site.
- Alteration now approved018
The latest status recorded for X01366276-I1 is “Permit Entire.”