4801 10th Avenue, Brooklyn
Hospital · built c. 1935 · Block 5632, Lot 1.
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Building permits
- Alteration, filed Dec 23, 2025, estimated cost $225K, described as “Removal of interior non-bearing partitions and related finishes as per drawings. No change in use, egress or occupancy.”
- Alteration, filed Dec 23, 2025, estimated cost $945K, described as “Removal of interior non-bearing partitions and related finishes as per drawings filed herewith. No change in use, egress or occupancy.”
- Alteration, filed Dec 4, 2025, estimated cost $100K, described as “New generator, fuel oil pump package, and associated piping and controls. Inconjunction with gc application - DOB now #: B00930014 and mechnical appliation - dobnow #: B00914128-I1.”
- Alteration, filed Nov 19, 2025, estimated cost $1.8M, described as “The installation of new chillers and connect to existing condenser water and chilled water mains. Include new 4" housekeeping pads.”
- Alteration, filed Jul 7, 2025, estimated cost $200K, described as “General construction work filed for interior renovation to reconfigure a portion of the 4th, 5TH and 6TH floor for ep labs. Work included general construction, plumbing, sprinkler, structural, and mechanical. No changes to use, egress and…”
- Alteration, filed Jul 1, 2025, estimated cost $20K, described as “Sprinkler application in conjunction with general construction application. B00930014”
- Alteration, filed Feb 27, 2025, estimated cost $187K, described as “Create new insulated metal panel mechanical bulkhead supported on new dunnage below the existing cooling tower for new mechanical equipment at 9th floor mechanical roof terrace. No change in use, occupancy or means of egress under this…”
- Alteration, filed Oct 30, 2024, estimated cost $85K, described as “Demolition and removal of existing air handlers and all associated ductwork, piping, and accessories within mechanical room. New replacement air handlers, ductwork, piping and accessories installed on roof with connections to existing…”
- Alteration, filed Oct 15, 2024, estimated cost $655K, described as “Structural work related to support of new mechanical equipment located at the 9th floor roof level”
- Alteration, filed Jan 21, 2024, described as “Suspended scaffold installation and use as per plans filed herewith.”
- Alteration, filed Nov 8, 2023, estimated cost $35K, described as “Filing for generator installation”
- Alteration, filed Oct 11, 2023, estimated cost $320K, described as “Alteration application to do interior fit out to accommodate generator.”
- Alteration, filed Oct 11, 2023, estimated cost $65K, described as “Provide new generator on roof of aron pavilion serving kronish building. Provide pathways for electrical and fuel oil piping as shown.provide acoustical partition and skylights in penthouse. No change in use, occupancy or means of egress…”
- Alteration, filed Aug 17, 2023, estimated cost $192K, described as “Alteration application to do interior demolition to create raceways for piping for generator piping.”
- Alteration, filed Jul 26, 2023, estimated cost $642K, described as “Alteration application to do interior demolition to create raceways for generator piping.”
- Alteration, filed Jul 28, 2021, estimated cost $2.5M, described as “Interior renovation on cellar and basement of medical building. no change to use, egress nor occupancy”
- Alteration, filed Jul 20, 2021, estimated cost $50K, described as “Replacement of air conditioning unit on the roof”
- Alteration, filed Jul 19, 2021, estimated cost $508K, described as “Plumbing and sprinkler application in conjunction with alteration application”
- Alteration, filed Jul 19, 2021, estimated cost $664K, described as “Mechanical work in conjunction with renovation application”
- Alteration, filed Jul 16, 2021, estimated cost $854K, described as “Plumbing AND SPRINKLER work”
- Alteration, filed Jul 5, 2021, estimated cost $357K, described as “Mechanical work”
- Alteration, filed Jun 14, 2021, estimated cost $893K, described as “Structural application”
- Alteration, filed Jun 10, 2021, estimated cost $2.7M, described as “Interior renovation”
- Alteration, filed May 28, 2021, estimated cost $4.2M, described as “Structural application on the interior of the building. no change to use, egress or occupancy”
- Alteration, filed May 28, 2021, estimated cost $2.6M, described as “Interior renovation of existing floor. no change to use,egress nor occupancy”
14 more, older permits are in this building’s full list on the map.
Property taxes
- Assessment
- $85,481,100
- Assessed land
- $914,850
- Assessed improvements
- $84,566,250
Tax breaks
- Nonprofit exemption (hospital), with no end date, about $9,272,990 a year below the full tax.
Zoning
R6: floor area ratio 5.12 built, above the 2.43 base zoning allows, which bonuses, transfers or older rules can permit.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Board and land use applications
- Maimonides Medical Center Modification (City Planning 2019K0339): Authorization, Completed, filed Jul 4, 2019, decided Oct 14, 2020. This is a private application by Maimonides Medical Center requesting a minor modification to a previously approved Large-Scale Community Facility Development site plan to facilitate 6,464.44 sf of new community facility development across…
- Variance or special permit (Board of Standards and Appeals 262-02-BZ): Variance or special permit, Granted, filed Sep 26, 2002, decided Jan 7, 2003. Variance (§72-21) to permit the proposed erection of a nine story (L1+8) building, within the medical center community facility development, located in an R6 and a C1-3 zoning district, which does not comply with the zoning requirements…
- Maimonides Medical Center (City Planning P2013K0028): Completed, decided Jun 19, 2014. Amendment to a Large Scale Special Permit for Maimonides Medical Center in Brooklyn Community District 12.