Additions and square-footage expansions permitted in New York City. These are the largest residential projects a homeowner undertakes and carry the highest declared values.
25 permits listed
$12,325,606 declared value
NYC Open Data source
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Recent permits
349 EAST 140 STREET (BRONX)$1,440,501
Filing for the renovation and addition to a community facility building.
Issued 2026-10-29 · addition alteration · issued
55 LA SALLE STREET (STATEN ISLAND)$1,260,086
PROPOSED 1 STORY ADDITION WITH MEZZANINE TO ENLARGE EXISTING LOBBY. GENERAL CONSTRUCTION, STRUCTURAL REINFORCEMENTS AND FOUNDATION FOOTINGS PER PLANS FILED.
Issued 2026-10-23 · other · issued
202 ADELPHI STREET (BROOKLYN)$1,070,523
CONVERSION OF THREE-STORY PLUS BASEMENT HOUSE FROM A FOUR-FAMILY TO ONE-FAMILY USE. RENOVATIONS, ADD TWO-STORY REAR EXTENSION AT WEST FACADE, NEW OPENING FOR NEW HISTORIC DOOR, NEW BROWNSTONE STOOP, NEW BROWNSTONE CLAD A
Issued 2026-10-23 · addition alteration · issued
350 LINWOOD STREET (BROOKLYN)$1,025,320
Providing full accessibility to the school. Work includes Auditorium ramp renovation, front entrance concrete renovation, bathroom renovations, and the addition of an area of rescue on all floors.
Issued 2026-10-27 · addition alteration · issued
606 WEST 120 STREET (MANHATTAN)$1,007,643
interior alteration to existing Barnard offices, addition of classroom use and occupancy. This is accessory to the college. No change in egress
Issued 2026-10-28 · addition alteration · issued
123 NORTH 4 STREET (BROOKLYN)$905,114
PROPOSED VERTICAL ENLARGEMENT TO ADD ONE ADDITIONAL FLOOR TO AN EXISTING 3 STORY BUILDING.
Issued 2026-10-26 · addition alteration · issued
512 WEST 181 STREET (MANHATTAN)$817,159
Alteration application hereby filed for Renovation of an Existing Commercial building including vertical enlargement of additional floor in accordance with submitted plans, specifications and details.
Issued 2026-10-28 · addition alteration · issued
1213 EAST 23 STREET (BROOKLYN)$670,207
Addition at all floors
Issued 2026-10-29 · addition alteration · issued
419 CLERMONT AVENUE (BROOKLYN)$618,086
PROPOSED INTERIOR ALTERATIONS INCLUDING REAR EXPANSION AND ROOFTOP ADDITION.
Issued 2026-10-29 · addition alteration · issued
350 LINWOOD STREET (BROOKLYN)$528,080
Removing and replacing existing plumbing fixtures and piping to accommodate ADA plumbing fixtures. Installing one new ADA adult toilet. Adding additional drinking fountains and drinking fountain/bottle filler combination
Issued 2026-10-27 · plumbing · issued
309 COLUMBUS AVENUE (MANHATTAN)$479,550
Additional amended work: Replace front and rear parapet walls, recover associated roofing.
Issued 2026-10-27 · addition alteration · issued
3117 AVENUE W (BROOKLYN)$415,927
Full renovation of existing library. New floor, new bookshelves/millwork, adding soffits. Slight modification to existing ductwork. Additional electrical receptacles added throughout.
Issued 2026-10-21 · addition alteration · issued
191 CARLTON AVENUE (BROOKLYN)$279,200
STRUCTURAL WORK FILED IN CONJUNCTION WITH CONVERSION OF EXISTING BUILDING FROM 3- TO 1-FAMILY INCLUDING 1-STORY REAR ADDITION AT BASEMENT. CREATE OPENING IN EXISTING REAR FACADE. INSTALL STRUCTURAL FRAMING PER PLANS. FOU
Issued 2026-10-27 · addition alteration · issued
225 WEST 34 STREET (MANHATTAN)$223,500
APPLICATION FILED FOR MECHANICAL ADDITIONS/MODIFICATIONS ON THE 18TH FLOOR (T&M SECURITY) AS PER PLANS FILED HEREWITH. NO CHANGE IN USE, EGRESS, OR OCCUPANCY.
Issued 2026-10-26 · mechanical · issued
28-90 REVIEW AVENUE (QUEENS)$220,000
Modifications to existing Mechanical systems as per plans filed herewith. Addition of 12 supplemental VRF evaporators, 1 airside condensing unit. No change to use, egress or occupancy.
Issued 2026-10-30 · mechanical · issued
60-40 75 STREET (QUEENS)$220,000
- INTERIOR RENOVATION ON THE BASEMENT AND FIRST FLOOR OF TWO FAMILY BUILDING AND ADD NON COMBUSTABLE REAR DECK AS PER PLAN. NO CHANGE IN USE, OCCUPANCY OR EGRESS
Issued 2026-10-30 · addition alteration · issued
262 EAST 4 STREET (BROOKLYN)$194,000
GENERAL CONSTRUCTION WORK WILL INCLUDE INTERIOR RENOVATION, PARTIAL EXTERIOR RENOVATION, REMOVAL AND ADDITION OF NON-STRUCTURAL PARTITIONS. RECONSTRUCT REAR PORTION OF ATTIC TO RAISE HEIGHT CEILING. NO CHANGE IN USE, EGR
Issued 2026-10-29 · addition alteration · issued
1221 AVENUE OF THE AMERICAS (MANHATTAN)$162,000
Minor interior demolition - removal of escalator between C2 & C1. Install interior partitions, finishes and patch ceilings for retail addition on the Cellar (CO)/ C1 Level (Mktg) as per plans (Rock Group - C1 South)
Issued 2026-10-23 · addition alteration · issued
118 EAST 95 STREET (MANHATTAN)$150,000
FOUNDATIONS FOR NEW PROPOSED CELLAR ADDITION TO EXISTING 4-STORY RESIDENTIAL BUILDING. THE PROPOSED SOE WORK INCLUDES ROCK STABILIZATION FOR THE EXCAVATION OF A NEW CELLAR, WHICH IS PART OF THE PROPOSED RENOVATION OF THE
Issued 2026-10-26 · other · issued
928 2 AVENUE (MANHATTAN)$129,960
Commercial space interior renovation. Update existing kitchen exhaust, add new kitchen equipment & interior renovation as mark on the proposed plans. Cellar not to be use for occupancy, only storage to be allowed.
Issued 2026-10-22 · addition alteration · issued
500 WEST 33 STREET (MANHATTAN)$120,000
Modification/addition to existing HVAC and associated ductwork/piping as shown on drawings. No change in use, egress or occupancy.
Issued 2026-10-30 · mechanical · issued
630 PARK AVENUE (MANHATTAN)$106,750
Mechanical additions as per plans filed herewith. No change to use, egress or occupancy is proposed.
Issued 2026-10-28 · mechanical · issued
98-20 ASTORIA BOULEVARD (QUEENS)$100,000
REPAIR OF THE EXISTING EXTERIOR BRICK WALL AND CONSTRUCTION OF A NEW THIRD-FLOOR ADDITION
Issued 2026-10-29 · addition alteration · issued
191 CARLTON AVENUE (BROOKLYN)$98,000
MECHANICAL WORK FILED IN CONJUNCTION WITH CONVERSION OF EXISTING BUILDING FROM 3- TO 1-FAMILY INCLUDING 1-STORY REAR ADDITION. INSTALL SPLIT NEW HVAC SYSTEM, DUCTWORK AND DIFFUSERS. INSTALL TOILET, KITCHEN AND DRYER EXHA
Issued 2026-10-27 · mechanical · issued
35 EAST 75 STREET (MANHATTAN)$84,000
APPLICATION FILED FOR MECHANICAL ADDITIONS/MODIFICATIONS ON THE 17TH FL & ROOF (SUITE PHE) AS PER PLANS FILED HEREWITH. NO CHANGE IN USE, EGRESS, OR OCCUPANCY.
Issued 2026-10-23 · mechanical · issued
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