51 20th Street, Brooklyn
Industrial · built 2022 · Block 635, Lot 13.
Building permits
- New Building — Non-residential, filed Oct 31, 2022, 2 stories, described as “Construct new 2 story warehouse building as per plans filed”
- Alteration, filed Aug 17, 2026, estimated cost $3K, described as “Use of telehandler for SOE and foundation construction. This application is filed in conjunction with NB B08029013-I1”
- Alteration, filed Apr 15, 2026, estimated cost $100K, described as “Installation of temporary bracing as per plans filed herewith. This application is filed in conjunction with NB B08029013-I1.”
- Alteration, filed Jan 11, 2026, estimated cost $45K, described as “Installation of 150PSF light duty overhead protection shed as per plans. Shed shall comply with chapter #33 of the 2022 code. No change in use, egress or occupancy under this application.”
- Alteration, filed Dec 17, 2025, estimated cost $10K, described as “Install plywood construction fence for demolition operations”
- Alteration, filed Nov 25, 2025, estimated cost $20K, described as “Installation of construction fence for new building construction as per plans. No change in use occupancy or egress under this application. Construction fence shall comply with chapter 33 of the 2022 NYC building code.”
- Alteration, filed Mar 10, 2025, estimated cost $40K, described as “Installation of a temporary construction fence per plan submitted. Work shall comply with 2022 building codes chapter 33. No change in use, egress and/or occupancy with this application.”
- Alteration, filed Feb 25, 2025, estimated cost $10K, described as “Filing herewith non structural interior demolition application for the removal of interior sprinkler system prior to Demolition (Fed Ex). No change to use, egress, or occupancy.”
- Alteration, filed Jan 20, 2025, estimated cost $40K, described as “Remove interior partitions and finishes as per plans filed. no change in use egress or occupancy”
- Alteration, filed Jan 8, 2025, estimated cost $10K, described as “Install plywood construction fence for demolition operations”
- Alteration, filed Jan 8, 2025, estimated cost $7K, described as “Install plywood construction fence for demolition operations”
- Alteration, filed Nov 8, 2024, estimated cost $100K, described as “Installation of construction fence for new building construction as per plans. No change in use occupancy or egress under this application. Construction fence shall comply with chapter 33 of the 2022 NYC building code.”
- Alteration, filed Nov 7, 2024, estimated cost $83K, described as “Installation of sacrificial drilled test piles as per plans. No change in use, occupancy or egress under this application.”
- Alteration, filed Oct 2, 2024, estimated cost $14K, described as “Erect an illuminated business accessory wall sign. No change in use, egress, or occupancy”
- Alteration, filed Oct 2, 2024, estimated cost $14K, described as “Erect an illuminated business accessory wall sign. No change in use, egress, or occupancy”
- Alteration, filed Aug 16, 2024, estimated cost $3K, described as “Installation of a temporary construction fence per plan submitted. Work shall comply with 2022 building codes chapter 33. No change in use, egress and/or occupancy with this application.”
- Alteration, filed Jul 22, 2024, estimated cost $95K, described as “Provide sprinkler coverage under areas of obstructed coverage due to installation of new equipment. No change to use, occupancy or egress”
- Alteration, filed May 6, 2024, estimated cost $1.7M, described as “General construction for wall replacement as per plans filed”
- Alteration, filed May 6, 2024, estimated cost $1K, described as “Structural filing for reconstruction of party wall”
- Alteration, filed Apr 12, 2024, estimated cost $1K, described as “Site Grading for pole crib area as per plans filed”
- Alteration, filed Jan 23, 2024, estimated cost $1K, described as “Mechanical filing as per plans filed”
- Alteration, filed Jan 17, 2024, estimated cost $75K, described as “Installation of material handling system in existing warehouse as per plans filed”
- Alteration, filed Nov 14, 2023, estimated cost $1K, described as “Site Grading as per plans filed”
- Alteration, filed Nov 8, 2023, estimated cost $2K, described as “Sprinkler work as per plans filed. Filed in conjunction with new building #321592503”
- Alteration, filed Nov 8, 2023, estimated cost $1K, described as “Plumbing work as per plans filed. Filed in conjunction with new building #321592503”
29 more, older permits are in this building’s full list on the map.
Property taxes
- Assessment
- $15,963,300
- 2026–27 tax
- $1,731,025
- Market value (city estimate)
- $35,474,000
- Taxable value
- $15,957,087
- Assessed land
- $2,485,350
- Assessed improvements
- $13,477,950
Zoning
M3-1: floor area ratio 0.78 built, 2.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone AE, high risk: a 1% chance of flooding each year, base flood elevation 10 ft (NGVD29). FEMA’s preliminary map: zone AE, high risk: a 1% chance of flooding each year, base flood elevation 12 ft (NAVD88).
Recent sales
- Dec 28, 2023: $248,000,000
- Jan 10, 2019: $214,200,000
Open-market sales since 2016, from the Department of Finance’s sales files.
Board and land use applications
- BROOKLYN SIGN SHOP (City Planning P1994K0025): Completed, decided Oct 25, 1994. SITE SELECTION & ACQUISITION TO RELOCATE THE DOT BROOKLYN*SIGN SHOP TO BLDG C WITHIN THE SUNSET INDUSTRIAL PARK