20 West 77th Street, Manhattan
Co-op · 31 units · built c. 1925 · Block 1129, Lot 45.
Building permits
- Alteration, filed Jun 11, 2026, estimated cost $70K, described as “Install new central ac system for heating and cooling apartment 15A”
- Alteration, filed Jun 11, 2026, estimated cost $225K, described as “Herewith file plans to renovate Apt. 15A. Removal and construction of partitions and finishes. No change to use egress or occupancy.”
- Alteration, filed Jun 11, 2026, estimated cost $39K, described as “Herewith file plans to renovate apt. 15A. Replace kitchen and bathroom plumbing fixtures. Add new W/D. No change to use, egress or occupancy.”
- Alteration, filed May 22, 2024, estimated cost $108K, described as “Minor renovation of unit 3A. No change in use, egress or occupancy”
- Alteration, filed Nov 16, 2023, estimated cost $36K, described as “Installation of two new bathrooms, pantry sink, dishwasher and washing machine. as per plans.”
- Alteration, filed Nov 16, 2023, estimated cost $23K, described as “Installation of one split system air conditioning unit, two bathroom exhaust fans and one electric dryer exhaust vent with associated ducting as per plans.”
- Alteration, filed Nov 9, 2023, estimated cost $141K, described as “Alt 2 filing for the combination of two class A apartments on the 5th floor per TPPN 3/1997. No change to use, bulk or egress.”
- Alteration, filed Nov 9, 2023, estimated cost $4K, described as “Creating one masonry opening below an existing window for a new AC condenser as per plans.”
- Alteration, filed Jul 27, 2022, estimated cost $11K, described as “Installation of 3 PTAC systems”
- Alteration, filed Jul 25, 2022, estimated cost $24K, described as “Renovation of 1.5 bathrooms and kitchen”
- Alteration, filed Jul 25, 2022, estimated cost $110K, described as “Renovation and construction of kitchen, bathroom and powder room with minor non-structural partition work. No change to use, egress, or occupancy.”
- Alteration, filed Jun 24, 2022, estimated cost $7K, described as “Filing herewith drawings to install new exhaust ducts for proposed dryers & replace with new entrance door. This application does not require a new or amended certificate of occupancy as there is no change in use, egress or occupancy.”
- Alteration, filed Jun 24, 2022, estimated cost $21K, described as “Hereby filing this application to propose a new laundry room located in the cellar as an accessory use to the building as per plans submitted. This app does not require a new or amended cert. Of occupancy as there is no change in use,…”
- Alteration, filed Jan 11, 2022, described as “Installation of temporary supported scaffold per plan submitted. Work shall comply with 2014 building codes chapter 33. No change in use, egress and/or occupancy with this application.”
- Alteration, filed Jan 11, 2022, described as “Installation of temporary heavy duty sidewalk shed per plan submitted. Work shall comply with 2014 building codes chapter 33. No change in use, egress and/or occupancy with this application.”
- Alteration, filed Nov 2, 2021, estimated cost $262K, described as “Terracotta repair & replacement, stone repairs, brick repairs & replacement, brick & terracotta re-pointing. No change in use, egress or occupancy.”
- Alteration, filed Apr 21, 2021, estimated cost $63K, described as “Interior renovation of the kitchen and bathroom area at the existing apartment #12A on the 12TH floor including minor framing and plumbing work. No change to use, occupancy, or egress. The plumbing has been filed in DOB now under job…”
- Alteration, filed Apr 20, 2021, estimated cost $10K, described as “Plumbing work filed in conjunction with the renovation in the apartment 12A on the 12TH floor. No change of use, occupancy or egress. Gc worktype has been filed on DOB now under job #M00502627”
- Alteration, filed Feb 9, 2021, estimated cost $10K, described as “Install new plumbing fixtures and modify existing fixtures in apartment 11B as per plan. No change to use, egress or occupancy under this application.”
- Alteration, filed Feb 28, 2020, estimated cost $1K, described as “Installation of temporary 163' high pipe scaffold originating (off grade) for facade repair work as per plan. No change in use egress or occupancy, pipe scaffold shall comply with chapter# 33 of 2014 the ny building code.”
- Alteration, filed Jan 28, 2020, estimated cost $60K, described as “Filing for pl work in conjunction with arch work filed at borough for 5th floor”
- Alteration, filed Jan 28, 2020, estimated cost $35K, described as “Filing to install 2 new HVAC thru wall units at rear court yard 5th floor, install new kitchen vent & bathroom vent. PLEASE NOTE Partial demolition (for 2 new small openings in facade for a& c units) Is filed under Architectural…”
- Alteration, filed Sep 13, 2019, estimated cost $10K, described as “Enlarge window openings at apartment 16A on penthouse. No change to occupancy use or egress under this application.”
- Alteration, filed Sep 13, 2019, estimated cost $15K, described as “Install HVAC unit for apartment 16 A. No change to occupancy use or egress under this application.”
- Alteration, filed Sep 13, 2019, estimated cost $19K, described as “Plumbing work for Penthouse Apartment . No change to occupancy use or egress.”
Property taxes
- Assessment
- $6,968,250
- 2026–27 tax
- $697,512
- Market value (city estimate)
- $15,485,000
- Taxable value
- $6,505,470
- Assessed land
- $1,557,000
- Assessed improvements
- $5,411,250
Tax breaks
- Co-op and condo abatement, with no end date, a $111,885 credit this tax year.
Zoning
R10A: floor area ratio 11.50 built, above the 10.00 base zoning allows, which bonuses, transfers or older rules can permit.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Jun 10, 2026: $1,800,000
- Jan 8, 2026: $2,975,000
- Dec 18, 2025: $2,900,000
- Sep 4, 2025: $2,950,000
- Apr 25, 2024: $1,880,000
- Aug 29, 2023: $4,275,000
- May 30, 2023: $2,637,500
- May 25, 2023: $1,125,000
- May 2, 2023: $1,560,000
- Oct 12, 2021: $1,495,000
The 10 most recent of 17 open-market sales since 2016, from the Department of Finance’s sales files.
Landmarks
Part of Upper West Side/Central Park West Historic District (Historic District). 49 Landmarks Preservation Commission permits are on file.