Manhattan · Flatiron and Chelsea
Office buildings on West 21st Street
13 large office buildings on West 21st Street in Manhattan, from 1-3 West 21st Street to 511-519 West 21st Street, with about 1.1 million square feet of office space, through Flatiron and Chelsea. In address order, with each building's size, age, last sale and nearest subway from the city's own records.
- Buildings
- 13
- Office space
- 1.1M SF
- Median year built
- 1908
- Tallest
- 30 West 21st Street, 15 floors
No space on West 21st Street is listed on Leasemark yet. Own or broker space here? List it free and it is matched against every active requirement the day it goes up, or import a spreadsheet of up to 50 spaces at once.
NYC tax lot records
Every large building on West 21st Street, in address order
From 1-3 West 21st Street to 511-519 West 21st Street. 4 corner or through-block buildings have a main address on another street and are listed at their West 21st Street address.
Spreadsheet
Download these 13 buildings
Owner of record, size, floors, year built, zoning, estimated property tax, last sale, energy grade and nearest subway for every building on this list, as a CSV file for Excel or Google Sheets. Free with a Leasemark account.
City records and estimates, not availability: a building on the list is not a space for lease.
- 1-3 West 21st StreetMain address: 162 Fifth Avenue
- Spero Building19 West 21st Street
- 511-519 West 21st StreetMain address: 510 West 22nd Street
Source: NYC Department of City Planning, PLUTO 26v2, pulled 2026-09-30, with other addresses on each lot from the city's Property Address Directory and sales from ACRIS. Buildings with at least 50,000 square feet of commercial space in the neighborhoods Leasemark covers; floor areas are the city's estimates for whole buildings, not available space.
Largest and oldest on West 21st Street
Largest by office space
Buildings with their main address on West 21st Street.
By year built
NYC storefront registry
Storefronts on West 21st Street
How many shopfronts owners registered along West 21st Street for the end of 2024 and how many stood empty: a quick read on how much choice a retail or restaurant tenant has on the street.
- Registered storefronts
- 34
- Vacant on Dec 31, 2024
- 3
- Vacancy rate
- 8.8%
- Manhattan 11.1%
- A year earlier
- 10.0%
- fewer empty now
Where the storefronts on West 21st Street are
Storefront vacancy across New York City
Source: NYC Department of Finance, Storefronts Reported Vacant or Not (Local Law 157), annual filings, pulled 2026-10-02. Owners of buildings with ground- or second-floor storefronts register each one every year with its status on December 31. Counts are the storefronts whose owners typed West 21st Street in the registration, so a few with misspelled addresses are missing; each is placed in a neighborhood by its map point. The year before is shown only when both filings count about as many storefronts on the street. A vacant storefront is not always on the market: some are being renovated, held empty or already leased to a tenant who has not moved in.
NYC property records (ACRIS)
Building sales on West 21st Street
2 sales of the large buildings on West 21st Street have been recorded since 2016, $126.2 million in all.
Source: NYC Department of Finance, ACRIS, Real Property Master, Legals and Parties, pulled 2026-10-02; prices as the deeds state them, buyers named only when they are companies. Condo buildings (sold unit by unit), partial interests and sales of the company that owns a building are left out.
NYC Department of Finance
Property tax on West 21st Street
Estimated yearly tax per square foot of floor area across the 13 taxed large buildings on West 21st Street, from the 2026/27 assessment roll: taxable value after exemptions times the Class 4 rate, before abatements.
Largest estimated bills
On West 21st Street
- Median: $10.52 a square foot a year; middle half $9.41 to $12.78.
- Manhattan median across every tracked building: $13.61 a square foot.
- None of the buildings is fully exempt.
MTA station data
Subway along West 21st Street
The closest station to each building on the list, in the order the street reaches them. Walks are straight-line estimates.
- 23 St
- 23 St
- 23 St
Source: Metropolitan Transportation Authority, MTA Subway Stations, pulled 2026-10-02.
Questions about West 21st Street
How many office buildings are on West 21st Street?
Leasemark tracks 13 large office buildings on West 21st Street in Manhattan: 9 with their main address on West 21st Street and 4 corner or through-block buildings with a West 21st Street address as well. Together they hold about 1.1 million square feet of office space, from 1-3 West 21st Street to 511-519 West 21st Street, through Flatiron and Chelsea. The list counts buildings with at least 50,000 square feet of commercial space in the neighborhoods Leasemark covers.
What is the largest office building on West 21st Street?
The largest is 15 West 21st Street, with 117,007 square feet of office space on 12 floors, built in 1910. Next come 54 West 21st Street (110K SF) and the Spero Building at 19 West 21st Street (103K SF). The tallest is 30 West 21st Street, 15 floors.
How old are the buildings on West 21st Street?
The median office building on West 21st Street was built in 1908. The oldest with its main address here is 45 West 21st Street (1902) and the newest 510 West 21st Street (1928). 1 dates from before 1900, 11 date from 1900 to 1929 and 1 dates from 1930 to 1959.
When did a building on West 21st Street last sell?
The newest sale on record is 38 West 21st Street, which sold in June 2025 for $31 million to 38 W 21 LLC, per the deed recorded with the city. 2 sales, $126.2 million in all, have been recorded of the large buildings Leasemark tracks on West 21st Street since 2016.
How much property tax do buildings on West 21st Street pay?
The median estimated tax across the 13 taxed large buildings on West 21st Street is about $10.52 a square foot of floor area a year on the Department of Finance's 2026/27 roll (middle half $9.41 to $12.78), against $13.61 across Manhattan. The largest estimated bill, about $5.85 million a year, is for the Adams Dry Goods Building at 675 Avenue of the Americas. Estimates are before abatements, and tenants usually pay their share through the lease.
How many storefronts are vacant on West 21st Street?
Owners registered 34 ground- and second-floor storefronts on West 21st Street in Manhattan with the NYC Department of Finance for the end of 2024, and 3 of them (8.8%) stood vacant on December 31, 2024, against 11.1% across Manhattan and 10.0% on West 21st Street a year earlier. The most are in Flatiron (21) and Chelsea (12). A vacant storefront is not always on the market: some are being renovated, held empty or already leased to a tenant who has not moved in.
What subway lines are near West 21st Street?
The closest stations to the large buildings on West 21st Street, in the order the street reaches them, are 23 St (R W), 23 St (F M) and 23 St (C E). Together they serve the C, E, F, M, R and W lines, per MTA station data.
Is there office space for lease on West 21st Street?
No space on West 21st Street is listed on Leasemark right now. Owners and brokers can list space here for free and it is matched against every active requirement the day it goes up; tenants can post a requirement to be matched when space opens up.