| Primary address | 42 East 23rd Street |
| Neighborhood | Flatiron District |
| Zip code | 10010 |
| Borough | Manhattan |
| Block & lot | 00851-0048 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Tax class | Register |
| Estimated property tax | $92,330 |
| Lot sqft | 2,469 |
| Lot dimensions | |
| Building class | Office with Commercial 7-19 Stories (O6)
|
| Building sqft | 17,078 |
| Building dimensions |
| Buildings on lot | 1 |
| Stories | 8 |
| Year built | 1905 |
| Construction type | Register |
| School district | 2 |
| Community district | 5 |
| Closest police station | 0.61 Miles |
| Closest fire station | 0.23 Miles |
View more neighborhood information such as transportation, nearby schools and risk designations in the dedicated tab.
New York property reports include comprehensive occupancy, development and violation information. Create a free account to access valuable data points such as:
This Office with Commercial 7-19 Stories (O6) located at 42 East 23rd Street, New York, NY 10010 has a total of 17,078 square feet.
What is the year built & the current market value of 42 East 23rd Street, New York, NY 10010?42 East 23rd Street, New York, NY 10010 was built in 1905 and has a current tax assessor's market value of $1,966,000.
How many commercial spaces does this building have?This building has 11 commercial spaces available for lease. There are 1 active listings at this address.
View property contacts like owners, building management, representatives from permits and tenants with a free account. For LLC-owned properties, access manually researched real owners and phone numbers.
| Listing type | For Sale |
|---|---|
| Listing date | 10/29/2025 |
| Last updated | 05/20/2026 |
| Lot size | 0.6801 Acre |
BKREA has been retained on an exclusive basis to arrange the sale of 42 East 23rd Street (“The Property”), a remarkable eight-story commercial building that is currently vacant. The Property has a lot area of approximately 2,469 square feet and is located on the south side of East 23rd Street, with roughly 25 feet of frontage between Park Avenue South and Broadway. It is just steps from Madison Square Park and in close proximity to the Flatiron Building, one of New York City’s most iconic landmarks. Constructed in 1905, 42 East 23rd Street comprises a total of 17,078 gross square feet. The Property is located within a C6-4M (R10 equivalent) zoning district. The as-of-right zoning allows for a 10.0 FAR for residential, commercial, and community facility uses, translating to approximately 24,690 zoning floor area (ZFA). Given the R10 equivalent, the site can achieve up to a resi FAR of 12.0 or 29,628 ZFA through the purchase of off-site UAP certificates from a generating site within Community Board 5 or within one-half mile of the Property. Alternatively, the additional 2.0 FAR may be built on-site through the inclusion of affordable housing. 42 East 23rd Street presents a blank slate for developers, conversion specialists, office investors, or owner-users to bring their new vision to life.BKREA has been retained on an exclusive basis to arrange the sale of 42 East 23rd Street (“The Property”), a remarkable eight-story commercial building that is currently vacant. The Property has a lot area of approximately 2,469 square feet and is located on the south side of East 23rd Street, with roughly 25 feet of frontage between Park Avenue South and Broadway. It is just steps from Madison Square Park and in close proximity to the Flatiron Building, one of New York City’s most iconic landmarks. Constructed in 1905, 42 East 23rd Street comprises a total of 17,078 gross square feet. The Property is located within a C6-4M (R10 equivalent) zoning district. The as-of-right zoning allows for a 10.0 FAR for residential, commercial, and community facility uses, translating to approximately 24,690 zoning floor area (ZFA). Given the R10 equivalent, the site can achieve up to a resi FAR of 12.0 or 29,628 ZFA through the purchase of off-site UAP certificates from a generating site within Community Board 5 or within one-half mile of the Property. Alternatively, the additional 2.0 FAR may be built on-site through the inclusion of affordable housing. 42 East 23rd Street presents a blank slate for developers, conversion specialists, office investors, or owner-users to bring their new vision to life.
Create a free account to view the complete sales history for 42 East 23rd Street, New York, including title documents, transfer conditions, mortgages, liens, and pre-foreclosures.
To view the complete history of deeds, mortgages, assignments of leases and rents, and more, sign up for free. Available data goes back to 1966.
R: Recorded date
D: Document date
Access detailed property tax data for 42 East 23rd Street, New York, NY 10010. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year: | 2025-2026 |
| Property tax: | $88,777 |
| Estimated property tax: | $92,330 |
| Tax assessor's market value: | $1,966,000 |
| Assessed value: | $884,700 |
Here's the assessment & property tax history for 42 East 23rd Street, New York, including the evolution of the total tax rate and corresponding property tax.
| Year | Market value | Assessed value | Taxable | Tax rate % | Base tax | Property tax | Year over year change |
|---|---|---|---|---|---|---|---|
| 2025/26 | $1,966,000 | $884,700 | $818,370 | 10.848% | $88,777 | $88,777 | +4.23% |
| 2024/25 | $1,938,000 | $872,100 | $791,460 | 10.762% | $85,177 | $85,177 | +3.96% |
| 2023/24 | $1,900,000 | $855,000 | $773,550 | 10.592% | $81,934 | $81,934 | +3.54% |
| 2022/23 | $1,787,000 | $804,150 | $743,310 | 10.646% | $79,133 | $79,133 | +1.18% |
| 2021/22 | $1,616,000 | $727,200 | $727,200 | 10.755% | $78,210 | $78,210 | -0.54% |
The complete history of permits filed for 42 East 23rd Street, New York, including new construction or demolition permits, plus any work pertaining to plumbing, heating and sprinkler systems is available with a free account. Available data goes back to 1990.
Access a detailed real estate market overview of Manhattan so you can assess current trends, property values, types of properties sold and transaction volume. View the median price per sqft in Manhattan and compare it to other boroughs in New York City.
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| FEMA flood zone(s): | X (See more on map) |
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Distance to Subway
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| Closest station | Park Ave & 23rd St at SW Corner | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Station lines | 6 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Distance (miles) | 0.036 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Bus Routes
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| Name | E 23 St/Park Av | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line | X2 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Distance (miles) | 0.026 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Here are the neighbors for 42 East 23rd Street, New York, NY 10010.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 10 E 22nd St, New York | 10,250 | ||
| 280 Park Ave S, New York | 253,543 | ||
| 38 E 23rd St, New York | 8,216 | 04/22/1999 | |
| 304 Park Ave S, New York | 183,815 | 11/01/2017 | $28,050,000 |
| 34 E 23rd St, New York | 10,975 | 11/15/2001 | |
| 16 E 23rd St, New York | 13,837 | 07/17/1981 | |
| 36 E 23rd St, New York | 24,038 | 12/07/2000 | |
| 14 E 23rd St, New York | 7,526 | 03/17/2004 | $3,670,000 |
| 24 E 22nd St, New York | 17,840 | ||
| 30 E 23rd St, New York | 22,512 | 05/19/2017 | |
| 28 E 23rd St, New York | 2,470 | 11/15/2001 | |
| 300 Park Ave S, New York | 168,200 | 11/01/2017 | $28,050,000 |
| 21 E 22nd St, New York | 149,276 | 06/30/1982 | |
| 18 E 23rd St, New York | 10,889 | 12/15/2017 | $13,500,000 |
| 33 E 22nd St, New York | 32,415 | 04/30/2015 | $590,000 |
| 32 E 23rd St, New York | 4,688 | 11/15/2001 | |
| 26 E 23rd St, New York | 4,800 | 05/14/2008 | $1,500,000 |
| 175 5th Ave, New York | 183,449 | 10/25/2023 | $40,250,000 |
| 936 Broadway, New York | 61,147 | ||
| 25 E 21st St, New York | 33,120 |
