| Building name | Lefcourt National Building |
| Primary address | Lefcourt National Building - 521 5th Avenue |
| Secondary address | 1 E 43rd St |
| Neighborhood | Central Midtown |
| Zip code | 10175 |
| Borough | Manhattan |
| Block & lot | 01278-0001 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Purchase date | 05/22/2019 |
| Purchase price | $379,283,537 |
| Tax class | Register |
| Estimated property tax | $8,331,621 |
| Lot sq. ft. | 19,047 |
| Lot dimensions | |
| Property type | Office Only with or without Commercial - 20 Stories or More (O4)
|
| Building sqft | 434,152 |
| Building dimensions |
| Buildings on lot | 1 |
| Stories | 38 |
| Year built | 1929 |
| Year last altered | 2019 |
| Construction type | Register |
| School district | 2 |
| Community district | 5 |
| Closest police station | 0.48 Miles |
| Closest fire station | 0.11 Miles |
View more neighborhood information such as transportation, nearby schools and risk designations in the dedicated tab.
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You will find all alternate addresses for the property in this section.
This Office Only with or without Commercial - 20 Stories or More (O4) located at Lefcourt National Building - 521 5th Avenue, New York, NY 10175 has a total of 434,152 square feet and a current price per square foot of $873.
What is the year built & the current market value of Lefcourt National Building - 521 5th Avenue, New York, NY 10175?Lefcourt National Building - 521 5th Avenue, New York, NY 10175 was built in 1929 and has a current tax assessor's market value of $179,267,000.
How many commercial spaces does this building have?This building has 61 commercial spaces available for lease. There are 7 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 Lease |
|---|---|
| Last updated | 12/15/2025 |
| Lot size | 0.44 Acre |
| Suite name | Space type | Lease rate | Available space | Brokers |
|---|---|---|---|---|
| 29th Floor | General Office | Listing price not available | 6,046 | Peter Turchin Timothy Freydberg Benjamin Joseph |
| 20th Floor | General Office | Listing price not available | 12,265 | Peter Turchin Timothy Freydberg Benjamin Joseph |
| 10th Floor | General Office | Listing price not available | 21,185 | Peter Turchin Timothy Freydberg Benjamin Joseph |
| 9th Floor | General Office | Listing price not available | 21,185 | Peter Turchin Timothy Freydberg Benjamin Joseph |
| 4th Floor | General Office | Listing price not available | 22,126 | Peter Turchin Timothy Freydberg Benjamin Joseph |
| 3rd Floor | General Office | Listing price not available | 22,818 | Peter Turchin Timothy Freydberg Benjamin Joseph |
| Listing type | For Lease |
|---|---|
| Listing date | 04/02/2025 |
| Last updated | 05/20/2026 |
| Suite name | Space type | Lease rate | Available space | Brokers |
|---|---|---|---|---|
| Partial Building | Interior Retail | Listing price not available | 22,238 | Steven A. Soutendijk Sean Moran Patrick O'Rourke |
Create a free account to view the complete sales history for 521 5th Avenue, New York, including title documents, transfer conditions, mortgages, liens, and pre-foreclosures.
*Here are the three most recent sales for this property.
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 Lefcourt National Building - Lefcourt National Building - 521 5th Avenue, New York, NY 10175. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year: | 2025-2026 |
| Property tax: | $8,133,874 |
| Estimated property tax: | $8,331,621 |
| Tax assessor's market value: | $179,267,000 |
| Assessed value: | $80,670,150 |
Here's the assessment & property tax history for 521 5th Avenue, 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 | $179,267,000 | $80,670,150 | $74,980,403 | 10.848% | $8,133,874 | $8,133,874 | -0.01% |
| 2024/25 | $171,851,000 | $77,332,950 | $75,590,787 | 10.762% | $8,135,080 | $8,135,080 | +11.73% |
| 2023/24 | $153,796,000 | $69,208,200 | $68,742,900 | 10.592% | $7,281,248 | $7,281,248 | +0.63% |
| 2022/23 | $151,043,000 | $67,969,350 | $67,969,350 | 10.646% | $7,236,017 | $7,236,017 | +21.08% |
| 2021/22 | $123,478,000 | $55,565,100 | $55,565,100 | 10.755% | $5,976,027 | $5,976,027 | -21.78% |
The complete history of permits filed for 521 5th Avenue, 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.
Check out recently sold homes in Manhattan and see how their prices compare.
| FEMA flood zone(s): | X (See more on map) |
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Distance to Subway
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| Closest station | Madison Ave & 42nd St at NW Corner | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Station lines | GS-4-5-6-7 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Distance (miles) | 0.076 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Bus Routes
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| Name | 5 Av/W 44 St | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line | X68 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Distance (miles) | 0.033 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Here are the neighbors for Lefcourt National Building - Lefcourt National Building - 521 5th Avenue, New York, NY 10175.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 10 E 44th St, New York | 16,629 | 06/04/1997 | |
| 535 5th Ave, New York | 332,312 | 03/10/2006 | $116,250,000 |
| 14 E 44th St, New York | 11,550 | 07/22/2016 | $11,900,000 |
| 6 E 43rd St, New York | 304,525 | 09/29/2025 | $135,000,000 |
| 505 5th Ave, New York | 251,043 | 11/01/2017 | $28,050,000 |
| 12 E 44th St, New York | 17,668 | 04/30/2015 | $26,470,300 |
| 3 E 44th St, New York | 14,446 | 08/06/2019 | $15,300,000 |
| 11 E 44th St, New York | 110,999 | 10/15/2025 | $75,000,000 |
| 330 Madison Ave, New York | 733,001 | 02/28/2020 | $900,000,000 |
| 3 E 43rd St, New York | 36,616 | 12/16/2015 | $10 |
| 6 E 44th St, New York | 62,918 | 11/09/2006 | |
| 1 Vanderbilt Ave, New York | 1,678,135 | 10/02/2020 | |
| 1 E 42nd St, New York | 62,387 | 03/29/2005 | $30,000,000 |
| 529 5th Ave, New York | 271,266 | 06/22/2023 | $107,608,985 |
| 501 5th Ave, New York | 132,961 | 01/06/2006 | $15,792,259 |
| 335 Madison Ave, New York | 874,744 | 10/02/2020 | |
| 90 E 42nd St, New York | 7,650 | ||
| 18 E 42nd St, New York | 11,938 | 08/09/2001 |
