Office building · Harlem, Manhattan
520 West 135th Street
New York, NY 10031
520 West 135th Street is a 3-floor office building in Harlem, Manhattan, built in 1915, with about 43,000 square feet of office space according to city records.
Also at 520-532 West 135th Street.
- Office space
- 43K SF
- Floors
- 3
- Year built
- 1915
- Zoning
- R8A
The 18th largest of the 19 office buildings we track in Harlem. Compare it with 6 neighbors
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Compared with its neighbors
How 520 West 135th Street compares
Next to the 6 nearest large office buildings, all within a 15 minute walk, 520 West 135th Street ranks 6th of 7 by office floor area. It went up in 1915; the median neighbor dates from 1975. Its estimated property tax, about $8.79 a square foot of floor area before abatements, is close to the neighbors' median of $9.22.
| Building | Office space | Floors | Built | Tax / SF |
|---|---|---|---|---|
| 520 West 135th Street | 43K SF | 3 | 1915 | $8.79 |
| 1361 Amsterdam Avenue | 55K SF | 6 | 1911 | $5.74 |
| 461 West 126th Street | 117K SF | 11 | 1980 | $12.28 |
| 423 West 127th Street | 42K SF | 5 | 1936 | $2.95 |
| 450 West 126th Street | 235K SF | 11 | 2019 | $14.49 |
| 374 West 125th Street | 125K SF | 9 | 2002 | $6.37 |
| 215 West 125th Street | 143K SF | 6 | 1971 | $12.07 |
Sources: NYC Department of City Planning, PLUTO 26v2 for size, floors and year built; NYC Department of Finance 2026/27 roll for tax (taxable value times the class rate, before abatements, over the whole floor area). Large means at least 35,000 SF of the building's main use. Walking times are straight-line estimates.
NYC tax lot records
Building facts
- Other address
- 520-532 West 135th Street
- ZIP code
- 10031
- Building type
- Office building (city class O2)
- Total floor area
- 43,000 SF
- Commercial floor area
- 43,000 SF
- Office
- 43,000 SF
- Height
- 3 floors
- Average floor
- About 14,300 SF (floor area divided by floors)
- Year built
- 1915
- Last major alteration
- 1997
- Lot area
- 15,987 SF
- Zoning district
- R8A
- Built FAR
- 2.69
- Tax lot (BBL)
- 1019880053
Nearest subway
- 137 St-City College
- 125 St
- 135 St
Source: NYC Department of City Planning, PLUTO 26v2, pulled 2026-10-05; addresses from the Property Address Directory (PAD) 26b; subway stations from the MTA Subway Stations dataset, pulled 2026-10-05. Floor areas are the city's estimates for the whole building, not available space. Walking times are straight-line estimates. How we build these pages. Something wrong on this page? Tell us.
NYC Department of Finance records
Owner, property tax and assessed value
The Department of Finance lists BLDG 520 WEST 135TH STREET LLC as the owner of record. For tax year 2026/27 the city values 520 West 135th Street at $7.94 million and assesses it at $3.57 million. After phase-ins and exemptions its taxable value is $3.49 million; at the Class 4 rate of 10.848% (tax year 2025/26, the latest rate the Department of Finance lists) that comes to about $378,134 a year before abatements, roughly $8.79 per square foot of floor area. Commercial leases here often pass a tenant's share of tax increases over a base year through as additional rent.
- Owner of record
- BLDG 520 WEST 135TH STREET LLC
- Tax class
- Class 4 (commercial and industrial)
- City market value
- $7,938,000
- Land market value
- $696,000
- Assessed value
- $3,572,100
- Taxable value (phased in)
- $3,485,750
- Estimated yearly tax
- About $378,134
- Tax per SF of floor area
- About $8.79
City market value by tax year
Source: NYC Department of Finance, Property Valuation and Assessment Data (2026/27 roll; owner names as the roll records them, which cuts some long names short), pulled 2026-10-08; tax rate from the Department of Finance tax rates page, checked 2026-09-28. The estimate is the taxable value times the class rate. It leaves out abatements, payment-in-lieu-of-taxes agreements and charges, so the actual bill can differ.
Own or manage 520 West 135th Street? List a space here free and we match it against every active requirement.
NYC energy benchmarking (Local Law 84)
Energy use and emissions
520 West 135th Street's 2024 Local Law 84 benchmarking filing got no ENERGY STAR score, and Local Law 33 letter grades come from that score, so the filing does not yield an A to D grade. Its site energy use came to 26.4 kBtu per square foot, less than half the national median of 54.3 for a similar property. Its greenhouse gas emissions were about 113 metric tons of CO2e (2.42 kg per square foot).
- ENERGY STAR score (2024)
- None given
- Property type (Portfolio Manager)
- Office
- Site energy use intensity
- 26.4 kBtu/SF
- National median for the type
- 54.3 kBtu/SF
- Greenhouse gas emissions
- 113 t CO2e
- Emissions per SF
- 2.42 kg CO2e
- Floor area in the filing
- 46,535 SF
Energy sources in 2024
Source: NYC Department of Buildings and Mayor's Office of Climate and Environmental Justice, NYC Building Energy and Water Data Disclosure for Local Law 84 (2024 filing), pulled 2026-10-08; grade cutoffs from the Department of Buildings energy grades page. Figures are as the owner filed them in ENERGY STAR Portfolio Manager.
Local Law 97 of 2019, estimated
Local Law 97 emissions limit
At its 2024 energy use, 520 West 135th Street comes to about 89 metric tons of CO2e a year under Local Law 97's coefficients, against a limit of 353 tons for 2024 to 2029 (25% of the limit), so it would owe no penalty. From 2030 the limit drops to 125 tons and the same energy use counts as about 57 tons, still under the limit.
- Period
- 2024 to 2029
- Emissions limit
- 353 t CO2e
- Estimated emissions
- 89 t CO2e
- Under the limit by
- 263 t CO2e
- Estimated penalty a year
- None
- Period
- 2030 to 2034
- Emissions limit
- 125 t CO2e
- Estimated emissions
- 57 t CO2e
- Under the limit by
- 68 t CO2e
- Estimated penalty a year
- None
Estimated from the owner's 2024 Local Law 84 filing, which reports energy by source and floor area by use: Office 46,535 SF. It applies the coefficients and per-use limits in Department of Buildings rule 1 RCNY 103-14 and Administrative Code 28-320.3.1.1 (as the Department lists them) and the $268 per ton penalty, checked 2026-10-04. It is not the building's Local Law 97 report: that report can count renewable energy credits, solar and storage deductions and, for 2024 and 2025, the law's occupancy group limits where higher, and penalties can be reduced for good faith efforts.
Change these numbers in the Local Law 97 calculator to see what a cut in energy use would do to the penalty.
Own or manage 520 West 135th Street? List a space here free and we match it against every active requirement.
NYC Department of Buildings permits
Work permits and build-outs
In the 12 months to October 2026, the Department of Buildings issued first permits for 1 job at 520 West 135th Street. In the last two years, interior work was permitted on one floor (floor 2 and the mezzanine). The newest build-out, on floor 2 and the mezzanine, was first permitted in June 2026 (construction, mechanical, plumbing, sprinklers, structural; filed cost estimate $615,000).
- New jobs, last 12 months
- 1
- Initial permits, last 12 months
- 5
- Newest job first permitted
- June 2026
- Interior build-outs, last 24 months
- 1
- Floors with interior work, last 24 months
- 2, mezzanine
Recent build-outs
New jobs by year
Build-outs across HarlemWhere NYC offices are being built out
Source: NYC Department of Buildings, DOB NOW: Build Approved Permits, pulled 2026-10-08 (permits issued through 2026-10-06). A job counts once, when its first permit is issued; renewals are not new work. A build-out groups jobs on the same floors first permitted within 120 days of each other. Costs are the estimates filed with the jobs. Jobs filed before DOB NOW (in the older BIS system) are not counted. A permit is approval to do the work; it does not say who the work is for or whether it is finished.
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Questions about 520 West 135th Street
How big is 520 West 135th Street?
520 West 135th Street has about 43,000 square feet of floor area in total, including 43,000 square feet of office, according to NYC PLUTO 26v2. These are the city's estimates for the whole building, not space that is available.
When was 520 West 135th Street built?
City records list 1915 as the year built, with a major alteration recorded in 1997. The building is 3 floors tall.
What other addresses does 520 West 135th Street have?
City records list 520-532 West 135th Street on the same tax lot (BBL 1019880053) as 520 West 135th Street. A space listed on Leasemark at any of these addresses shows up on this page.
What is the ZIP code of 520 West 135th Street?
520 West 135th Street is in ZIP code 10031, according to the city's tax lot records (NYC PLUTO 26v2) and the Department of Finance's assessment roll. The full mailing address is 520 West 135th Street, New York, NY 10031, in Harlem.
What is the zoning at 520 West 135th Street?
The lot is in the R8A zoning district. PLUTO lists a built floor area ratio (FAR) of 2.69 for this lot.
What subway station is closest to 520 West 135th Street?
The closest subway station to 520 West 135th Street is 137 St-City College (the 1 train), about 950 feet away in a straight line, roughly 4 minutes on foot. The MTA lists it as partly accessible. Also nearby: 125 St (the 1 train), 7 min walk; 135 St (the B and C trains), 7 min walk. Walking times are straight-line estimates; the street route is longer.
Who owns 520 West 135th Street?
The NYC Department of Finance's 2026/27 assessment roll lists BLDG 520 WEST 135TH STREET LLC as the owner of record of 520 West 135th Street (BBL 1019880053). Big buildings are usually held through a company set up for that one property, so the name on the roll can differ from the landlord's brand or the managing agent. Deeds and mortgages for the lot are public in ACRIS, the city's property records system.
Does 520 West 135th Street have an energy grade?
520 West 135th Street's 2024 Local Law 84 benchmarking filing got no ENERGY STAR score, and Local Law 33 letter grades come from that score, so the filing does not yield an A to D grade. Its site energy use came to 26.4 kBtu per square foot, less than half the national median of 54.3 for a similar property. Its greenhouse gas emissions were about 113 metric tons of CO2e (2.42 kg per square foot).
Does 520 West 135th Street meet Local Law 97?
At its 2024 energy use, 520 West 135th Street comes to about 89 metric tons of CO2e a year under Local Law 97's coefficients, against a limit of 353 tons for 2024 to 2029 (25% of the limit), so it would owe no penalty. From 2030 the limit drops to 125 tons and the same energy use counts as about 57 tons, still under the limit. This is an estimate from the owner's 2024 benchmarking filing using the coefficients and per-use limits in the law and the Department of Buildings rule, at $268 per ton over. It is not the building's Local Law 97 report, which can count credits and deductions this estimate cannot.
Is there construction at 520 West 135th Street?
In the 12 months to October 2026, the Department of Buildings issued first permits for 1 job at 520 West 135th Street. In the last two years, interior work was permitted on one floor (floor 2 and the mezzanine). The newest build-out, on floor 2 and the mezzanine, was first permitted in June 2026 (construction, mechanical, plumbing, sprinklers, structural; filed cost estimate $615,000). These are the Department of Buildings' DOB NOW work permits for tax lot 1019880053. A permit is approval to do the work; it does not say who the work is for or whether it is finished.
What are the property taxes at 520 West 135th Street?
The Department of Finance's 2026/27 assessment roll lists a taxable value of $3.49 million for 520 West 135th Street. At the Class 4 rate of 10.848% (tax year 2025/26, the latest rate the Department of Finance lists), that is about $378,134 a year, roughly $8.79 per square foot of floor area, before abatements such as ICAP. The city's property tax records for BBL 1019880053 show the actual bill.
What is the assessed value of 520 West 135th Street?
For tax year 2026/27, the NYC Department of Finance puts the market value of 520 West 135th Street at $7.94 million ($696,000 of it land) and its assessed value at $3.57 million, the 45% of market value the city assesses for Class 4 property. The city's market value fell 18% from 2022/23 ($9.73 million) to 2026/27.
Is there office space for lease at 520 West 135th Street?
No space at 520 West 135th Street is listed on Leasemark right now. Owners and brokers can list space here for free, and tenants can post a requirement to be matched when space opens up.
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