635 West 174th Street
Multifamily Housing in New York City, NY · 4121 BROADWAY · 10033
At a glance
635 West 174th Street is a 89,614-square-foot multifamily housing building at 4121 BROADWAY in New York City, New York, built in 1930. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 17 out of 100 (grade D), a site energy-use intensity of 101.1 kBtu/ft² and 593 tCO₂e of greenhouse-gas emissions. That score is higher than 10% of the 22,829 scored multifamily housing buildings in New York City.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 17 (band D) |
| Site EUI | 101.1 kBtu/ft² |
| Source EUI | 141.2 kBtu/ft² |
| GHG emissions | 593 tCO₂e |
| GHG intensity | 6.6 kgCO₂e/ft² |
| Electricity | 525,517 kWh |
| Natural gas | 72,707 therms |
| Water use | 7,334 kgal |
| Gross floor area | 89,614 sq ft |
| Source record | nyc:2789436:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 17 | +8 | 101.1 kBtu/ft² | 593 tCO₂e |
| 2023 | 9 | -6 | 108.0 kBtu/ft² | 629 tCO₂e |
| 2022 | 15 | 105.9 kBtu/ft² | 571 tCO₂e |
Compliance context
Local Law 84 (LL84)
Under Local Law 97, buildings over 25,000 sq ft face carbon caps with fines of $268 per metric ton of CO₂e over the limit, phasing in from 2024.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 4121 BROADWAY
- City
- New York City
- State
- New York
- ZIP
- 10033
- Coordinates
- 40.84561, -73.93864
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 635 West 174th Street compare with other multifamily housing buildings in New York City?
The latest disclosures cover 33,022 multifamily housing buildings in New York City, out of 48,310 buildings citywide. 635 West 174th Street's ENERGY STAR score of 17 compares with an average of 63 across the 22,829 that report a score; it scores higher than 10% of them and lower than 89%. Its site EUI of 101.1 kBtu/ft² is about 35% above the average of 74.9 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 6.6 kgCO₂e/ft² is about 27% above the group average of 5.2 kgCO₂e/ft².
At 89,614 sq ft, it is about 11% below the average floor area of 100,951 sq ft for those buildings. It was built in 1930, 22 years earlier than the group's average year built (1952). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².
How has 635 West 174th Street's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 635 West 174th Street, covering report years 2022–2024. Its ENERGY STAR score went from 15 in 2022 to 17 in 2024 (+2 points). Site EUI moved from 105.9 kBtu/ft² (2022) to 101.1 kBtu/ft² (2024), a 5% decrease. Reported emissions went from 571 tCO₂e to 593 tCO₂e over the same span (up 4%).
What does an ENERGY STAR score of 17 mean?
ENERGY STAR scores run from 1 to 100 and are computed by the EPA's Portfolio Manager as a percentile against similar buildings nationwide, adjusted for climate, size and use: a score of 17 means the building performs better than about 17% of its national peers. BuildingCensus bands the score into report-card grades; 17 falls in band D — lowest band (1–54). It sits 58 points below 75, the threshold for ENERGY STAR certification. In New York City, 43% of scored buildings are at 75 or above.
Site energy-use intensity (EUI) is the energy a building uses on site in a year divided by its floor area, in thousand Btu per square foot — lower is more efficient. 635 West 174th Street's 101.1 kBtu/ft² across 89,614 sq ft works out to about 9.1 billion Btu (2,655 MWh-equivalent) in 2024. Its source EUI of 141.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 525,517 kWh of electricity, 72,707 therms of natural gas and 7,334 thousand gallons of water for the year.
Which law requires 635 West 174th Street to report its energy use?
635 West 174th Street reports under Local Law 84 (LL84), the legal basis of New York City's Energy and Water Data Disclosure program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2024 disclosure (source record nyc:2789436:2024). Under Local Law 97, buildings over 25,000 sq ft face carbon caps with fines of $268 per metric ton of CO₂e over the limit, phasing in from 2024.
More multifamily housing buildings in New York City
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- Wavecrest - CAMPUS - 520 - 528 West 145th Street· 89,610 sq ft · score 20 (D)
- 31-72 31st Street· 89,600 sq ft · score 97 (A)
- Imperial && Estate: 118-40 Metropolitan Ave· 89,587 sq ft · score 65 (C)
- 961 Eastern Realty Co. Inc.· 89,562 sq ft · score 89 (A)
- 310 East 75th Street· 89,532 sq ft · score 89 (A)
- Multifamily Housing buildings in New York City· 33,022 benchmarked
- All New York City benchmarked buildings· Local Law 84 (LL84)
- Most efficient large buildings in New York City
- Least efficient large buildings in New York City
- Biggest emitters in New York City
Frequently asked questions
What is 635 West 174th Street's energy grade?
635 West 174th Street scores 17 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 635 West 174th Street use?
Its 2024 site energy-use intensity was 101.1 kBtu/ft² (141.2 kBtu/ft² source) across 89,614 sq ft, including 525,517 kWh of electricity and 72,707 therms of natural gas.
What are 635 West 174th Street's carbon emissions?
635 West 174th Street reported 593 tCO₂e of greenhouse-gas emissions (6.6 kgCO₂e/ft²) for 2024.
Where is 635 West 174th Street?
635 West 174th Street is at 4121 BROADWAY, in New York City, New York 10033. Its coordinates are 40.84561, -73.93864 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 635 West 174th Street and when was it built?
635 West 174th Street has 89,614 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1930 as its year built. It is classed as multifamily housing.
Is 635 West 174th Street covered by Local Law 84 (LL84)?
Yes — it appears in the 2024 Energy and Water Data Disclosure disclosure, which lists the buildings reporting under Local Law 84 (LL84).
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About this data
Source: Energy and Water Data Disclosure (Local Law 84 (LL84)), as published October 2, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “635 West 174th Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/635-west-174th-street-adda22f6 (data as of October 2, 2026).