527 West 121 St
Residence Hall/Dormitory in New York City, NY · 10027
At a glance
527 West 121 St is a 28,302-square-foot residence hall/dormitory in New York City, New York, built in 1926. In its 2023 New York City benchmarking disclosure it reported an ENERGY STAR score of 100 out of 100 (grade A), a site energy-use intensity of 18.8 kBtu/ft² and 31 tCO₂e of greenhouse-gas emissions. That score is higher than 85% of the 177 scored residence hall/dormitory buildings in New York City.
Local Law 84 (LL84) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 100 (band A) |
| Site EUI | 18.8 kBtu/ft² |
| Source EUI | 22.6 kBtu/ft² |
| GHG emissions | 31 tCO₂e |
| GHG intensity | 1.1 kgCO₂e/ft² |
| Electricity | 13,886 kWh |
| Natural gas | 4,836 therms |
| Water use | 942 kgal |
| Gross floor area | 28,302 sq ft |
| Source record | nyc:8169138:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 100 | +15 | 18.8 kBtu/ft² | 31 tCO₂e |
| 2022 | 85 | 80.9 kBtu/ft² | 130 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
- 527 West 121 St
- City
- New York City
- State
- New York
- ZIP
- 10027
- Coordinates
- 40.81083, -73.96066
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 527 West 121 St compare with other residence hall/dormitory buildings in New York City?
The latest disclosures cover 343 residence hall/dormitory buildings in New York City, out of 48,310 buildings citywide. 527 West 121 St's ENERGY STAR score of 100 compares with an average of 69 across the 177 that report a score; it scores higher than 85% of them. Its site EUI of 18.8 kBtu/ft² is about 76% below the average of 79.6 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 1.1 kgCO₂e/ft² is about 80% below the group average of 5.5 kgCO₂e/ft².
At 28,302 sq ft, it is about 67% below the average floor area of 85,583 sq ft for those buildings. It was built in 1926, 20 years earlier than the group's average year built (1947). Across all 24 jurisdictions BuildingCensus covers, the 702 residence hall/dormitory buildings average an ENERGY STAR score of 70 and a site EUI of 70.7 kBtu/ft².
How has 527 West 121 St's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for 527 West 121 St, covering report years 2022–2023. Its ENERGY STAR score went from 85 in 2022 to 100 in 2023 (+15 points). Site EUI moved from 80.9 kBtu/ft² (2022) to 18.8 kBtu/ft² (2023), a 77% decrease. Reported emissions went from 130 tCO₂e to 31 tCO₂e over the same span (down 76%).
What does an ENERGY STAR score of 100 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: 100 is the top of the scale. BuildingCensus bands the score into report-card grades; 100 falls in band A — high performer (85–100). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. 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. 527 West 121 St's 18.8 kBtu/ft² across 28,302 sq ft works out to about 0.5 billion Btu (156 MWh-equivalent) in 2023. Its source EUI of 22.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 13,886 kWh of electricity, 4,836 therms of natural gas and 942 thousand gallons of water for the year.
Which law requires 527 West 121 St to report its energy use?
527 West 121 St 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 2023 disclosure (source record nyc:8169138:2023). 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 residence hall/dormitory buildings in New York City
- 520 West 122nd Street· 28,140 sq ft · score 93 (A)
- 1190 WASHINGTON AVENUE LLC· 28,063 sq ft · score 98 (A)
- Townhouses - Steuben St· 28,048 sq ft · EUI 61.6 kBtu/ft²
- Townhouses - Willoughby Ave· 28,048 sq ft · EUI 62.0 kBtu/ft²
- Townhouses - Emerson Pl· 28,048 sq ft · EUI 63.3 kBtu/ft²
- 511 West 112 St· 27,534 sq ft · score 100 (A)
- Residence Hall/Dormitory buildings in New York City· 343 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 527 West 121 St's energy grade?
527 West 121 St scores 100 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2023 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 527 West 121 St use?
Its 2023 site energy-use intensity was 18.8 kBtu/ft² (22.6 kBtu/ft² source) across 28,302 sq ft, including 13,886 kWh of electricity and 4,836 therms of natural gas.
What are 527 West 121 St's carbon emissions?
527 West 121 St reported 31 tCO₂e of greenhouse-gas emissions (1.1 kgCO₂e/ft²) for 2023.
Where is 527 West 121 St?
527 West 121 St is in New York City, New York 10027. Its coordinates are 40.81083, -73.96066 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 527 West 121 St and when was it built?
527 West 121 St has 28,302 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1926 as its year built. It is classed as residence hall/dormitory.
Is 527 West 121 St covered by Local Law 84 (LL84)?
Yes — it appears in the 2023 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, “527 West 121 St, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/527-west-121-st-5c02f0b2 (data as of October 2, 2026).