155 East 51st Street
Multifamily Housing in New York City, NY · 11203
At a glance
155 East 51st Street is a 38,169-square-foot multifamily housing building in New York City, New York, built in 1930. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 22 out of 100 (grade D), a site energy-use intensity of 101.1 kBtu/ft² and 234 tCO₂e of greenhouse-gas emissions. That score is higher than 13% 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 | 22 (band D) |
| Site EUI | 101.1 kBtu/ft² |
| Source EUI | 127.4 kBtu/ft² |
| GHG emissions | 234 tCO₂e |
| GHG intensity | 6.1 kgCO₂e/ft² |
| Electricity | 135,816 kWh |
| Natural gas | 33,946 therms |
| Water use | 3,338 kgal |
| Gross floor area | 38,169 sq ft |
| Source record | nyc:6232631:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 22 | -22 | 101.1 kBtu/ft² | 234 tCO₂e |
| 2023 | 44 | -8 | 99.1 kBtu/ft² | 226 tCO₂e |
| 2022 | 52 | 98.4 kBtu/ft² | 215 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
- 155 East 51st Street
- City
- New York City
- State
- New York
- ZIP
- 11203
- Coordinates
- 40.65824, -73.93005
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 155 East 51st 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. 155 East 51st Street's ENERGY STAR score of 22 compares with an average of 63 across the 22,829 that report a score; it scores higher than 13% of them and lower than 87%. 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 6.1 kgCO₂e/ft² is about 18% above the group average of 5.2 kgCO₂e/ft².
At 38,169 sq ft, it is about 62% 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 155 East 51st Street's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 155 East 51st Street, covering report years 2022–2024. Its ENERGY STAR score went from 52 in 2022 to 22 in 2024 (-30 points); its best year on file was 2022, at 52. Site EUI moved from 98.4 kBtu/ft² (2022) to 101.1 kBtu/ft² (2024), an 3% increase. Reported emissions went from 215 tCO₂e to 234 tCO₂e over the same span (up 9%).
What does an ENERGY STAR score of 22 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 22 means the building performs better than about 22% of its national peers. BuildingCensus bands the score into report-card grades; 22 falls in band D — lowest band (1–54). It sits 53 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. 155 East 51st Street's 101.1 kBtu/ft² across 38,169 sq ft works out to about 3.9 billion Btu (1,131 MWh-equivalent) in 2024. Its source EUI of 127.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 135,816 kWh of electricity, 33,946 therms of natural gas and 3,338 thousand gallons of water for the year.
Which law requires 155 East 51st Street to report its energy use?
155 East 51st 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:6232631:2024). 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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- Olinville Manor HDFC· 38,150 sq ft · score 73 (B)
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- 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 155 East 51st Street's energy grade?
155 East 51st Street scores 22 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 155 East 51st Street use?
Its 2024 site energy-use intensity was 101.1 kBtu/ft² (127.4 kBtu/ft² source) across 38,169 sq ft, including 135,816 kWh of electricity and 33,946 therms of natural gas.
What are 155 East 51st Street's carbon emissions?
155 East 51st Street reported 234 tCO₂e of greenhouse-gas emissions (6.1 kgCO₂e/ft²) for 2024.
Where is 155 East 51st Street?
155 East 51st Street is in New York City, New York 11203. Its coordinates are 40.65824, -73.93005 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 155 East 51st Street and when was it built?
155 East 51st Street has 38,169 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 155 East 51st 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, “155 East 51st Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/155-east-51st-street-4b41563b (data as of October 2, 2026).