Cornerstone: 121 W 17th St
Multifamily Housing in New York City, NY · 121 W 17th St · 10011
At a glance
Cornerstone: 121 W 17th St is a 57,029-square-foot multifamily housing building in New York City, New York, built in 1909. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 98 out of 100 (grade A), a site energy-use intensity of 21.1 kBtu/ft² and 125 tCO₂e of greenhouse-gas emissions. That score is higher than 87% 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 | 98 (band A) |
| Site EUI | 21.1 kBtu/ft² |
| Source EUI | 52.2 kBtu/ft² |
| GHG emissions | 125 tCO₂e |
| GHG intensity | 2.2 kgCO₂e/ft² |
| Electricity | 286,795 kWh |
| Natural gas | 2,268 therms |
| Water use | 753 kgal |
| Gross floor area | 57,029 sq ft |
| Source record | nyc:6750819:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 98 | -1 | 21.1 kBtu/ft² | 125 tCO₂e |
| 2023 | 99 | ±0 | 18.3 kBtu/ft² | 107 tCO₂e |
| 2022 | 99 | 22.5 kBtu/ft² | 98 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
- 121 W 17th St
- City
- New York City
- State
- New York
- ZIP
- 10011
- Coordinates
- 40.73967, -73.99638
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does Cornerstone: 121 W 17th St 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. Cornerstone: 121 W 17th St's ENERGY STAR score of 98 compares with an average of 63 across the 22,829 that report a score; it scores higher than 87% of them and lower than 12%. Its site EUI of 21.1 kBtu/ft² is about 72% below the average of 74.9 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 2.2 kgCO₂e/ft² is about 58% below the group average of 5.2 kgCO₂e/ft².
At 57,029 sq ft, it is about 44% below the average floor area of 100,951 sq ft for those buildings. It was built in 1909, 43 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 Cornerstone: 121 W 17th St's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for Cornerstone: 121 W 17th St, covering report years 2022–2024. Its ENERGY STAR score went from 99 in 2022 to 98 in 2024 (-1 points); its best year on file was 2022, at 99. Site EUI moved from 22.5 kBtu/ft² (2022) to 21.1 kBtu/ft² (2024), a 6% decrease. Reported emissions went from 98 tCO₂e to 125 tCO₂e over the same span (up 27%).
What does an ENERGY STAR score of 98 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 98 means the building performs better than about 98% of its national peers. BuildingCensus bands the score into report-card grades; 98 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. Cornerstone: 121 W 17th St's 21.1 kBtu/ft² across 57,029 sq ft works out to about 1.2 billion Btu (353 MWh-equivalent) in 2024. Its source EUI of 52.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 286,795 kWh of electricity, 2,268 therms of natural gas and 753 thousand gallons of water for the year.
Which law requires Cornerstone: 121 W 17th St to report its energy use?
Cornerstone: 121 W 17th 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 2024 disclosure (source record nyc:6750819:2024). 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
- 364 93rd St, 11209· 57,024 sq ft · score 85 (A)
- Chestnut - 1230 Sheridan Avenue· 57,022 sq ft · score 100 (A)
- One Clark Street Housing Corp.· 57,001 sq ft · score 100 (A)
- 8023 19th Avenue· 57,000 sq ft · score 58 (C)
- 351 E 61st St· 57,000 sq ft · score 95 (A)
- OCEAN BAY APARTMENTS - 1440 GNRTR· 57,000 sq ft · EUI 2.2 kBtu/ft²
- 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 Cornerstone: 121 W 17th St's energy grade?
Cornerstone: 121 W 17th St scores 98 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Cornerstone: 121 W 17th St use?
Its 2024 site energy-use intensity was 21.1 kBtu/ft² (52.2 kBtu/ft² source) across 57,029 sq ft, including 286,795 kWh of electricity and 2,268 therms of natural gas.
What are Cornerstone: 121 W 17th St's carbon emissions?
Cornerstone: 121 W 17th St reported 125 tCO₂e of greenhouse-gas emissions (2.2 kgCO₂e/ft²) for 2024.
Where is Cornerstone: 121 W 17th St?
Cornerstone: 121 W 17th St is in New York City, New York 10011. Its coordinates are 40.73967, -73.99638 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Cornerstone: 121 W 17th St and when was it built?
Cornerstone: 121 W 17th St has 57,029 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1909 as its year built. It is classed as multifamily housing.
Is Cornerstone: 121 W 17th St 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, “Cornerstone: 121 W 17th St, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/cornerstone-121-w-17th-st-b5e5d9da (data as of October 2, 2026).