EK 66 LLC
Multifamily Housing in New York City, NY · 340 East 66 Street · 10065
At a glance
EK 66 LLC is a 64,071-square-foot multifamily housing building at 340 East 66 Street in New York City, New York, built in 1925. In its 2022 New York City benchmarking disclosure it reported an ENERGY STAR score of 99 out of 100 (grade A), a site energy-use intensity of 55.7 kBtu/ft² and 194 tCO₂e of greenhouse-gas emissions. That score is higher than 88% of the 22,829 scored multifamily housing buildings in New York City.
Local Law 84 (LL84) · reporting year 2022
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 99 (band A) |
| Site EUI | 55.7 kBtu/ft² |
| Source EUI | 62.1 kBtu/ft² |
| GHG emissions | 194 tCO₂e |
| GHG intensity | 3.0 kgCO₂e/ft² |
| Electricity | 38,781 kWh |
| Water use | 2,671 kgal |
| Gross floor area | 64,071 sq ft |
| Source record | nyc:6826207:2022 |
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
- 340 East 66 Street
- City
- New York City
- State
- New York
- ZIP
- 10065
- Coordinates
- 40.76455, -73.96013
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does EK 66 LLC 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. EK 66 LLC's ENERGY STAR score of 99 compares with an average of 63 across the 22,829 that report a score; it scores higher than 88% of them and lower than 10%. Its site EUI of 55.7 kBtu/ft² is about 26% 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 3.0 kgCO₂e/ft² is about 42% below the group average of 5.2 kgCO₂e/ft².
At 64,071 sq ft, it is about 37% below the average floor area of 100,951 sq ft for those buildings. It was built in 1925, 27 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.
What does an ENERGY STAR score of 99 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 99 means the building performs better than about 99% of its national peers. BuildingCensus bands the score into report-card grades; 99 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. EK 66 LLC's 55.7 kBtu/ft² across 64,071 sq ft works out to about 3.6 billion Btu (1,046 MWh-equivalent) in 2022. Its source EUI of 62.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 38,781 kWh of electricity and 2,671 thousand gallons of water for the year.
Which law requires EK 66 LLC to report its energy use?
EK 66 LLC 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 2022 disclosure (source record nyc:6826207:2022). 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
- A02530 - 125 Ocean Avenue Corp· 64,069 sq ft · score 89 (A)
- 552 Riverside Drive· 64,068 sq ft · score 94 (A)
- 188 St. Nicholas Avenue· 64,058 sq ft · score 35 (D)
- 1818 Anthony Avenue - data· 64,032 sq ft · score 65 (C)
- Red Group: 1704 Ocean Ave.· 64,029 sq ft · score 100 (A)
- 265 Hawthone Street· 64,020 sq ft · score 68 (C)
- 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 EK 66 LLC's energy grade?
EK 66 LLC scores 99 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2022 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does EK 66 LLC use?
Its 2022 site energy-use intensity was 55.7 kBtu/ft² (62.1 kBtu/ft² source) across 64,071 sq ft, including 38,781 kWh of electricity.
What are EK 66 LLC's carbon emissions?
EK 66 LLC reported 194 tCO₂e of greenhouse-gas emissions (3.0 kgCO₂e/ft²) for 2022.
Where is EK 66 LLC?
EK 66 LLC is at 340 East 66 Street, in New York City, New York 10065. Its coordinates are 40.76455, -73.96013 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is EK 66 LLC and when was it built?
EK 66 LLC has 64,071 sq ft of gross floor area, as reported in its 2022 disclosure. The disclosure lists 1925 as its year built. It is classed as multifamily housing.
Is EK 66 LLC covered by Local Law 84 (LL84)?
Yes — it appears in the 2022 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, “EK 66 LLC, New York City, New York — 2022 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/ek-66-llc-cecf295c (data as of October 2, 2026).