James Lenox House
Multifamily Housing in New York City, NY · 49 E. 73Rd Street · 10021
At a glance
James Lenox House is a 74,427-square-foot multifamily housing building at 49 E. 73Rd Street in New York City, New York, built in 1975. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 55 out of 100 (grade C), a site energy-use intensity of 71.8 kBtu/ft² and 432 tCO₂e of greenhouse-gas emissions. That score is higher than 36% 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 | 55 (band C) |
| Site EUI | 71.8 kBtu/ft² |
| Source EUI | 121.1 kBtu/ft² |
| GHG emissions | 432 tCO₂e |
| GHG intensity | 5.8 kgCO₂e/ft² |
| Electricity | 478,399 kWh |
| Natural gas | 1,705 therms |
| Water use | 2,236 kgal |
| Gross floor area | 74,427 sq ft |
| Source record | nyc:2810884:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 55 | -10 | 71.8 kBtu/ft² | 432 tCO₂e |
| 2023 | 65 | -6 | 64.5 kBtu/ft² | 383 tCO₂e |
| 2022 | 71 | 65.1 kBtu/ft² | 349 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
- 49 E. 73Rd Street
- City
- New York City
- State
- New York
- ZIP
- 10021
- Coordinates
- 40.77228, -73.96447
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does James Lenox House 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. James Lenox House's ENERGY STAR score of 55 compares with an average of 63 across the 22,829 that report a score; it scores higher than 36% of them and lower than 63%. Its site EUI of 71.8 kBtu/ft² is roughly in line with 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 5.8 kgCO₂e/ft² is about 12% above the group average of 5.2 kgCO₂e/ft².
At 74,427 sq ft, it is about 26% below the average floor area of 100,951 sq ft for those buildings. It was built in 1975, 23 years later 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 James Lenox House's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for James Lenox House, covering report years 2022–2024. Its ENERGY STAR score went from 71 in 2022 to 55 in 2024 (-16 points); its best year on file was 2022, at 71. Site EUI moved from 65.1 kBtu/ft² (2022) to 71.8 kBtu/ft² (2024), an 10% increase. Reported emissions went from 349 tCO₂e to 432 tCO₂e over the same span (up 24%).
What does an ENERGY STAR score of 55 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 55 means the building performs better than about 55% of its national peers. BuildingCensus bands the score into report-card grades; 55 falls in band C — below median (55–69). It sits 20 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. James Lenox House's 71.8 kBtu/ft² across 74,427 sq ft works out to about 5.3 billion Btu (1,566 MWh-equivalent) in 2024. Its source EUI of 121.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 478,399 kWh of electricity, 1,705 therms of natural gas and 2,236 thousand gallons of water for the year.
Which law requires James Lenox House to report its energy use?
James Lenox House 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:2810884:2024). 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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- 1885 Atlantic· 74,406 sq ft · score 100 (A)
- 65-60 Wetherole Street· 74,400 sq ft · score 79 (B)
- 620 Fort Washington Avenue· 74,397 sq ft
- 630 Fort Washington Avenue· 74,396 sq ft
- 555 West End Avenue· 74,392 sq ft · EUI 34.0 kBtu/ft²
- Multifamily Housing buildings in New York City· 33,022 benchmarked
- All New York City benchmarked buildings· Local Law 84 (LL84)
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- Least efficient large buildings in New York City
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Frequently asked questions
What is James Lenox House's energy grade?
James Lenox House scores 55 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does James Lenox House use?
Its 2024 site energy-use intensity was 71.8 kBtu/ft² (121.1 kBtu/ft² source) across 74,427 sq ft, including 478,399 kWh of electricity and 1,705 therms of natural gas.
What are James Lenox House's carbon emissions?
James Lenox House reported 432 tCO₂e of greenhouse-gas emissions (5.8 kgCO₂e/ft²) for 2024.
Where is James Lenox House?
James Lenox House is at 49 E. 73Rd Street, in New York City, New York 10021. Its coordinates are 40.77228, -73.96447 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is James Lenox House and when was it built?
James Lenox House has 74,427 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1975 as its year built. It is classed as multifamily housing.
Is James Lenox House 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, “James Lenox House, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/james-lenox-house-c451b2a1 (data as of October 2, 2026).