345 West 70th Street
Multifamily Housing in New York City, NY · 10023
At a glance
345 West 70th Street is a 41,106-square-foot multifamily housing building in New York City, New York, built in 1910. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 59 out of 100 (grade C), a site energy-use intensity of 79.0 kBtu/ft² and 267 tCO₂e of greenhouse-gas emissions. That score is higher than 40% 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 | 59 (band C) |
| Site EUI | 79.0 kBtu/ft² |
| Source EUI | 109.4 kBtu/ft² |
| GHG emissions | 267 tCO₂e |
| GHG intensity | 6.5 kgCO₂e/ft² |
| Electricity | 198,707 kWh |
| Natural gas | 871 therms |
| Water use | 1,368 kgal |
| Gross floor area | 41,106 sq ft |
| Source record | nyc:33200266:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 59 | -10 | 79.0 kBtu/ft² | 267 tCO₂e |
| 2023 | 69 | 70.3 kBtu/ft² | 231 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
- 345 West 70th Street
- City
- New York City
- State
- New York
- ZIP
- 10023
- Coordinates
- 40.77918, -73.98710
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 345 West 70th 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. 345 West 70th Street's ENERGY STAR score of 59 compares with an average of 63 across the 22,829 that report a score; it scores higher than 40% of them and lower than 59%. Its site EUI of 79.0 kBtu/ft² is roughly in line with the average of 74.9 kBtu/ft². Its emissions intensity of 6.5 kgCO₂e/ft² is about 25% above the group average of 5.2 kgCO₂e/ft².
At 41,106 sq ft, it is about 59% below the average floor area of 100,951 sq ft for those buildings. It was built in 1910, 42 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 345 West 70th Street's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for 345 West 70th Street, covering report years 2023–2024. Its ENERGY STAR score went from 69 in 2023 to 59 in 2024 (-10 points); its best year on file was 2023, at 69. Site EUI moved from 70.3 kBtu/ft² (2023) to 79.0 kBtu/ft² (2024), an 12% increase. Reported emissions went from 231 tCO₂e to 267 tCO₂e over the same span (up 16%).
What does an ENERGY STAR score of 59 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 59 means the building performs better than about 59% of its national peers. BuildingCensus bands the score into report-card grades; 59 falls in band C — below median (55–69). It sits 16 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. 345 West 70th Street's 79.0 kBtu/ft² across 41,106 sq ft works out to about 3.2 billion Btu (952 MWh-equivalent) in 2024. Its source EUI of 109.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 198,707 kWh of electricity, 871 therms of natural gas and 1,368 thousand gallons of water for the year.
Which law requires 345 West 70th Street to report its energy use?
345 West 70th 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:33200266:2024). 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
- 2616 Broadway· 41,104 sq ft · score 38 (D)
- 247 West 21st Street· 41,100 sq ft · score 73 (B)
- 220- 226 EAST 29 STREET· 41,094 sq ft · score 60 (C)
- 545 E 166th Street· 41,090 sq ft
- Claremont Square Condominium· 41,081 sq ft · score 9 (D)
- 311 Lexington Ave· 41,075 sq ft · score 71 (B)
- 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 345 West 70th Street's energy grade?
345 West 70th Street scores 59 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 345 West 70th Street use?
Its 2024 site energy-use intensity was 79.0 kBtu/ft² (109.4 kBtu/ft² source) across 41,106 sq ft, including 198,707 kWh of electricity and 871 therms of natural gas.
What are 345 West 70th Street's carbon emissions?
345 West 70th Street reported 267 tCO₂e of greenhouse-gas emissions (6.5 kgCO₂e/ft²) for 2024.
Where is 345 West 70th Street?
345 West 70th Street is in New York City, New York 10023. Its coordinates are 40.77918, -73.98710 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 345 West 70th Street and when was it built?
345 West 70th Street has 41,106 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1910 as its year built. It is classed as multifamily housing.
Is 345 West 70th 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, “345 West 70th Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/345-west-70th-street-11593cae (data as of October 2, 2026).