623 West 170th Street
Multifamily Housing in New York City, NY · 10032
At a glance
623 West 170th Street is a 30,020-square-foot multifamily housing building in New York City, New York, built in 1917. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 100 out of 100 (grade A), a site energy-use intensity of 13.2 kBtu/ft² and 41 tCO₂e of greenhouse-gas emissions. That score is higher than 90% 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 | 100 (band A) |
| Site EUI | 13.2 kBtu/ft² |
| Source EUI | 32.3 kBtu/ft² |
| GHG emissions | 41 tCO₂e |
| GHG intensity | 1.4 kgCO₂e/ft² |
| Electricity | 92,476 kWh |
| Natural gas | 822 therms |
| Water use | 2,494 kgal |
| Gross floor area | 30,020 sq ft |
| Source record | nyc:22028497:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 100 | ±0 | 13.2 kBtu/ft² | 41 tCO₂e |
| 2023 | 100 | +29 | 11.7 kBtu/ft² | 34 tCO₂e |
| 2022 | 71 | 92.4 kBtu/ft² | 207 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
- 623 West 170th Street
- City
- New York City
- State
- New York
- ZIP
- 10032
- Coordinates
- 40.84273, -73.93993
Within ~1 km
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How does 623 West 170th 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. 623 West 170th Street's ENERGY STAR score of 100 compares with an average of 63 across the 22,829 that report a score; it scores higher than 90% of them. Its site EUI of 13.2 kBtu/ft² is about 82% 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 1.4 kgCO₂e/ft² is about 74% below the group average of 5.2 kgCO₂e/ft².
At 30,020 sq ft, it is about 70% below the average floor area of 100,951 sq ft for those buildings. It was built in 1917, 35 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 623 West 170th Street's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 623 West 170th Street, covering report years 2022–2024. Its ENERGY STAR score went from 71 in 2022 to 100 in 2024 (+29 points); its best year on file was 2023, at 100. Site EUI moved from 92.4 kBtu/ft² (2022) to 13.2 kBtu/ft² (2024), a 86% decrease. Reported emissions went from 207 tCO₂e to 41 tCO₂e over the same span (down 80%).
What does an ENERGY STAR score of 100 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: 100 is the top of the scale. BuildingCensus bands the score into report-card grades; 100 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. 623 West 170th Street's 13.2 kBtu/ft² across 30,020 sq ft works out to about 0.4 billion Btu (116 MWh-equivalent) in 2024. Its source EUI of 32.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 92,476 kWh of electricity, 822 therms of natural gas and 2,494 thousand gallons of water for the year.
Which law requires 623 West 170th Street to report its energy use?
623 West 170th 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:22028497:2024). 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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- 65 4TH AVENUE· 30,014 sq ft · EUI 90.7 kBtu/ft²
- 155 Water Street· 30,010 sq ft · score 98 (A)
- 510 Ocean Avenue· 30,010 sq ft · score 3 (D)
- 4401 17th Avenue· 30,010 sq ft · score 18 (D)
- 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 623 West 170th Street's energy grade?
623 West 170th Street scores 100 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 623 West 170th Street use?
Its 2024 site energy-use intensity was 13.2 kBtu/ft² (32.3 kBtu/ft² source) across 30,020 sq ft, including 92,476 kWh of electricity and 822 therms of natural gas.
What are 623 West 170th Street's carbon emissions?
623 West 170th Street reported 41 tCO₂e of greenhouse-gas emissions (1.4 kgCO₂e/ft²) for 2024.
Where is 623 West 170th Street?
623 West 170th Street is in New York City, New York 10032. Its coordinates are 40.84273, -73.93993 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 623 West 170th Street and when was it built?
623 West 170th Street has 30,020 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1917 as its year built. It is classed as multifamily housing.
Is 623 West 170th 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, “623 West 170th Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/623-west-170th-street-b22cccb4 (data as of October 2, 2026).