609 West 173rd Street
Multifamily Housing in New York City, NY · 10032
At a glance
609 West 173rd Street is a 28,240-square-foot multifamily housing building in New York City, New York, built in 1925. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 97 out of 100 (grade A), a site energy-use intensity of 81.0 kBtu/ft² and 143 tCO₂e of greenhouse-gas emissions. That score is higher than 86% 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 | 97 (band A) |
| Site EUI | 81.0 kBtu/ft² |
| Source EUI | 106.8 kBtu/ft² |
| GHG emissions | 143 tCO₂e |
| GHG intensity | 5.1 kgCO₂e/ft² |
| Electricity | 103,237 kWh |
| Natural gas | 19,344 therms |
| Water use | 2,165 kgal |
| Gross floor area | 28,240 sq ft |
| Source record | nyc:6811829:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 97 | -1 | 81.0 kBtu/ft² | 143 tCO₂e |
| 2023 | 98 | +1 | 77.9 kBtu/ft² | 137 tCO₂e |
| 2022 | 97 | 81.1 kBtu/ft² | 134 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
- 609 West 173rd Street
- City
- New York City
- State
- New York
- ZIP
- 10032
- Coordinates
- 40.84436, -73.93803
Within ~1 km
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How does 609 West 173rd 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. 609 West 173rd Street's ENERGY STAR score of 97 compares with an average of 63 across the 22,829 that report a score; it scores higher than 86% of them and lower than 13%. Its site EUI of 81.0 kBtu/ft² is roughly in line with the average of 74.9 kBtu/ft². Its emissions intensity of 5.1 kgCO₂e/ft² is roughly in line with the group average of 5.2 kgCO₂e/ft².
At 28,240 sq ft, it is about 72% 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.
How has 609 West 173rd Street's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 609 West 173rd Street, covering report years 2022–2024. Its ENERGY STAR score was 97 in both 2022 and 2024. Site EUI moved from 81.1 kBtu/ft² (2022) to 81.0 kBtu/ft² (2024), a 0% decrease. Reported emissions went from 134 tCO₂e to 143 tCO₂e over the same span (up 7%).
What does an ENERGY STAR score of 97 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 97 means the building performs better than about 97% of its national peers. BuildingCensus bands the score into report-card grades; 97 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. 609 West 173rd Street's 81.0 kBtu/ft² across 28,240 sq ft works out to about 2.3 billion Btu (670 MWh-equivalent) in 2024. Its source EUI of 106.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 103,237 kWh of electricity, 19,344 therms of natural gas and 2,165 thousand gallons of water for the year.
Which law requires 609 West 173rd Street to report its energy use?
609 West 173rd 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:6811829:2024). 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
- 415-419 E 115th St· 28,236 sq ft · score 73 (B)
- 415 - 419 E. 115th St.· 28,236 sq ft · score 99 (A)
- Silverstone Management 88 Walton Street· 28,235 sq ft · score 88 (A)
- Buchbinder: 105 E 19th St· 28,233 sq ft · score 93 (A)
- 333 Cypress Avenue· 28,232 sq ft · EUI 49.7 kBtu/ft²
- 333 CYPRESS AVENUE· 28,232 sq ft · score 86 (A)
- 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 609 West 173rd Street's energy grade?
609 West 173rd Street scores 97 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 609 West 173rd Street use?
Its 2024 site energy-use intensity was 81.0 kBtu/ft² (106.8 kBtu/ft² source) across 28,240 sq ft, including 103,237 kWh of electricity and 19,344 therms of natural gas.
What are 609 West 173rd Street's carbon emissions?
609 West 173rd Street reported 143 tCO₂e of greenhouse-gas emissions (5.1 kgCO₂e/ft²) for 2024.
Where is 609 West 173rd Street?
609 West 173rd Street is in New York City, New York 10032. Its coordinates are 40.84436, -73.93803 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 609 West 173rd Street and when was it built?
609 West 173rd Street has 28,240 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1925 as its year built. It is classed as multifamily housing.
Is 609 West 173rd 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, “609 West 173rd Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/609-west-173rd-street-fb342fd8 (data as of October 2, 2026).