21 Astor Place Condominium (21 Astor Place)
Multifamily Housing in New York City, NY · 21 Astor Place · 10003
At a glance
21 Astor Place Condominium (21 Astor Place) is a 129,129-square-foot multifamily housing building in New York City, New York, built in 1930. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 45.5 kBtu/ft² and 601 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 45.5 kBtu/ft² |
| Source EUI | 111.0 kBtu/ft² |
| GHG emissions | 601 tCO₂e |
| GHG intensity | 4.7 kgCO₂e/ft² |
| Electricity | 1,367,252 kWh |
| Natural gas | 12,086 therms |
| Gross floor area | 129,129 sq ft |
| Source record | nyc:32919706:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 45.5 kBtu/ft² | 601 tCO₂e | |
| 2023 | 48 | 64.8 kBtu/ft² | 642 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
- 21 Astor Place
- City
- New York City
- State
- New York
- ZIP
- 10003
- Coordinates
- 40.72999, -73.99222
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 21 Astor Place Condominium (21 Astor Place) 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. Its site EUI of 45.5 kBtu/ft² is about 39% 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 4.7 kgCO₂e/ft² is about 11% below the group average of 5.2 kgCO₂e/ft².
At 129,129 sq ft, it is about 28% above the average floor area of 100,951 sq ft for those buildings. It was built in 1930, 22 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 21 Astor Place Condominium (21 Astor Place)'s energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for 21 Astor Place Condominium (21 Astor Place), covering report years 2023–2024. Site EUI moved from 64.8 kBtu/ft² (2023) to 45.5 kBtu/ft² (2024), a 30% decrease. Reported emissions went from 642 tCO₂e to 601 tCO₂e over the same span (down 6%).
What does a site EUI of 45.5 kBtu/ft² mean?
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. 21 Astor Place Condominium (21 Astor Place)'s 45.5 kBtu/ft² across 129,129 sq ft works out to about 5.9 billion Btu (1,722 MWh-equivalent) in 2024. Its source EUI of 111.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,367,252 kWh of electricity and 12,086 therms of natural gas for the year.
Which law requires 21 Astor Place Condominium (21 Astor Place) to report its energy use?
21 Astor Place Condominium (21 Astor Place) 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:32919706:2024). 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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- VP: 2260 UNIVERSITY AVENUE· 129,027 sq ft · score 62 (C)
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- Multifamily Housing buildings in New York City· 33,022 benchmarked
- All New York City benchmarked buildings· Local Law 84 (LL84)
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Frequently asked questions
What is 21 Astor Place Condominium (21 Astor Place)'s energy grade?
21 Astor Place Condominium (21 Astor Place) did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 45.5 kBtu/ft².
How much energy does 21 Astor Place Condominium (21 Astor Place) use?
Its 2024 site energy-use intensity was 45.5 kBtu/ft² (111.0 kBtu/ft² source) across 129,129 sq ft, including 1,367,252 kWh of electricity and 12,086 therms of natural gas.
What are 21 Astor Place Condominium (21 Astor Place)'s carbon emissions?
21 Astor Place Condominium (21 Astor Place) reported 601 tCO₂e of greenhouse-gas emissions (4.7 kgCO₂e/ft²) for 2024.
Where is 21 Astor Place Condominium (21 Astor Place)?
21 Astor Place Condominium (21 Astor Place) is in New York City, New York 10003. Its coordinates are 40.72999, -73.99222 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 21 Astor Place Condominium (21 Astor Place) and when was it built?
21 Astor Place Condominium (21 Astor Place) has 129,129 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1930 as its year built. It is classed as multifamily housing.
Is 21 Astor Place Condominium (21 Astor Place) 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, “21 Astor Place Condominium (21 Astor Place), New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/21-astor-place-condominium-21-astor-place-2cf9402e (data as of October 2, 2026).