The Ashley - 400 W 63 ST
Multifamily Housing in New York City, NY · 400 WEST 63 STREET · 10069
At a glance
The Ashley - 400 W 63 ST is a 253,788-square-foot multifamily housing building at 400 WEST 63 STREET in New York City, New York, built in 2010. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 23 out of 100 (grade D), a site energy-use intensity of 75.5 kBtu/ft² and 1,559 tCO₂e of greenhouse-gas emissions. That score is higher than 13% 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 | 23 (band D) |
| Site EUI | 75.5 kBtu/ft² |
| Source EUI | 138.7 kBtu/ft² |
| GHG emissions | 1,559 tCO₂e |
| GHG intensity | 6.1 kgCO₂e/ft² |
| Electricity | 2,530,166 kWh |
| Natural gas | 102,359 therms |
| Water use | 8,135 kgal |
| Gross floor area | 253,788 sq ft |
| Source record | nyc:5275361:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 23 | -2 | 75.5 kBtu/ft² | 1,559 tCO₂e |
| 2023 | 25 | -24 | 77.0 kBtu/ft² | 1,491 tCO₂e |
| 2022 | 49 | 70.7 kBtu/ft² | 1,175 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
- 400 WEST 63 STREET
- City
- New York City
- State
- New York
- ZIP
- 10069
- Coordinates
- 40.77466, -73.98995
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does The Ashley - 400 W 63 ST 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. The Ashley - 400 W 63 ST's ENERGY STAR score of 23 compares with an average of 63 across the 22,829 that report a score; it scores higher than 13% of them and lower than 86%. Its site EUI of 75.5 kBtu/ft² is roughly in line with the average of 74.9 kBtu/ft². Its emissions intensity of 6.1 kgCO₂e/ft² is about 18% above the group average of 5.2 kgCO₂e/ft².
At 253,788 sq ft, it is about 151% above the average floor area of 100,951 sq ft for those buildings. It was built in 2010, 58 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 The Ashley - 400 W 63 ST's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for The Ashley - 400 W 63 ST, covering report years 2022–2024. Its ENERGY STAR score went from 49 in 2022 to 23 in 2024 (-26 points); its best year on file was 2022, at 49. Site EUI moved from 70.7 kBtu/ft² (2022) to 75.5 kBtu/ft² (2024), an 7% increase. Reported emissions went from 1,175 tCO₂e to 1,559 tCO₂e over the same span (up 33%).
What does an ENERGY STAR score of 23 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 23 means the building performs better than about 23% of its national peers. BuildingCensus bands the score into report-card grades; 23 falls in band D — lowest band (1–54). It sits 52 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. The Ashley - 400 W 63 ST's 75.5 kBtu/ft² across 253,788 sq ft works out to about 19.2 billion Btu (5,616 MWh-equivalent) in 2024. Its source EUI of 138.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,530,166 kWh of electricity, 102,359 therms of natural gas and 8,135 thousand gallons of water for the year.
Which law requires The Ashley - 400 W 63 ST to report its energy use?
The Ashley - 400 W 63 ST 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:5275361:2024). 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.
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- 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 The Ashley - 400 W 63 ST's energy grade?
The Ashley - 400 W 63 ST scores 23 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does The Ashley - 400 W 63 ST use?
Its 2024 site energy-use intensity was 75.5 kBtu/ft² (138.7 kBtu/ft² source) across 253,788 sq ft, including 2,530,166 kWh of electricity and 102,359 therms of natural gas.
What are The Ashley - 400 W 63 ST's carbon emissions?
The Ashley - 400 W 63 ST reported 1,559 tCO₂e of greenhouse-gas emissions (6.1 kgCO₂e/ft²) for 2024.
Where is The Ashley - 400 W 63 ST?
The Ashley - 400 W 63 ST is at 400 WEST 63 STREET, in New York City, New York 10069. Its coordinates are 40.77466, -73.98995 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is The Ashley - 400 W 63 ST and when was it built?
The Ashley - 400 W 63 ST has 253,788 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2010 as its year built. It is classed as multifamily housing.
Is The Ashley - 400 W 63 ST 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, “The Ashley - 400 W 63 ST, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/the-ashley-400-w-63-st-63eebd34 (data as of October 2, 2026).