Citadel: 1635 Lexington Ave
Multifamily Housing in New York City, NY · 1635 Lexington Ave · 10029
At a glance
Citadel: 1635 Lexington Ave is a 55,406-square-foot multifamily housing building in New York City, New York, built in 2013. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 7 out of 100 (grade D), a site energy-use intensity of 70.7 kBtu/ft² and 383 tCO₂e of greenhouse-gas emissions. That score is higher than 6% 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 | 7 (band D) |
| Site EUI | 70.7 kBtu/ft² |
| Source EUI | 163.2 kBtu/ft² |
| GHG emissions | 383 tCO₂e |
| GHG intensity | 6.9 kgCO₂e/ft² |
| Electricity | 825,223 kWh |
| Natural gas | 11,032 therms |
| Gross floor area | 55,406 sq ft |
| Source record | nyc:6075359:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 7 | -1 | 70.7 kBtu/ft² | 383 tCO₂e |
| 2023 | 8 | +5 | 71.0 kBtu/ft² | 357 tCO₂e |
| 2022 | 3 | 99.2 kBtu/ft² | 379 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
- 1635 Lexington Ave
- City
- New York City
- State
- New York
- ZIP
- 10029
- Coordinates
- 40.79050, -73.94754
Within ~1 km
Nearby benchmarked buildings
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- Franklin Plaza 1656score 1
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See also: most efficient in New York City · biggest emitters
How does Citadel: 1635 Lexington Ave 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. Citadel: 1635 Lexington Ave's ENERGY STAR score of 7 compares with an average of 63 across the 22,829 that report a score; it scores higher than 6% of them and lower than 94%. Its site EUI of 70.7 kBtu/ft² is roughly in line with 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 6.9 kgCO₂e/ft² is about 33% above the group average of 5.2 kgCO₂e/ft².
At 55,406 sq ft, it is about half of the average floor area of 100,951 sq ft for those buildings. It was built in 2013, 61 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 Citadel: 1635 Lexington Ave's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for Citadel: 1635 Lexington Ave, covering report years 2022–2024. Its ENERGY STAR score went from 3 in 2022 to 7 in 2024 (+4 points); its best year on file was 2023, at 8. Site EUI moved from 99.2 kBtu/ft² (2022) to 70.7 kBtu/ft² (2024), a 29% decrease. Reported emissions went from 379 tCO₂e to 383 tCO₂e over the same span (up 1%).
What does an ENERGY STAR score of 7 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 7 means the building performs better than about 7% of its national peers. BuildingCensus bands the score into report-card grades; 7 falls in band D — lowest band (1–54). It sits 68 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. Citadel: 1635 Lexington Ave's 70.7 kBtu/ft² across 55,406 sq ft works out to about 3.9 billion Btu (1,148 MWh-equivalent) in 2024. Its source EUI of 163.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 825,223 kWh of electricity and 11,032 therms of natural gas for the year.
Which law requires Citadel: 1635 Lexington Ave to report its energy use?
Citadel: 1635 Lexington Ave 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:6075359:2024). 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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Frequently asked questions
What is Citadel: 1635 Lexington Ave's energy grade?
Citadel: 1635 Lexington Ave scores 7 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 Citadel: 1635 Lexington Ave use?
Its 2024 site energy-use intensity was 70.7 kBtu/ft² (163.2 kBtu/ft² source) across 55,406 sq ft, including 825,223 kWh of electricity and 11,032 therms of natural gas.
What are Citadel: 1635 Lexington Ave's carbon emissions?
Citadel: 1635 Lexington Ave reported 383 tCO₂e of greenhouse-gas emissions (6.9 kgCO₂e/ft²) for 2024.
Where is Citadel: 1635 Lexington Ave?
Citadel: 1635 Lexington Ave is in New York City, New York 10029. Its coordinates are 40.79050, -73.94754 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Citadel: 1635 Lexington Ave and when was it built?
Citadel: 1635 Lexington Ave has 55,406 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2013 as its year built. It is classed as multifamily housing.
Is Citadel: 1635 Lexington Ave 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, “Citadel: 1635 Lexington Ave, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/citadel-1635-lexington-ave-e0cc3b3f (data as of October 2, 2026).