Citi Apartments - 511 West 143rd St
Multifamily Housing in New York City, NY · 511 West 143rd St · 10031
At a glance
Citi Apartments - 511 West 143rd St is a 29,520-square-foot multifamily housing building in New York City, New York, built in 1920. 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 14.7 kBtu/ft² and 45 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 | 14.7 kBtu/ft² |
| Source EUI | 36.2 kBtu/ft² |
| GHG emissions | 45 tCO₂e |
| GHG intensity | 1.5 kgCO₂e/ft² |
| Electricity | 102,856 kWh |
| Natural gas | 822 therms |
| Water use | 1,461 kgal |
| Gross floor area | 29,520 sq ft |
| Source record | nyc:26656213:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 100 | +1 | 14.7 kBtu/ft² | 45 tCO₂e |
| 2023 | 99 | +29 | 36.9 kBtu/ft² | 78 tCO₂e |
| 2022 | 70 | 82.0 kBtu/ft² | 139 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
- 511 West 143rd St
- City
- New York City
- State
- New York
- ZIP
- 10031
- Coordinates
- 40.82438, -73.94958
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does Citi Apartments - 511 West 143rd 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. Citi Apartments - 511 West 143rd St'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 14.7 kBtu/ft² is about 80% 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 1.5 kgCO₂e/ft² is about 71% below the group average of 5.2 kgCO₂e/ft².
At 29,520 sq ft, it is about 71% below the average floor area of 100,951 sq ft for those buildings. It was built in 1920, 32 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 Citi Apartments - 511 West 143rd St's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for Citi Apartments - 511 West 143rd St, covering report years 2022–2024. Its ENERGY STAR score went from 70 in 2022 to 100 in 2024 (+30 points). Site EUI moved from 82.0 kBtu/ft² (2022) to 14.7 kBtu/ft² (2024), a 82% decrease. Reported emissions went from 139 tCO₂e to 45 tCO₂e over the same span (down 68%).
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. Citi Apartments - 511 West 143rd St's 14.7 kBtu/ft² across 29,520 sq ft works out to about 0.4 billion Btu (127 MWh-equivalent) in 2024. Its source EUI of 36.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 102,856 kWh of electricity, 822 therms of natural gas and 1,461 thousand gallons of water for the year.
Which law requires Citi Apartments - 511 West 143rd St to report its energy use?
Citi Apartments - 511 West 143rd 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:26656213:2024). 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
- Diamond: 84 W 188th St· 29,516 sq ft · score 54 (D)
- 951 Woodycrest Avenue· 29,510 sq ft · score 66 (C)
- Cornerstone Management Systems Inc : 3 Wooster Street· 29,503 sq ft · EUI 93.3 kBtu/ft²
- KSP Realty LLC· 29,500 sq ft · score 100 (A)
- Jamie's Place 1· 29,500 sq ft · score 73 (B)
- 117 E 77 St· 29,500 sq ft · score 28 (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
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Frequently asked questions
What is Citi Apartments - 511 West 143rd St's energy grade?
Citi Apartments - 511 West 143rd St 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 Citi Apartments - 511 West 143rd St use?
Its 2024 site energy-use intensity was 14.7 kBtu/ft² (36.2 kBtu/ft² source) across 29,520 sq ft, including 102,856 kWh of electricity and 822 therms of natural gas.
What are Citi Apartments - 511 West 143rd St's carbon emissions?
Citi Apartments - 511 West 143rd St reported 45 tCO₂e of greenhouse-gas emissions (1.5 kgCO₂e/ft²) for 2024.
Where is Citi Apartments - 511 West 143rd St?
Citi Apartments - 511 West 143rd St is in New York City, New York 10031. Its coordinates are 40.82438, -73.94958 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Citi Apartments - 511 West 143rd St and when was it built?
Citi Apartments - 511 West 143rd St has 29,520 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1920 as its year built. It is classed as multifamily housing.
Is Citi Apartments - 511 West 143rd 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, “Citi Apartments - 511 West 143rd St, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/citi-apartments-511-west-143rd-st-d6b6878f (data as of October 2, 2026).