AEC 138 Realty LLC
Multifamily Housing in New York City, NY · 603 West 138th Street · 10031
At a glance
AEC 138 Realty LLC is a 31,554-square-foot multifamily housing building at 603 West 138th Street 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 27.4 kBtu/ft² and 77 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 | 27.4 kBtu/ft² |
| Source EUI | 56.7 kBtu/ft² |
| GHG emissions | 77 tCO₂e |
| GHG intensity | 2.4 kgCO₂e/ft² |
| Electricity | 147,613 kWh |
| Natural gas | 3,606 therms |
| Water use | 3,245 kgal |
| Gross floor area | 31,554 sq ft |
| Source record | nyc:6261109:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 100 | ±0 | 27.4 kBtu/ft² | 77 tCO₂e |
| 2023 | 100 | ±0 | 29.7 kBtu/ft² | 77 tCO₂e |
| 2022 | 100 | 29.4 kBtu/ft² | 64 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
- 603 West 138th Street
- City
- New York City
- State
- New York
- ZIP
- 10031
- Coordinates
- 40.82220, -73.95408
Within ~1 km
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How does AEC 138 Realty LLC 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. AEC 138 Realty LLC'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 27.4 kBtu/ft² is about 63% 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 2.4 kgCO₂e/ft² is about half of the group average of 5.2 kgCO₂e/ft².
At 31,554 sq ft, it is about 69% 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 AEC 138 Realty LLC's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for AEC 138 Realty LLC, covering report years 2022–2024. Its ENERGY STAR score was 100 in both 2022 and 2024. Site EUI moved from 29.4 kBtu/ft² (2022) to 27.4 kBtu/ft² (2024), a 7% decrease. Reported emissions went from 64 tCO₂e to 77 tCO₂e over the same span (up 20%).
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. AEC 138 Realty LLC's 27.4 kBtu/ft² across 31,554 sq ft works out to about 0.9 billion Btu (253 MWh-equivalent) in 2024. Its source EUI of 56.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 147,613 kWh of electricity, 3,606 therms of natural gas and 3,245 thousand gallons of water for the year.
Which law requires AEC 138 Realty LLC to report its energy use?
AEC 138 Realty LLC 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:6261109:2024). 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
- Wavecrest - 987 Union Avenue· 31,553 sq ft · score 90 (A)
- 987 Union Avenue· 31,553 sq ft · score 81 (B)
- CFF Consulting - 602 West 139th St· 31,550 sq ft · score 44 (D)
- 881 10th Avenue· 31,541 sq ft · score 2 (D)
- Quantum Property Management:40-24 76th Street· 31,537 sq ft · EUI 60.8 kBtu/ft²
- 233 18th St Condominium· 31,535 sq ft · score 80 (B)
- 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 AEC 138 Realty LLC's energy grade?
AEC 138 Realty LLC 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 AEC 138 Realty LLC use?
Its 2024 site energy-use intensity was 27.4 kBtu/ft² (56.7 kBtu/ft² source) across 31,554 sq ft, including 147,613 kWh of electricity and 3,606 therms of natural gas.
What are AEC 138 Realty LLC's carbon emissions?
AEC 138 Realty LLC reported 77 tCO₂e of greenhouse-gas emissions (2.4 kgCO₂e/ft²) for 2024.
Where is AEC 138 Realty LLC?
AEC 138 Realty LLC is at 603 West 138th Street, in New York City, New York 10031. Its coordinates are 40.82220, -73.95408 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is AEC 138 Realty LLC and when was it built?
AEC 138 Realty LLC has 31,554 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 AEC 138 Realty LLC 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, “AEC 138 Realty LLC, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/aec-138-realty-llc-9eb9924d (data as of October 2, 2026).