Cap X - 226 W Tremont Ave
Multifamily Housing in New York City, NY · 226 W Tremont Ave · 10453
At a glance
Cap X - 226 W Tremont Ave is a 54,000-square-foot multifamily housing building in New York City, New York, built in 1932. In its 2023 New York City benchmarking disclosure it reported an ENERGY STAR score of 87 out of 100 (grade A), a site energy-use intensity of 62.1 kBtu/ft² and 211 tCO₂e of greenhouse-gas emissions. That score is higher than 72% of the 22,829 scored multifamily housing buildings in New York City.
Local Law 84 (LL84) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 87 (band A) |
| Site EUI | 62.1 kBtu/ft² |
| Source EUI | 84.6 kBtu/ft² |
| GHG emissions | 211 tCO₂e |
| GHG intensity | 3.9 kgCO₂e/ft² |
| Electricity | 175,332 kWh |
| Natural gas | 27,538 therms |
| Water use | 5,933 kgal |
| Gross floor area | 54,000 sq ft |
| Source record | nyc:20314579:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 87 | -9 | 62.1 kBtu/ft² | 211 tCO₂e |
| 2022 | 96 | 52.3 kBtu/ft² | 170 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
- 226 W Tremont Ave
- City
- New York City
- State
- New York
- ZIP
- 10453
- Coordinates
- 40.85269, -73.91789
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does Cap X - 226 W Tremont 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. Cap X - 226 W Tremont Ave's ENERGY STAR score of 87 compares with an average of 63 across the 22,829 that report a score; it scores higher than 72% of them and lower than 26%. Its site EUI of 62.1 kBtu/ft² is about 17% 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 3.9 kgCO₂e/ft² is about 25% below the group average of 5.2 kgCO₂e/ft².
At 54,000 sq ft, it is about half of the average floor area of 100,951 sq ft for those buildings. It was built in 1932, 20 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 Cap X - 226 W Tremont Ave's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for Cap X - 226 W Tremont Ave, covering report years 2022–2023. Its ENERGY STAR score went from 96 in 2022 to 87 in 2023 (-9 points); its best year on file was 2022, at 96. Site EUI moved from 52.3 kBtu/ft² (2022) to 62.1 kBtu/ft² (2023), an 19% increase. Reported emissions went from 170 tCO₂e to 211 tCO₂e over the same span (up 24%).
What does an ENERGY STAR score of 87 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 87 means the building performs better than about 87% of its national peers. BuildingCensus bands the score into report-card grades; 87 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. Cap X - 226 W Tremont Ave's 62.1 kBtu/ft² across 54,000 sq ft works out to about 3.4 billion Btu (983 MWh-equivalent) in 2023. Its source EUI of 84.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 175,332 kWh of electricity, 27,538 therms of natural gas and 5,933 thousand gallons of water for the year.
Which law requires Cap X - 226 W Tremont Ave to report its energy use?
Cap X - 226 W Tremont 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 2023 disclosure (source record nyc:20314579:2023). 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 Cap X - 226 W Tremont Ave's energy grade?
Cap X - 226 W Tremont Ave scores 87 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2023 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Cap X - 226 W Tremont Ave use?
Its 2023 site energy-use intensity was 62.1 kBtu/ft² (84.6 kBtu/ft² source) across 54,000 sq ft, including 175,332 kWh of electricity and 27,538 therms of natural gas.
What are Cap X - 226 W Tremont Ave's carbon emissions?
Cap X - 226 W Tremont Ave reported 211 tCO₂e of greenhouse-gas emissions (3.9 kgCO₂e/ft²) for 2023.
Where is Cap X - 226 W Tremont Ave?
Cap X - 226 W Tremont Ave is in New York City, New York 10453. Its coordinates are 40.85269, -73.91789 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Cap X - 226 W Tremont Ave and when was it built?
Cap X - 226 W Tremont Ave has 54,000 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1932 as its year built. It is classed as multifamily housing.
Is Cap X - 226 W Tremont Ave covered by Local Law 84 (LL84)?
Yes — it appears in the 2023 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, “Cap X - 226 W Tremont Ave, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/cap-x-226-w-tremont-ave-d255bf39 (data as of October 2, 2026).