St. Mary's Home for Working Girls
Residence Hall/Dormitory in New York City, NY · 225 East 72nd Street · 10021
At a glance
St. Mary's Home for Working Girls is a 111,570-square-foot residence hall/dormitory at 225 East 72nd Street in New York City, New York, built in 1960. In its 2023 New York City benchmarking disclosure it reported an ENERGY STAR score of 89 out of 100 (grade A), a site energy-use intensity of 44.0 kBtu/ft² and 403 tCO₂e of greenhouse-gas emissions. That score is higher than 70% of the 177 scored residence hall/dormitory buildings in New York City.
Local Law 84 (LL84) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 89 (band A) |
| Site EUI | 44.0 kBtu/ft² |
| Source EUI | 78.9 kBtu/ft² |
| GHG emissions | 403 tCO₂e |
| GHG intensity | 3.6 kgCO₂e/ft² |
| Electricity | 534,090 kWh |
| Natural gas | 271 therms |
| Water use | 3,468 kgal |
| Gross floor area | 111,570 sq ft |
| Source record | nyc:2946993:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 89 | +20 | 44.0 kBtu/ft² | 403 tCO₂e |
| 2022 | 69 | 84.7 kBtu/ft² | 663 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
- 225 East 72nd Street
- City
- New York City
- State
- New York
- ZIP
- 10021
- Coordinates
- 40.76945, -73.95988
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does St. Mary's Home for Working Girls compare with other residence hall/dormitory buildings in New York City?
The latest disclosures cover 343 residence hall/dormitory buildings in New York City, out of 48,310 buildings citywide. St. Mary's Home for Working Girls's ENERGY STAR score of 89 compares with an average of 69 across the 177 that report a score; it scores higher than 70% of them and lower than 27%. Its site EUI of 44.0 kBtu/ft² is about 45% below the average of 79.6 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 3.6 kgCO₂e/ft² is about 35% below the group average of 5.5 kgCO₂e/ft².
At 111,570 sq ft, it is about 30% above the average floor area of 85,583 sq ft for those buildings. It was built in 1960, 14 years later than the group's average year built (1947). Across all 24 jurisdictions BuildingCensus covers, the 702 residence hall/dormitory buildings average an ENERGY STAR score of 70 and a site EUI of 70.7 kBtu/ft².
How has St. Mary's Home for Working Girls's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for St. Mary's Home for Working Girls, covering report years 2022–2023. Its ENERGY STAR score went from 69 in 2022 to 89 in 2023 (+20 points). Site EUI moved from 84.7 kBtu/ft² (2022) to 44.0 kBtu/ft² (2023), a 48% decrease. Reported emissions went from 663 tCO₂e to 403 tCO₂e over the same span (down 39%).
What does an ENERGY STAR score of 89 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 89 means the building performs better than about 89% of its national peers. BuildingCensus bands the score into report-card grades; 89 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. St. Mary's Home for Working Girls's 44.0 kBtu/ft² across 111,570 sq ft works out to about 4.9 billion Btu (1,439 MWh-equivalent) in 2023. Its source EUI of 78.9 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 534,090 kWh of electricity, 271 therms of natural gas and 3,468 thousand gallons of water for the year.
Which law requires St. Mary's Home for Working Girls to report its energy use?
St. Mary's Home for Working Girls 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:2946993:2023). 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.
More residence hall/dormitory buildings in New York City
- 55 John Street· 110,132 sq ft · score 50 (D)
- 55 John St.· 110,132 sq ft · EUI 104.7 kBtu/ft²
- International House - 524 Riverside Dr.· 110,111 sq ft · score 71 (B)
- DaSilva Hall· 107,805 sq ft
- Coed Hall· 107,633 sq ft · score 73 (B)
- 423 West 120th Street· 106,986 sq ft · score 100 (A)
- Residence Hall/Dormitory buildings in New York City· 343 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 St. Mary's Home for Working Girls's energy grade?
St. Mary's Home for Working Girls scores 89 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 St. Mary's Home for Working Girls use?
Its 2023 site energy-use intensity was 44.0 kBtu/ft² (78.9 kBtu/ft² source) across 111,570 sq ft, including 534,090 kWh of electricity and 271 therms of natural gas.
What are St. Mary's Home for Working Girls's carbon emissions?
St. Mary's Home for Working Girls reported 403 tCO₂e of greenhouse-gas emissions (3.6 kgCO₂e/ft²) for 2023.
Where is St. Mary's Home for Working Girls?
St. Mary's Home for Working Girls is at 225 East 72nd Street, in New York City, New York 10021. Its coordinates are 40.76945, -73.95988 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is St. Mary's Home for Working Girls and when was it built?
St. Mary's Home for Working Girls has 111,570 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1960 as its year built. It is classed as residence hall/dormitory.
Is St. Mary's Home for Working Girls 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, “St. Mary's Home for Working Girls, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/st-mary-s-home-for-working-girls-bf9528f6 (data as of October 2, 2026).