Trinity School
K-12 School in New York City, NY · 139 West 91st St · 10024
At a glance
Trinity School is a 202,283-square-foot K-12 school at 139 West 91st St in New York City, New York, built in 1900. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 88 out of 100 (grade A), a site energy-use intensity of 29.4 kBtu/ft² and 683 tCO₂e of greenhouse-gas emissions. That score is higher than 80% of the 2,052 scored K-12 school buildings in New York City.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 88 (band A) |
| Site EUI | 29.4 kBtu/ft² |
| Source EUI | 82.1 kBtu/ft² |
| GHG emissions | 683 tCO₂e |
| GHG intensity | 3.4 kgCO₂e/ft² |
| Electricity | 1,733,811 kWh |
| Natural gas | 336 therms |
| Water use | 249 kgal |
| Gross floor area | 202,283 sq ft |
| Source record | nyc:6654457:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 88 | +1 | 29.4 kBtu/ft² | 683 tCO₂e |
| 2023 | 87 | -8 | 29.6 kBtu/ft² | 649 tCO₂e |
| 2022 | 95 | 23.7 kBtu/ft² | 515 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
- 139 West 91st St
- City
- New York City
- State
- New York
- ZIP
- 10024
- Coordinates
- 40.79052, -73.97185
Within ~1 km
Nearby benchmarked buildings
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- DOUGLASS Iscore —
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Multifamily Housing · 689,897 sq ft
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See also: most efficient in New York City · biggest emitters
How does Trinity School compare with other K-12 school buildings in New York City?
The latest disclosures cover 2,301 K-12 school buildings in New York City, out of 48,310 buildings citywide. Trinity School's ENERGY STAR score of 88 compares with an average of 64 across the 2,052 that report a score; it scores higher than 80% of them and lower than 18%. Its site EUI of 29.4 kBtu/ft² is about half of the average of 61.3 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 3.4 kgCO₂e/ft² is about 30% below the group average of 4.8 kgCO₂e/ft².
At 202,283 sq ft, it is about twice the average floor area of 101,338 sq ft for those buildings. It was built in 1900, 53 years earlier than the group's average year built (1954). Across all 24 jurisdictions BuildingCensus covers, the 6,548 K-12 school buildings average an ENERGY STAR score of 64 and a site EUI of 52.7 kBtu/ft².
How has Trinity School's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for Trinity School, covering report years 2022–2024. Its ENERGY STAR score went from 95 in 2022 to 88 in 2024 (-7 points); its best year on file was 2022, at 95. Site EUI moved from 23.7 kBtu/ft² (2022) to 29.4 kBtu/ft² (2024), an 24% increase. Reported emissions went from 515 tCO₂e to 683 tCO₂e over the same span (up 33%).
What does an ENERGY STAR score of 88 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 88 means the building performs better than about 88% of its national peers. BuildingCensus bands the score into report-card grades; 88 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. Trinity School's 29.4 kBtu/ft² across 202,283 sq ft works out to about 5.9 billion Btu (1,743 MWh-equivalent) in 2024. Its source EUI of 82.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,733,811 kWh of electricity, 336 therms of natural gas and 249 thousand gallons of water for the year.
Which law requires Trinity School to report its energy use?
Trinity School 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:6654457:2024). 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 K-12 school buildings in New York City
- SJBTS: 5150 Hyland Blvd.· 201,900 sq ft · score 58 (C)
- X155 (OECID: 0200197; BBL: 2025780027)· 201,775 sq ft · score 56 (C)
- R440, R441 (OECID: 0500080; BBL: 5042440001)· 201,775 sq ft · score 81 (B)
- M282 (OECID: 0101624; BBL: 1000220013)· 200,000 sq ft · score 60 (C)
- X147 (OECID: 0200190; BBL: 2028970005)· 199,200 sq ft · score 72 (B)
- CUNY HCHS_328_Hunter College High School· 198,701 sq ft · score 27 (D)
- K-12 School buildings in New York City· 2,301 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 Trinity School's energy grade?
Trinity School scores 88 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 Trinity School use?
Its 2024 site energy-use intensity was 29.4 kBtu/ft² (82.1 kBtu/ft² source) across 202,283 sq ft, including 1,733,811 kWh of electricity and 336 therms of natural gas.
What are Trinity School's carbon emissions?
Trinity School reported 683 tCO₂e of greenhouse-gas emissions (3.4 kgCO₂e/ft²) for 2024.
Where is Trinity School?
Trinity School is at 139 West 91st St, in New York City, New York 10024. Its coordinates are 40.79052, -73.97185 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Trinity School and when was it built?
Trinity School has 202,283 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1900 as its year built. It is classed as K-12 school.
Is Trinity School 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, “Trinity School, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/trinity-school-9b40b0a0 (data as of October 2, 2026).