M043 (OECID: 0100059; BBL: 1019840033)
K-12 School in New York City, NY · 509 West 129th Street · 10027
At a glance
M043 (OECID: 0100059; BBL: 1019840033) is a 151,280-square-foot K-12 school at 509 West 129th Street in New York City, New York, built in 1936. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 73 out of 100 (grade B), a site energy-use intensity of 69.5 kBtu/ft² and 758 tCO₂e of greenhouse-gas emissions. That score is higher than 54% 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 | 73 (band B) |
| Site EUI | 69.5 kBtu/ft² |
| Source EUI | 107.1 kBtu/ft² |
| GHG emissions | 758 tCO₂e |
| GHG intensity | 5.0 kgCO₂e/ft² |
| Electricity | 868,077 kWh |
| Natural gas | 67,956 therms |
| Gross floor area | 151,280 sq ft |
| Source record | nyc:1633231:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 73 | -2 | 69.5 kBtu/ft² | 758 tCO₂e |
| 2023 | 75 | +7 | 69.3 kBtu/ft² | 706 tCO₂e |
| 2022 | 68 | 86.4 kBtu/ft² | 790 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
- 509 West 129th Street
- City
- New York City
- State
- New York
- ZIP
- 10027
- Coordinates
- 40.81526, -73.95533
Within ~1 km
Nearby benchmarked buildings
- Benchmarking Group - 10score —
College/University · 3,385,955 sq ft
- GRANTscore 17
Multifamily Housing · 1,931,229 sq ft
- SAINT NICHOLASscore —
Multifamily Housing · 1,447,826 sq ft
- MANHATTANVILLEscore 13
Multifamily Housing · 1,443,550 sq ft
- 1470 Amsterdam Avenuescore 2
Multifamily Housing · 1,291,359 sq ft
- Manhattanville Campusscore —
College/University · 1,272,806 sq ft
See also: most efficient in New York City · biggest emitters
How does M043 (OECID: 0100059; BBL: 1019840033) 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. M043 (OECID: 0100059; BBL: 1019840033)'s ENERGY STAR score of 73 compares with an average of 64 across the 2,052 that report a score; it scores higher than 54% of them and lower than 44%. Its site EUI of 69.5 kBtu/ft² is about 13% above the average of 61.3 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 5.0 kgCO₂e/ft² is roughly in line with the group average of 4.8 kgCO₂e/ft².
At 151,280 sq ft, it is about 49% above the average floor area of 101,338 sq ft for those buildings. It was built in 1936, 17 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 M043 (OECID: 0100059; BBL: 1019840033)'s energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for M043 (OECID: 0100059; BBL: 1019840033), covering report years 2022–2024. Its ENERGY STAR score went from 68 in 2022 to 73 in 2024 (+5 points); its best year on file was 2023, at 75. Site EUI moved from 86.4 kBtu/ft² (2022) to 69.5 kBtu/ft² (2024), a 20% decrease. Reported emissions went from 790 tCO₂e to 758 tCO₂e over the same span (down 4%).
What does an ENERGY STAR score of 73 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 73 means the building performs better than about 73% of its national peers. BuildingCensus bands the score into report-card grades; 73 falls in band B — above median (70–84). It sits 2 points below 75, the threshold for ENERGY STAR certification. 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. M043 (OECID: 0100059; BBL: 1019840033)'s 69.5 kBtu/ft² across 151,280 sq ft works out to about 10.5 billion Btu (3,081 MWh-equivalent) in 2024. Its source EUI of 107.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 868,077 kWh of electricity and 67,956 therms of natural gas for the year.
Which law requires M043 (OECID: 0100059; BBL: 1019840033) to report its energy use?
M043 (OECID: 0100059; BBL: 1019840033) 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:1633231:2024). 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
- M149, M207 Tandem (OECID: 0100131; BBL: 1016010001)· 151,200 sq ft · score 86 (A)
- Q585 (OECID: 0401741; BBL: 4028030001)· 150,744 sq ft · score 48 (D)
- Q007 (OECID: 0401218; BBL: 4015380075)· 150,175 sq ft · score 60 (C)
- K395 (OECID: 0301769; BBL: 3050220002)· 150,000 sq ft · score 21 (D)
- 762 Wythe Ave· 150,000 sq ft · score 87 (A)
- Q093 (OECID: 0400085; BBL: 4034900001)· 150,000 sq ft · score 69 (C)
- 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 M043 (OECID: 0100059; BBL: 1019840033)'s energy grade?
M043 (OECID: 0100059; BBL: 1019840033) scores 73 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does M043 (OECID: 0100059; BBL: 1019840033) use?
Its 2024 site energy-use intensity was 69.5 kBtu/ft² (107.1 kBtu/ft² source) across 151,280 sq ft, including 868,077 kWh of electricity and 67,956 therms of natural gas.
What are M043 (OECID: 0100059; BBL: 1019840033)'s carbon emissions?
M043 (OECID: 0100059; BBL: 1019840033) reported 758 tCO₂e of greenhouse-gas emissions (5.0 kgCO₂e/ft²) for 2024.
Where is M043 (OECID: 0100059; BBL: 1019840033)?
M043 (OECID: 0100059; BBL: 1019840033) is at 509 West 129th Street, in New York City, New York 10027. Its coordinates are 40.81526, -73.95533 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is M043 (OECID: 0100059; BBL: 1019840033) and when was it built?
M043 (OECID: 0100059; BBL: 1019840033) has 151,280 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1936 as its year built. It is classed as K-12 school.
Is M043 (OECID: 0100059; BBL: 1019840033) 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, “M043 (OECID: 0100059; BBL: 1019840033), New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/m043-oecid-0100059-bbl-1019840033-51d2b808 (data as of October 2, 2026).