K128, K721 Tandem (OECID: 0300136; BBL: 3063290032)
K-12 School in New York City, NY · 2075 84th Street · 11214
At a glance
K128, K721 Tandem (OECID: 0300136; BBL: 3063290032) is a 132,000-square-foot K-12 school at 2075 84th Street in New York City, New York, built in 1909. 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 47.8 kBtu/ft² and 487 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 | 47.8 kBtu/ft² |
| Source EUI | 82.6 kBtu/ft² |
| GHG emissions | 487 tCO₂e |
| GHG intensity | 3.7 kgCO₂e/ft² |
| Electricity | 716,968 kWh |
| Natural gas | 38,651 therms |
| Gross floor area | 132,000 sq ft |
| Source record | nyc:1633771:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 88 | +5 | 47.8 kBtu/ft² | 487 tCO₂e |
| 2023 | 83 | +2 | 58.7 kBtu/ft² | 556 tCO₂e |
| 2022 | 81 | 68.1 kBtu/ft² | 570 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
- 2075 84th Street
- City
- New York City
- State
- New York
- ZIP
- 11214
- Coordinates
- 40.60487, -73.99555
Within ~1 km
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- Dandale Gardens Inc.score 81
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- SUPERIOR: 30 Bay 29th Streetscore 94
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See also: most efficient in New York City · biggest emitters
How does K128, K721 Tandem (OECID: 0300136; BBL: 3063290032) 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. K128, K721 Tandem (OECID: 0300136; BBL: 3063290032)'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 47.8 kBtu/ft² is about 22% below 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 3.7 kgCO₂e/ft² is about 23% below the group average of 4.8 kgCO₂e/ft².
At 132,000 sq ft, it is about 30% above the average floor area of 101,338 sq ft for those buildings. It was built in 1909, 44 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 K128, K721 Tandem (OECID: 0300136; BBL: 3063290032)'s energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for K128, K721 Tandem (OECID: 0300136; BBL: 3063290032), covering report years 2022–2024. Its ENERGY STAR score went from 81 in 2022 to 88 in 2024 (+7 points). Site EUI moved from 68.1 kBtu/ft² (2022) to 47.8 kBtu/ft² (2024), a 30% decrease. Reported emissions went from 570 tCO₂e to 487 tCO₂e over the same span (down 15%).
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. K128, K721 Tandem (OECID: 0300136; BBL: 3063290032)'s 47.8 kBtu/ft² across 132,000 sq ft works out to about 6.3 billion Btu (1,849 MWh-equivalent) in 2024. Its source EUI of 82.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 716,968 kWh of electricity and 38,651 therms of natural gas for the year.
Which law requires K128, K721 Tandem (OECID: 0300136; BBL: 3063290032) to report its energy use?
K128, K721 Tandem (OECID: 0300136; BBL: 3063290032) 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:1633771:2024). 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
- X085, X885 (OECID: 0200124; BBL: 2030240021)· 131,644 sq ft · score 70 (B)
- X075 (OECID: 0200113; BBL: 2027470001)· 130,925 sq ft · score 77 (B)
- Q122 (OECID: 0400108; BBL: 4008800001)· 130,925 sq ft · score 64 (C)
- X066 (OECID: 0200103; BBL: 2030080001)· 130,925 sq ft · score 72 (B)
- K220 (OECID: 0300225; BBL: 3007780023)· 130,800 sq ft · score 64 (C)
- K105 (OECID: 0300115; BBL: 3057020001)· 130,800 sq ft · score 56 (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 K128, K721 Tandem (OECID: 0300136; BBL: 3063290032)'s energy grade?
K128, K721 Tandem (OECID: 0300136; BBL: 3063290032) 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 K128, K721 Tandem (OECID: 0300136; BBL: 3063290032) use?
Its 2024 site energy-use intensity was 47.8 kBtu/ft² (82.6 kBtu/ft² source) across 132,000 sq ft, including 716,968 kWh of electricity and 38,651 therms of natural gas.
What are K128, K721 Tandem (OECID: 0300136; BBL: 3063290032)'s carbon emissions?
K128, K721 Tandem (OECID: 0300136; BBL: 3063290032) reported 487 tCO₂e of greenhouse-gas emissions (3.7 kgCO₂e/ft²) for 2024.
Where is K128, K721 Tandem (OECID: 0300136; BBL: 3063290032)?
K128, K721 Tandem (OECID: 0300136; BBL: 3063290032) is at 2075 84th Street, in New York City, New York 11214. Its coordinates are 40.60487, -73.99555 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is K128, K721 Tandem (OECID: 0300136; BBL: 3063290032) and when was it built?
K128, K721 Tandem (OECID: 0300136; BBL: 3063290032) has 132,000 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1909 as its year built. It is classed as K-12 school.
Is K128, K721 Tandem (OECID: 0300136; BBL: 3063290032) 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, “K128, K721 Tandem (OECID: 0300136; BBL: 3063290032), New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/k128-k721-tandem-oecid-0300136-bbl-3063290032-fe9be564 (data as of October 2, 2026).