DCAS_1019_Harlem Courthouse
Courthouse in New York City, NY · 170 East 121st St · 10035
At a glance
DCAS_1019_Harlem Courthouse is a 25,700-square-foot courthouse building at 170 East 121st St in New York City, New York, built in 1891. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 16 out of 100 (grade D), a site energy-use intensity of 223.9 kBtu/ft² and 446 tCO₂e of greenhouse-gas emissions. That score is higher than 0% of the 26 scored courthouse buildings in New York City.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 16 (band D) |
| Site EUI | 223.9 kBtu/ft² |
| Source EUI | 260.2 kBtu/ft² |
| GHG emissions | 446 tCO₂e |
| GHG intensity | 17.4 kgCO₂e/ft² |
| Electricity | 143,197 kWh |
| Natural gas | 283 therms |
| Water use | 23 kgal |
| Gross floor area | 25,700 sq ft |
| Source record | nyc:21355192:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 16 | -81 | 223.9 kBtu/ft² | 446 tCO₂e |
| 2023 | 97 | +48 | 18.7 kBtu/ft² | 51 tCO₂e |
| 2022 | 49 | 133.4 kBtu/ft² | 259 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
- 170 East 121st St
- City
- New York City
- State
- New York
- ZIP
- 10035
- Coordinates
- 40.80142, -73.93837
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does DCAS_1019_Harlem Courthouse compare with other courthouse buildings in New York City?
The latest disclosures cover 31 courthouse buildings in New York City, out of 48,310 buildings citywide. DCAS_1019_Harlem Courthouse's ENERGY STAR score of 16 compares with an average of 70 across the 26 that report a score; it scores higher than 0% of them and lower than 96%. Its site EUI of 223.9 kBtu/ft² is about 197% above the average of 75.3 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 17.4 kgCO₂e/ft² is about 167% above the group average of 6.5 kgCO₂e/ft².
At 25,700 sq ft, it is about 93% below the average floor area of 373,862 sq ft for those buildings. It was built in 1891, 52 years earlier than the group's average year built (1943). Across all 24 jurisdictions BuildingCensus covers, the 178 courthouse buildings average an ENERGY STAR score of 62 and a site EUI of 76.2 kBtu/ft².
How has DCAS_1019_Harlem Courthouse's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for DCAS_1019_Harlem Courthouse, covering report years 2022–2024. Its ENERGY STAR score went from 49 in 2022 to 16 in 2024 (-33 points); its best year on file was 2023, at 97. Site EUI moved from 133.4 kBtu/ft² (2022) to 223.9 kBtu/ft² (2024), an 68% increase. Reported emissions went from 259 tCO₂e to 446 tCO₂e over the same span (up 73%).
What does an ENERGY STAR score of 16 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 16 means the building performs better than about 16% of its national peers. BuildingCensus bands the score into report-card grades; 16 falls in band D — lowest band (1–54). It sits 59 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. DCAS_1019_Harlem Courthouse's 223.9 kBtu/ft² across 25,700 sq ft works out to about 5.8 billion Btu (1,686 MWh-equivalent) in 2024. Its source EUI of 260.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 143,197 kWh of electricity, 283 therms of natural gas and 23 thousand gallons of water for the year.
Which law requires DCAS_1019_Harlem Courthouse to report its energy use?
DCAS_1019_Harlem Courthouse 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:21355192:2024). 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 courthouse buildings in New York City
- DCAS_3864_Staten Island Criminal Court· 21,500 sq ft · score 100 (A)
- DCAS_1053_Staten Island Civil Court· 18,000 sq ft · score 65 (C)
- DCAS_1055_Staten Island Family Court· 12,300 sq ft · score 54 (D)
- Courthouse buildings in New York City· 31 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 DCAS_1019_Harlem Courthouse's energy grade?
DCAS_1019_Harlem Courthouse scores 16 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does DCAS_1019_Harlem Courthouse use?
Its 2024 site energy-use intensity was 223.9 kBtu/ft² (260.2 kBtu/ft² source) across 25,700 sq ft, including 143,197 kWh of electricity and 283 therms of natural gas.
What are DCAS_1019_Harlem Courthouse's carbon emissions?
DCAS_1019_Harlem Courthouse reported 446 tCO₂e of greenhouse-gas emissions (17.4 kgCO₂e/ft²) for 2024.
Where is DCAS_1019_Harlem Courthouse?
DCAS_1019_Harlem Courthouse is at 170 East 121st St, in New York City, New York 10035. Its coordinates are 40.80142, -73.93837 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is DCAS_1019_Harlem Courthouse and when was it built?
DCAS_1019_Harlem Courthouse has 25,700 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1891 as its year built. It is classed as courthouse.
Is DCAS_1019_Harlem Courthouse 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, “DCAS_1019_Harlem Courthouse, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/dcas-1019-harlem-courthouse-ef50c418 (data as of October 2, 2026).