DCAS_1037_Brooklyn Borough Hall
Office in New York City, NY · 209 Joralemon St · 11201
At a glance
DCAS_1037_Brooklyn Borough Hall is a 50,000-square-foot office building at 209 Joralemon St in New York City, New York, built in 1846. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 91 out of 100 (grade A), a site energy-use intensity of 29.9 kBtu/ft² and 172 tCO₂e of greenhouse-gas emissions. That score is higher than 77% of the 2,519 scored office buildings in New York City.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 91 (band A) |
| Site EUI | 29.9 kBtu/ft² |
| Source EUI | 83.7 kBtu/ft² |
| GHG emissions | 172 tCO₂e |
| GHG intensity | 3.4 kgCO₂e/ft² |
| Electricity | 438,258 kWh |
| Gross floor area | 50,000 sq ft |
| Source record | nyc:21354469:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 91 | ±0 | 29.9 kBtu/ft² | 172 tCO₂e |
| 2023 | 91 | -3 | 28.7 kBtu/ft² | 156 tCO₂e |
| 2022 | 94 | 26.4 kBtu/ft² | 112 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
- 209 Joralemon St
- City
- New York City
- State
- New York
- ZIP
- 11201
- Coordinates
- 40.69248, -73.99049
Within ~1 km
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- 445 Gold Stscore —
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- 350 Jay Streetscore 54
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- JPMorgan Chase-4CMCscore 53
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See also: most efficient in New York City · biggest emitters
How does DCAS_1037_Brooklyn Borough Hall compare with other office buildings in New York City?
The latest disclosures cover 3,384 office buildings in New York City, out of 48,310 buildings citywide. DCAS_1037_Brooklyn Borough Hall's ENERGY STAR score of 91 compares with an average of 72 across the 2,519 that report a score; it scores higher than 77% of them and lower than 21%. Its site EUI of 29.9 kBtu/ft² is about half of the average of 64.5 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 41% below the group average of 5.8 kgCO₂e/ft².
At 50,000 sq ft, it is about 76% below the average floor area of 205,440 sq ft for those buildings. It was built in 1846, 94 years earlier than the group's average year built (1940). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has DCAS_1037_Brooklyn Borough Hall's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for DCAS_1037_Brooklyn Borough Hall, covering report years 2022–2024. Its ENERGY STAR score went from 94 in 2022 to 91 in 2024 (-3 points); its best year on file was 2022, at 94. Site EUI moved from 26.4 kBtu/ft² (2022) to 29.9 kBtu/ft² (2024), an 13% increase. Reported emissions went from 112 tCO₂e to 172 tCO₂e over the same span (up 54%).
What does an ENERGY STAR score of 91 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 91 means the building performs better than about 91% of its national peers. BuildingCensus bands the score into report-card grades; 91 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. DCAS_1037_Brooklyn Borough Hall's 29.9 kBtu/ft² across 50,000 sq ft works out to about 1.5 billion Btu (438 MWh-equivalent) in 2024. Its source EUI of 83.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 438,258 kWh of electricity for the year.
Which law requires DCAS_1037_Brooklyn Borough Hall to report its energy use?
DCAS_1037_Brooklyn Borough Hall 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:21354469:2024). 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.
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- Fieber Management : 103 COURT STREET· 49,515 sq ft · EUI 101.2 kBtu/ft²
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- Office buildings in New York City· 3,384 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_1037_Brooklyn Borough Hall's energy grade?
DCAS_1037_Brooklyn Borough Hall scores 91 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 DCAS_1037_Brooklyn Borough Hall use?
Its 2024 site energy-use intensity was 29.9 kBtu/ft² (83.7 kBtu/ft² source) across 50,000 sq ft, including 438,258 kWh of electricity.
What are DCAS_1037_Brooklyn Borough Hall's carbon emissions?
DCAS_1037_Brooklyn Borough Hall reported 172 tCO₂e of greenhouse-gas emissions (3.4 kgCO₂e/ft²) for 2024.
Where is DCAS_1037_Brooklyn Borough Hall?
DCAS_1037_Brooklyn Borough Hall is at 209 Joralemon St, in New York City, New York 11201. Its coordinates are 40.69248, -73.99049 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is DCAS_1037_Brooklyn Borough Hall and when was it built?
DCAS_1037_Brooklyn Borough Hall has 50,000 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1846 as its year built. It is classed as office.
Is DCAS_1037_Brooklyn Borough Hall 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_1037_Brooklyn Borough Hall, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/dcas-1037-brooklyn-borough-hall-f6c5e54b (data as of October 2, 2026).