Prospect Park - Main
Residence Hall/Dormitory in New York City, NY · 357 Ninth St · 11215
At a glance
Prospect Park - Main is a 80,335-square-foot residence hall/dormitory at 357 Ninth St in New York City, New York, built in 1926. In its 2023 New York City benchmarking disclosure it reported a site energy-use intensity of 141.0 kBtu/ft² and 831 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 141.0 kBtu/ft² |
| Source EUI | 237.7 kBtu/ft² |
| GHG emissions | 831 tCO₂e |
| GHG intensity | 10.3 kgCO₂e/ft² |
| Electricity | 1,206,296 kWh |
| Natural gas | 72,124 therms |
| Water use | 6,581 kgal |
| Gross floor area | 80,335 sq ft |
| Source record | nyc:6227728:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | — | 141.0 kBtu/ft² | 831 tCO₂e | |
| 2022 | — | 154.4 kBtu/ft² | 797 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
- 357 Ninth St
- City
- New York City
- State
- New York
- ZIP
- 11215
- Coordinates
- 40.66842, -73.98475
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does Prospect Park - Main compare with other residence hall/dormitory buildings in New York City?
The latest disclosures cover 343 residence hall/dormitory buildings in New York City, out of 48,310 buildings citywide. Its site EUI of 141.0 kBtu/ft² is about 77% above the average of 79.6 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 10.3 kgCO₂e/ft² is about 87% above the group average of 5.5 kgCO₂e/ft².
At 80,335 sq ft, it is roughly in line with the average floor area of 85,583 sq ft for those buildings. It was built in 1926, 20 years earlier than the group's average year built (1947). Across all 24 jurisdictions BuildingCensus covers, the 702 residence hall/dormitory buildings average an ENERGY STAR score of 70 and a site EUI of 70.7 kBtu/ft².
How has Prospect Park - Main's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for Prospect Park - Main, covering report years 2022–2023. Site EUI moved from 154.4 kBtu/ft² (2022) to 141.0 kBtu/ft² (2023), a 9% decrease. Reported emissions went from 797 tCO₂e to 831 tCO₂e over the same span (up 4%).
What does a site EUI of 141.0 kBtu/ft² mean?
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. Prospect Park - Main's 141.0 kBtu/ft² across 80,335 sq ft works out to about 11.3 billion Btu (3,320 MWh-equivalent) in 2023. Its source EUI of 237.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,206,296 kWh of electricity, 72,124 therms of natural gas and 6,581 thousand gallons of water for the year.
Which law requires Prospect Park - Main to report its energy use?
Prospect Park - Main 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 2023 disclosure (source record nyc:6227728:2023). 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 residence hall/dormitory buildings in New York City
- Stabile Hall· 79,756 sq ft · score 56 (C)
- Barnard Plimpton Hall· 79,036 sq ft · score 59 (C)
- UTS McGiffert Hall· 78,397 sq ft · score 1 (D)
- Dexter House· 78,071 sq ft · score 57 (C)
- Brooks Hall· 77,505 sq ft · score 1 (D)
- 97 Columbia Heights· 77,088 sq ft
- Residence Hall/Dormitory buildings in New York City· 343 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 Prospect Park - Main's energy grade?
Prospect Park - Main did not report an ENERGY STAR score in its 2023 disclosure, but its site energy-use intensity was 141.0 kBtu/ft².
How much energy does Prospect Park - Main use?
Its 2023 site energy-use intensity was 141.0 kBtu/ft² (237.7 kBtu/ft² source) across 80,335 sq ft, including 1,206,296 kWh of electricity and 72,124 therms of natural gas.
What are Prospect Park - Main's carbon emissions?
Prospect Park - Main reported 831 tCO₂e of greenhouse-gas emissions (10.3 kgCO₂e/ft²) for 2023.
Where is Prospect Park - Main?
Prospect Park - Main is at 357 Ninth St, in New York City, New York 11215. Its coordinates are 40.66842, -73.98475 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Prospect Park - Main and when was it built?
Prospect Park - Main has 80,335 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1926 as its year built. It is classed as residence hall/dormitory.
Is Prospect Park - Main covered by Local Law 84 (LL84)?
Yes — it appears in the 2023 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, “Prospect Park - Main, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/prospect-park-main-95f6842a (data as of October 2, 2026).