Halbor Realty Inc. 306-308
Multifamily Housing in New York City, NY · 306-308 West 93rd Street · 10025
At a glance
Halbor Realty Inc. 306-308 is a 52,976-square-foot multifamily housing building at 306-308 West 93rd Street in New York City, New York, built in 1927. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 65 out of 100 (grade C), a site energy-use intensity of 101.8 kBtu/ft² and 333 tCO₂e of greenhouse-gas emissions. That score is higher than 45% of the 22,829 scored multifamily housing buildings in New York City.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 65 (band C) |
| Site EUI | 101.8 kBtu/ft² |
| Source EUI | 131.9 kBtu/ft² |
| GHG emissions | 333 tCO₂e |
| GHG intensity | 6.3 kgCO₂e/ft² |
| Electricity | 221,862 kWh |
| Natural gas | 46,341 therms |
| Water use | 2,716 kgal |
| Gross floor area | 52,976 sq ft |
| Source record | nyc:15569049:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 65 | -2 | 101.8 kBtu/ft² | 333 tCO₂e |
| 2023 | 67 | -2 | 97.3 kBtu/ft² | 319 tCO₂e |
| 2022 | 69 | 101.1 kBtu/ft² | 311 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
- 306-308 West 93rd Street
- City
- New York City
- State
- New York
- ZIP
- 10025
- Coordinates
- 40.79346, -73.97495
Within ~1 km
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How does Halbor Realty Inc. 306-308 compare with other multifamily housing buildings in New York City?
The latest disclosures cover 33,022 multifamily housing buildings in New York City, out of 48,310 buildings citywide. Halbor Realty Inc. 306-308's ENERGY STAR score of 65 compares with an average of 63 across the 22,829 that report a score; it scores higher than 45% of them and lower than 54%. Its site EUI of 101.8 kBtu/ft² is about 36% above the average of 74.9 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 6.3 kgCO₂e/ft² is about 21% above the group average of 5.2 kgCO₂e/ft².
At 52,976 sq ft, it is about half of the average floor area of 100,951 sq ft for those buildings. It was built in 1927, 25 years earlier than the group's average year built (1952). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².
How has Halbor Realty Inc. 306-308's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for Halbor Realty Inc. 306-308, covering report years 2022–2024. Its ENERGY STAR score went from 69 in 2022 to 65 in 2024 (-4 points); its best year on file was 2022, at 69. Site EUI moved from 101.1 kBtu/ft² (2022) to 101.8 kBtu/ft² (2024), an 1% increase. Reported emissions went from 311 tCO₂e to 333 tCO₂e over the same span (up 7%).
What does an ENERGY STAR score of 65 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 65 means the building performs better than about 65% of its national peers. BuildingCensus bands the score into report-card grades; 65 falls in band C — below median (55–69). It sits 10 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. Halbor Realty Inc. 306-308's 101.8 kBtu/ft² across 52,976 sq ft works out to about 5.4 billion Btu (1,581 MWh-equivalent) in 2024. Its source EUI of 131.9 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 221,862 kWh of electricity, 46,341 therms of natural gas and 2,716 thousand gallons of water for the year.
Which law requires Halbor Realty Inc. 306-308 to report its energy use?
Halbor Realty Inc. 306-308 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:15569049:2024). 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 multifamily housing buildings in New York City
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- Marathon: 565 Prospect Pl· 52,965 sq ft · score 100 (A)
- Asti Condo (25-10 31st Ave)· 52,959 sq ft · score 98 (A)
- 101 Dyckman Street (Parent Property)· 52,959 sq ft · score 1 (D)
- Multifamily Housing buildings in New York City· 33,022 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 Halbor Realty Inc. 306-308's energy grade?
Halbor Realty Inc. 306-308 scores 65 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Halbor Realty Inc. 306-308 use?
Its 2024 site energy-use intensity was 101.8 kBtu/ft² (131.9 kBtu/ft² source) across 52,976 sq ft, including 221,862 kWh of electricity and 46,341 therms of natural gas.
What are Halbor Realty Inc. 306-308's carbon emissions?
Halbor Realty Inc. 306-308 reported 333 tCO₂e of greenhouse-gas emissions (6.3 kgCO₂e/ft²) for 2024.
Where is Halbor Realty Inc. 306-308?
Halbor Realty Inc. 306-308 is at 306-308 West 93rd Street, in New York City, New York 10025. Its coordinates are 40.79346, -73.97495 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Halbor Realty Inc. 306-308 and when was it built?
Halbor Realty Inc. 306-308 has 52,976 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1927 as its year built. It is classed as multifamily housing.
Is Halbor Realty Inc. 306-308 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, “Halbor Realty Inc. 306-308, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/halbor-realty-inc-306-308-1d49bdd7 (data as of October 2, 2026).