Halbor Realty Co.-306
Multifamily Housing in New York City, NY · 306 West 93rd Street · 10025
At a glance
Halbor Realty Co.-306 is a 26,439-square-foot multifamily housing building at 306 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 100 out of 100 (grade A), a site energy-use intensity of 27.1 kBtu/ft² and 71 tCO₂e of greenhouse-gas emissions. That score is higher than 90% 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 | 100 (band A) |
| Site EUI | 27.1 kBtu/ft² |
| Source EUI | 63.7 kBtu/ft² |
| GHG emissions | 71 tCO₂e |
| GHG intensity | 2.7 kgCO₂e/ft² |
| Electricity | 156,108 kWh |
| Natural gas | 1,840 therms |
| Water use | 1,115 kgal |
| Gross floor area | 26,439 sq ft |
| Source record | nyc:6686108:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 100 | ±0 | 27.1 kBtu/ft² | 71 tCO₂e |
| 2023 | 100 | ±0 | 29.1 kBtu/ft² | 73 tCO₂e |
| 2022 | 100 | 30.8 kBtu/ft² | 62 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 West 93rd Street
- City
- New York City
- State
- New York
- ZIP
- 10025
- Coordinates
- 40.79346, -73.97495
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does Halbor Realty Co.-306 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 Co.-306's ENERGY STAR score of 100 compares with an average of 63 across the 22,829 that report a score; it scores higher than 90% of them. Its site EUI of 27.1 kBtu/ft² is about 64% below the average of 74.9 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 2.7 kgCO₂e/ft² is about half of the group average of 5.2 kgCO₂e/ft².
At 26,439 sq ft, it is about 74% below 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 Co.-306's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for Halbor Realty Co.-306, covering report years 2022–2024. Its ENERGY STAR score was 100 in both 2022 and 2024. Site EUI moved from 30.8 kBtu/ft² (2022) to 27.1 kBtu/ft² (2024), a 12% decrease. Reported emissions went from 62 tCO₂e to 71 tCO₂e over the same span (up 15%).
What does an ENERGY STAR score of 100 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: 100 is the top of the scale. BuildingCensus bands the score into report-card grades; 100 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. Halbor Realty Co.-306's 27.1 kBtu/ft² across 26,439 sq ft works out to about 0.7 billion Btu (210 MWh-equivalent) in 2024. Its source EUI of 63.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 156,108 kWh of electricity, 1,840 therms of natural gas and 1,115 thousand gallons of water for the year.
Which law requires Halbor Realty Co.-306 to report its energy use?
Halbor Realty Co.-306 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:6686108:2024). 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
- 1715 Caton Ave· 26,427 sq ft · score 32 (D)
- 507 West 111th Street· 26,424 sq ft · score 84 (B)
- 41 Bond Street· 26,413 sq ft · EUI 71.0 kBtu/ft²
- 41 Bond Street· 26,413 sq ft · EUI 73.3 kBtu/ft²
- 396 East 199 Street· 26,410 sq ft · score 100 (A)
- 42O EAST 82 STREET· 26,400 sq ft · score 82 (B)
- 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 Co.-306's energy grade?
Halbor Realty Co.-306 scores 100 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 Halbor Realty Co.-306 use?
Its 2024 site energy-use intensity was 27.1 kBtu/ft² (63.7 kBtu/ft² source) across 26,439 sq ft, including 156,108 kWh of electricity and 1,840 therms of natural gas.
What are Halbor Realty Co.-306's carbon emissions?
Halbor Realty Co.-306 reported 71 tCO₂e of greenhouse-gas emissions (2.7 kgCO₂e/ft²) for 2024.
Where is Halbor Realty Co.-306?
Halbor Realty Co.-306 is at 306 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 Co.-306 and when was it built?
Halbor Realty Co.-306 has 26,439 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 Co.-306 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 Co.-306, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/halbor-realty-co-306-45e688de (data as of October 2, 2026).