Halstead - 309 East 49th Street
Multifamily Housing in New York City, NY · 309 EAST 49 STREET · 10017
At a glance
Halstead - 309 East 49th Street is a 136,680-square-foot multifamily housing building at 309 EAST 49 STREET in New York City, New York, built in 1982. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 45 out of 100 (grade D), a site energy-use intensity of 78.8 kBtu/ft² and 894 tCO₂e of greenhouse-gas emissions. That score is higher than 28% 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 | 45 (band D) |
| Site EUI | 78.8 kBtu/ft² |
| Source EUI | 109.1 kBtu/ft² |
| GHG emissions | 894 tCO₂e |
| GHG intensity | 6.5 kgCO₂e/ft² |
| Electricity | 660,447 kWh |
| Natural gas | 1,292 therms |
| Water use | 6,158 kgal |
| Gross floor area | 136,680 sq ft |
| Source record | nyc:4034900:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 45 | +7 | 78.8 kBtu/ft² | 894 tCO₂e |
| 2023 | 38 | +5 | 82.1 kBtu/ft² | 886 tCO₂e |
| 2022 | 33 | 92.1 kBtu/ft² | 932 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
- 309 EAST 49 STREET
- City
- New York City
- State
- New York
- ZIP
- 10017
- Coordinates
- 40.75405, -73.96849
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does Halstead - 309 East 49th Street 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. Halstead - 309 East 49th Street's ENERGY STAR score of 45 compares with an average of 63 across the 22,829 that report a score; it scores higher than 28% of them and lower than 72%. Its site EUI of 78.8 kBtu/ft² is roughly in line with the average of 74.9 kBtu/ft². Its emissions intensity of 6.5 kgCO₂e/ft² is about 26% above the group average of 5.2 kgCO₂e/ft².
At 136,680 sq ft, it is about 35% above the average floor area of 100,951 sq ft for those buildings. It was built in 1982, 30 years later 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 Halstead - 309 East 49th Street's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for Halstead - 309 East 49th Street, covering report years 2022–2024. Its ENERGY STAR score went from 33 in 2022 to 45 in 2024 (+12 points). Site EUI moved from 92.1 kBtu/ft² (2022) to 78.8 kBtu/ft² (2024), a 14% decrease. Reported emissions went from 932 tCO₂e to 894 tCO₂e over the same span (down 4%).
What does an ENERGY STAR score of 45 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 45 means the building performs better than about 45% of its national peers. BuildingCensus bands the score into report-card grades; 45 falls in band D — lowest band (1–54). It sits 30 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. Halstead - 309 East 49th Street's 78.8 kBtu/ft² across 136,680 sq ft works out to about 10.8 billion Btu (3,156 MWh-equivalent) in 2024. Its source EUI of 109.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 660,447 kWh of electricity, 1,292 therms of natural gas and 6,158 thousand gallons of water for the year.
Which law requires Halstead - 309 East 49th Street to report its energy use?
Halstead - 309 East 49th Street 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:4034900:2024). 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
- 419 East 57th Street· 136,655 sq ft · score 89 (A)
- 419 East 57th Street (419 East 57th Street)· 136,655 sq ft · score 94 (A)
- 2 Beekman Place Owners Corp. (2 Beekman Place)· 136,647 sq ft · score 74 (B)
- Orsid - 127 West 79th Street· 136,628 sq ft · score 87 (A)
- Kips Bay Court - 520 2nd Avenue· 136,608 sq ft
- Feil - 1700 York Avenue· 136,598 sq ft · score 52 (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 Halstead - 309 East 49th Street's energy grade?
Halstead - 309 East 49th Street scores 45 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 Halstead - 309 East 49th Street use?
Its 2024 site energy-use intensity was 78.8 kBtu/ft² (109.1 kBtu/ft² source) across 136,680 sq ft, including 660,447 kWh of electricity and 1,292 therms of natural gas.
What are Halstead - 309 East 49th Street's carbon emissions?
Halstead - 309 East 49th Street reported 894 tCO₂e of greenhouse-gas emissions (6.5 kgCO₂e/ft²) for 2024.
Where is Halstead - 309 East 49th Street?
Halstead - 309 East 49th Street is at 309 EAST 49 STREET, in New York City, New York 10017. Its coordinates are 40.75405, -73.96849 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Halstead - 309 East 49th Street and when was it built?
Halstead - 309 East 49th Street has 136,680 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1982 as its year built. It is classed as multifamily housing.
Is Halstead - 309 East 49th Street 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, “Halstead - 309 East 49th Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/halstead-309-east-49th-street-e155d77d (data as of October 2, 2026).