Alkal L.P.
Multifamily Housing in New York City, NY · 305 East 63rd Street · 10065
At a glance
Alkal L.P. is a 155,000-square-foot multifamily housing building at 305 East 63rd Street in New York City, New York, built in 1930. In its 2023 New York City benchmarking disclosure it reported an ENERGY STAR score of 74 out of 100 (grade B), a site energy-use intensity of 64.5 kBtu/ft² and 736 tCO₂e of greenhouse-gas emissions. That score is higher than 56% of the 22,829 scored multifamily housing buildings in New York City.
Local Law 84 (LL84) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 74 (band B) |
| Site EUI | 64.5 kBtu/ft² |
| Source EUI | 109.4 kBtu/ft² |
| GHG emissions | 736 tCO₂e |
| GHG intensity | 4.7 kgCO₂e/ft² |
| Electricity | 1,081,384 kWh |
| Natural gas | 63,062 therms |
| Water use | 4,244 kgal |
| Gross floor area | 155,000 sq ft |
| Source record | nyc:2737888:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 74 | +13 | 64.5 kBtu/ft² | 736 tCO₂e |
| 2022 | 61 | 72.3 kBtu/ft² | 746 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.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 305 East 63rd Street
- City
- New York City
- State
- New York
- ZIP
- 10065
- Coordinates
- 40.76300, -73.96223
Within ~1 km
Nearby benchmarked buildings
- NYP Cornell (East Campus)score 47
Hospital (General Medical & Surgical) · 2,801,795 sq ft
Other - Specialty Hospital · 2,490,355 sq ft
Mixed Use Property · 2,437,399 sq ft
- Weill Cornell Medical Centerscore —
Hospital (General Medical & Surgical) · 2,405,480 sq ft
Laboratory · 1,862,814 sq ft
Laboratory · 1,546,119 sq ft
See also: most efficient in New York City · biggest emitters
How does Alkal L.P. 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. Alkal L.P.'s ENERGY STAR score of 74 compares with an average of 63 across the 22,829 that report a score; it scores higher than 56% of them and lower than 43%. Its site EUI of 64.5 kBtu/ft² is about 14% 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 4.7 kgCO₂e/ft² is roughly in line with the group average of 5.2 kgCO₂e/ft².
At 155,000 sq ft, it is about 54% above the average floor area of 100,951 sq ft for those buildings. It was built in 1930, 22 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 Alkal L.P.'s energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for Alkal L.P., covering report years 2022–2023. Its ENERGY STAR score went from 61 in 2022 to 74 in 2023 (+13 points). Site EUI moved from 72.3 kBtu/ft² (2022) to 64.5 kBtu/ft² (2023), a 11% decrease. Reported emissions went from 746 tCO₂e to 736 tCO₂e over the same span (down 1%).
What does an ENERGY STAR score of 74 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 74 means the building performs better than about 74% of its national peers. BuildingCensus bands the score into report-card grades; 74 falls in band B — above median (70–84). It sits 1 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. Alkal L.P.'s 64.5 kBtu/ft² across 155,000 sq ft works out to about 10 billion Btu (2,930 MWh-equivalent) in 2023. Its source EUI of 109.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,081,384 kWh of electricity, 63,062 therms of natural gas and 4,244 thousand gallons of water for the year.
Which law requires Alkal L.P. to report its energy use?
Alkal L.P. 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:2737888:2023). 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 multifamily housing buildings in New York City
- Church Home· 154,962 sq ft · score 42 (D)
- OneVesta: 42-42 Colden St· 154,902 sq ft · score 41 (D)
- HUNTS POINT AVENUE REHAB· 154,900 sq ft · score 100 (A)
- Tenere: 118-60 Metropolitan Ave· 154,818 sq ft · score 93 (A)
- AKAM - 36 Sutton Place South· 154,762 sq ft · score 72 (B)
- 100 Eleventh Avenue - ENPG test· 154,709 sq ft
- 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 Alkal L.P.'s energy grade?
Alkal L.P. scores 74 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2023 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Alkal L.P. use?
Its 2023 site energy-use intensity was 64.5 kBtu/ft² (109.4 kBtu/ft² source) across 155,000 sq ft, including 1,081,384 kWh of electricity and 63,062 therms of natural gas.
What are Alkal L.P.'s carbon emissions?
Alkal L.P. reported 736 tCO₂e of greenhouse-gas emissions (4.7 kgCO₂e/ft²) for 2023.
Where is Alkal L.P.?
Alkal L.P. is at 305 East 63rd Street, in New York City, New York 10065. Its coordinates are 40.76300, -73.96223 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Alkal L.P. and when was it built?
Alkal L.P. has 155,000 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1930 as its year built. It is classed as multifamily housing.
Is Alkal L.P. 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).
Working with New York City building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Alkal L.P., New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/alkal-l-p-be3bfe23 (data as of October 2, 2026).