42 Ann St
Multifamily Housing in New York City, NY · 10038
At a glance
42 Ann St is a 24,494-square-foot multifamily housing building in New York City, New York, built in 1900. In its 2023 New York City benchmarking disclosure it reported a site energy-use intensity of 55.5 kBtu/ft² and 110 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 55.5 kBtu/ft² |
| Source EUI | 107.2 kBtu/ft² |
| GHG emissions | 110 tCO₂e |
| GHG intensity | 4.5 kgCO₂e/ft² |
| Electricity | 200,523 kWh |
| Natural gas | 6,754 therms |
| Water use | 539 kgal |
| Gross floor area | 24,494 sq ft |
| Source record | nyc:33967797:2023 |
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
- 42 Ann St
- City
- New York City
- State
- New York
- ZIP
- 10038
- Coordinates
- 40.71039, -74.00702
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 42 Ann St 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. Its site EUI of 55.5 kBtu/ft² is about 26% 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 4.5 kgCO₂e/ft² is about 13% below the group average of 5.2 kgCO₂e/ft².
At 24,494 sq ft, it is about 76% below the average floor area of 100,951 sq ft for those buildings. It was built in 1900, 52 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.
What does a site EUI of 55.5 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. 42 Ann St's 55.5 kBtu/ft² across 24,494 sq ft works out to about 1.4 billion Btu (398 MWh-equivalent) in 2023. Its source EUI of 107.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 200,523 kWh of electricity, 6,754 therms of natural gas and 539 thousand gallons of water for the year.
Which law requires 42 Ann St to report its energy use?
42 Ann St 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:33967797:2023). 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.
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- 30-93 29th St· 24,440 sq ft · score 13 (D)
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- 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 42 Ann St's energy grade?
42 Ann St did not report an ENERGY STAR score in its 2023 disclosure, but its site energy-use intensity was 55.5 kBtu/ft².
How much energy does 42 Ann St use?
Its 2023 site energy-use intensity was 55.5 kBtu/ft² (107.2 kBtu/ft² source) across 24,494 sq ft, including 200,523 kWh of electricity and 6,754 therms of natural gas.
What are 42 Ann St's carbon emissions?
42 Ann St reported 110 tCO₂e of greenhouse-gas emissions (4.5 kgCO₂e/ft²) for 2023.
Where is 42 Ann St?
42 Ann St is in New York City, New York 10038. Its coordinates are 40.71039, -74.00702 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 42 Ann St and when was it built?
42 Ann St has 24,494 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1900 as its year built. It is classed as multifamily housing.
Is 42 Ann St 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, “42 Ann St, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/42-ann-st-afb20933 (data as of October 2, 2026).