NYPL_4649_Mott Haven Branch Library
Library in New York City, NY · 321 East 140th St · 10454
At a glance
NYPL_4649_Mott Haven Branch Library is a 18,345-square-foot library at 321 East 140th St in New York City, New York, built in 1905. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 34.7 kBtu/ft² and 58 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 34.7 kBtu/ft² |
| Source EUI | 73.4 kBtu/ft² |
| GHG emissions | 58 tCO₂e |
| GHG intensity | 3.1 kgCO₂e/ft² |
| Electricity | 113,789 kWh |
| Natural gas | 2,475 therms |
| Water use | 221 kgal |
| Gross floor area | 18,345 sq ft |
| Source record | nyc:21355501:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 34.7 kBtu/ft² | 58 tCO₂e | |
| 2023 | — | 37.9 kBtu/ft² | 58 tCO₂e | |
| 2022 | — | 45.4 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
- 321 East 140th St
- City
- New York City
- State
- New York
- ZIP
- 10454
- Coordinates
- 40.81147, -73.92445
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does NYPL_4649_Mott Haven Branch Library compare with other library buildings in New York City?
The latest disclosures cover 110 library buildings in New York City, out of 48,310 buildings citywide. Its site EUI of 34.7 kBtu/ft² is about 55% below the average of 77.5 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 3.1 kgCO₂e/ft² is about half of the group average of 6.5 kgCO₂e/ft².
At 18,345 sq ft, it is about 67% below the average floor area of 55,576 sq ft for those buildings. It was built in 1905, 42 years earlier than the group's average year built (1947).
How has NYPL_4649_Mott Haven Branch Library's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for NYPL_4649_Mott Haven Branch Library, covering report years 2022–2024. Site EUI moved from 45.4 kBtu/ft² (2022) to 34.7 kBtu/ft² (2024), a 24% decrease. Reported emissions went from 62 tCO₂e to 58 tCO₂e over the same span (down 7%).
What does a site EUI of 34.7 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. NYPL_4649_Mott Haven Branch Library's 34.7 kBtu/ft² across 18,345 sq ft works out to about 0.6 billion Btu (187 MWh-equivalent) in 2024. Its source EUI of 73.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 113,789 kWh of electricity, 2,475 therms of natural gas and 221 thousand gallons of water for the year.
Which law requires NYPL_4649_Mott Haven Branch Library to report its energy use?
NYPL_4649_Mott Haven Branch Library 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:21355501:2024). 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 library buildings in New York City
- BPL_251_Kensington Branch Library· 18,300 sq ft · EUI 91.3 kBtu/ft²
- QPL_4745_Long Island City Community Library· 18,000 sq ft · EUI 90.8 kBtu/ft²
- NYPL_4627_St. Agnes Branch Library· 17,792 sq ft · EUI 101.8 kBtu/ft²
- NYPL_4610_Inwood Branch Library· 17,334 sq ft · EUI 0.0 kBtu/ft²
- NYPL_4631_Washington Heights Branch Library· 17,274 sq ft · EUI 78.7 kBtu/ft²
- NYPL_4644_Grand Concourse Branch Library· 16,874 sq ft · EUI 121.5 kBtu/ft²
- Library buildings in New York City· 110 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 NYPL_4649_Mott Haven Branch Library's energy grade?
NYPL_4649_Mott Haven Branch Library did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 34.7 kBtu/ft².
How much energy does NYPL_4649_Mott Haven Branch Library use?
Its 2024 site energy-use intensity was 34.7 kBtu/ft² (73.4 kBtu/ft² source) across 18,345 sq ft, including 113,789 kWh of electricity and 2,475 therms of natural gas.
What are NYPL_4649_Mott Haven Branch Library's carbon emissions?
NYPL_4649_Mott Haven Branch Library reported 58 tCO₂e of greenhouse-gas emissions (3.1 kgCO₂e/ft²) for 2024.
Where is NYPL_4649_Mott Haven Branch Library?
NYPL_4649_Mott Haven Branch Library is at 321 East 140th St, in New York City, New York 10454. Its coordinates are 40.81147, -73.92445 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is NYPL_4649_Mott Haven Branch Library and when was it built?
NYPL_4649_Mott Haven Branch Library has 18,345 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1905 as its year built. It is classed as library.
Is NYPL_4649_Mott Haven Branch Library 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, “NYPL_4649_Mott Haven Branch Library, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/nypl-4649-mott-haven-branch-library-274bc942 (data as of October 2, 2026).