NYPL_4611_Jefferson Market Branch Library
Library in New York City, NY · 425 6th Ave · 10011
At a glance
NYPL_4611_Jefferson Market Branch Library is a 18,643-square-foot library at 425 6th Ave in New York City, New York, built in 1877. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 105.0 kBtu/ft² and 161 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 105.0 kBtu/ft² |
| Source EUI | 196.1 kBtu/ft² |
| GHG emissions | 161 tCO₂e |
| GHG intensity | 8.6 kgCO₂e/ft² |
| Electricity | 268,331 kWh |
| Natural gas | 10,412 therms |
| Water use | 263 kgal |
| Gross floor area | 18,643 sq ft |
| Source record | nyc:21355487:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 105.0 kBtu/ft² | 161 tCO₂e | |
| 2023 | — | 100.4 kBtu/ft² | 151 tCO₂e | |
| 2022 | — | 102.8 kBtu/ft² | 125 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
- 425 6th Ave
- City
- New York City
- State
- New York
- ZIP
- 10011
- Coordinates
- 40.73432, -73.99907
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does NYPL_4611_Jefferson Market 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 105.0 kBtu/ft² is about 35% above the average of 77.5 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 8.6 kgCO₂e/ft² is about 33% above the group average of 6.5 kgCO₂e/ft².
At 18,643 sq ft, it is about 66% below the average floor area of 55,576 sq ft for those buildings. It was built in 1877, 70 years earlier than the group's average year built (1947).
How has NYPL_4611_Jefferson Market Branch Library's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for NYPL_4611_Jefferson Market Branch Library, covering report years 2022–2024. Site EUI moved from 102.8 kBtu/ft² (2022) to 105.0 kBtu/ft² (2024), an 2% increase. Reported emissions went from 125 tCO₂e to 161 tCO₂e over the same span (up 29%).
What does a site EUI of 105.0 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_4611_Jefferson Market Branch Library's 105.0 kBtu/ft² across 18,643 sq ft works out to about 2 billion Btu (574 MWh-equivalent) in 2024. Its source EUI of 196.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 268,331 kWh of electricity, 10,412 therms of natural gas and 263 thousand gallons of water for the year.
Which law requires NYPL_4611_Jefferson Market Branch Library to report its energy use?
NYPL_4611_Jefferson Market 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:21355487:2024). 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
- NYPL_4649_Mott Haven Branch Library· 18,345 sq ft · EUI 34.7 kBtu/ft²
- 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
- 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_4611_Jefferson Market Branch Library's energy grade?
NYPL_4611_Jefferson Market Branch Library did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 105.0 kBtu/ft².
How much energy does NYPL_4611_Jefferson Market Branch Library use?
Its 2024 site energy-use intensity was 105.0 kBtu/ft² (196.1 kBtu/ft² source) across 18,643 sq ft, including 268,331 kWh of electricity and 10,412 therms of natural gas.
What are NYPL_4611_Jefferson Market Branch Library's carbon emissions?
NYPL_4611_Jefferson Market Branch Library reported 161 tCO₂e of greenhouse-gas emissions (8.6 kgCO₂e/ft²) for 2024.
Where is NYPL_4611_Jefferson Market Branch Library?
NYPL_4611_Jefferson Market Branch Library is at 425 6th Ave, in New York City, New York 10011. Its coordinates are 40.73432, -73.99907 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is NYPL_4611_Jefferson Market Branch Library and when was it built?
NYPL_4611_Jefferson Market Branch Library has 18,643 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1877 as its year built. It is classed as library.
Is NYPL_4611_Jefferson Market 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_4611_Jefferson Market Branch Library, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/nypl-4611-jefferson-market-branch-library-978aeb2a (data as of October 2, 2026).