NYPL_4602_Epiphany Branch Library
Library in New York City, NY · 228 East 23rd St · 10010
At a glance
NYPL_4602_Epiphany Branch Library is a 13,615-square-foot library at 228 East 23rd St in New York City, New York, built in 1907. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 162.4 kBtu/ft² and 210 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 162.4 kBtu/ft² |
| Source EUI | 362.6 kBtu/ft² |
| GHG emissions | 210 tCO₂e |
| GHG intensity | 15.4 kgCO₂e/ft² |
| Electricity | 438,043 kWh |
| Natural gas | 7,161 therms |
| Gross floor area | 13,615 sq ft |
| Source record | nyc:21355481:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 162.4 kBtu/ft² | 210 tCO₂e | |
| 2023 | — | 148.2 kBtu/ft² | 176 tCO₂e | |
| 2022 | — | 144.7 kBtu/ft² | 135 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
- 228 East 23rd St
- City
- New York City
- State
- New York
- ZIP
- 10010
- Coordinates
- 40.73849, -73.98237
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does NYPL_4602_Epiphany 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 162.4 kBtu/ft² is about twice 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 15.4 kgCO₂e/ft² is about 137% above the group average of 6.5 kgCO₂e/ft².
At 13,615 sq ft, it is about 76% below the average floor area of 55,576 sq ft for those buildings. It was built in 1907, 40 years earlier than the group's average year built (1947).
How has NYPL_4602_Epiphany Branch Library's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for NYPL_4602_Epiphany Branch Library, covering report years 2022–2024. Site EUI moved from 144.7 kBtu/ft² (2022) to 162.4 kBtu/ft² (2024), an 12% increase. Reported emissions went from 135 tCO₂e to 210 tCO₂e over the same span (up 56%).
What does a site EUI of 162.4 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_4602_Epiphany Branch Library's 162.4 kBtu/ft² across 13,615 sq ft works out to about 2.2 billion Btu (648 MWh-equivalent) in 2024. Its source EUI of 362.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 438,043 kWh of electricity and 7,161 therms of natural gas for the year.
Which law requires NYPL_4602_Epiphany Branch Library to report its energy use?
NYPL_4602_Epiphany 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:21355481:2024). 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_4593_Aguilar Branch Library· 13,126 sq ft · EUI 43.1 kBtu/ft²
- NYPL_4608_Harlem Branch Library· 13,058 sq ft · EUI 106.0 kBtu/ft²
- NYPL_4662_Westchester Square Branch Library· 13,026 sq ft · EUI 109.9 kBtu/ft²
- NYPL_4617_Muhlenberg Branch Library· 12,953 sq ft · EUI 58.7 kBtu/ft²
- NYPL_9022_Kingsbridge Library· 12,812 sq ft · EUI 120.4 kBtu/ft²
- QPL_4753_Peninsula (ALC) Community Library· 12,750 sq ft · EUI 69.3 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_4602_Epiphany Branch Library's energy grade?
NYPL_4602_Epiphany Branch Library did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 162.4 kBtu/ft².
How much energy does NYPL_4602_Epiphany Branch Library use?
Its 2024 site energy-use intensity was 162.4 kBtu/ft² (362.6 kBtu/ft² source) across 13,615 sq ft, including 438,043 kWh of electricity and 7,161 therms of natural gas.
What are NYPL_4602_Epiphany Branch Library's carbon emissions?
NYPL_4602_Epiphany Branch Library reported 210 tCO₂e of greenhouse-gas emissions (15.4 kgCO₂e/ft²) for 2024.
Where is NYPL_4602_Epiphany Branch Library?
NYPL_4602_Epiphany Branch Library is at 228 East 23rd St, in New York City, New York 10010. Its coordinates are 40.73849, -73.98237 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is NYPL_4602_Epiphany Branch Library and when was it built?
NYPL_4602_Epiphany Branch Library has 13,615 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1907 as its year built. It is classed as library.
Is NYPL_4602_Epiphany 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_4602_Epiphany Branch Library, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/nypl-4602-epiphany-branch-library-2f462e8a (data as of October 2, 2026).