320 East 23rd Street
Multifamily Housing in New York City, NY · 320 E. 23Rd Street · 10010
At a glance
320 East 23rd Street is a 153,800-square-foot multifamily housing building at 320 E. 23Rd Street in New York City, New York, built in 1965. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 105.2 kBtu/ft² and 1,358 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 105.2 kBtu/ft² |
| Source EUI | 187.6 kBtu/ft² |
| GHG emissions | 1,358 tCO₂e |
| GHG intensity | 8.8 kgCO₂e/ft² |
| Electricity | 1,730,252 kWh |
| Natural gas | 2,220 therms |
| Gross floor area | 153,800 sq ft |
| Source record | nyc:2800401:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 105.2 kBtu/ft² | 1,358 tCO₂e | |
| 2023 | 11 | -13 | 99.1 kBtu/ft² | 1,222 tCO₂e |
| 2022 | 24 | 89.4 kBtu/ft² | 1,002 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
- 320 E. 23Rd Street
- City
- New York City
- State
- New York
- ZIP
- 10010
- Coordinates
- 40.73757, -73.98018
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 320 East 23rd Street 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 105.2 kBtu/ft² is about 40% above the average of 74.9 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 8.8 kgCO₂e/ft² is about 70% above the group average of 5.2 kgCO₂e/ft².
At 153,800 sq ft, it is about 52% above the average floor area of 100,951 sq ft for those buildings. It was built in 1965, 13 years later 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 320 East 23rd Street's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 320 East 23rd Street, covering report years 2022–2024. Its ENERGY STAR score went from 24 in 2022 to 11 in 2023 (-13 points); its best year on file was 2022, at 24. Site EUI moved from 89.4 kBtu/ft² (2022) to 105.2 kBtu/ft² (2024), an 18% increase. Reported emissions went from 1,002 tCO₂e to 1,358 tCO₂e over the same span (up 36%).
What does a site EUI of 105.2 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. 320 East 23rd Street's 105.2 kBtu/ft² across 153,800 sq ft works out to about 16.2 billion Btu (4,742 MWh-equivalent) in 2024. Its source EUI of 187.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,730,252 kWh of electricity and 2,220 therms of natural gas for the year.
Which law requires 320 East 23rd Street to report its energy use?
320 East 23rd Street 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:2800401:2024). 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 multifamily housing buildings in New York City
- 2755-69 Sedgwick Avenue - Parent Property· 153,720 sq ft · score 64 (C)
- DEPM 2302 - 215 West 91st St· 153,700 sq ft · score 60 (C)
- Michael Young: 865 West End Ave· 153,656 sq ft · score 96 (A)
- Majestic: 63-84 Saunders Street· 153,606 sq ft · score 81 (B)
- Century - 29-45 Tenants Corp (Parent Prop)· 153,595 sq ft · score 88 (A)
- 270 W 96th Street· 153,590 sq ft · score 100 (A)
- 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 320 East 23rd Street's energy grade?
320 East 23rd Street did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 105.2 kBtu/ft².
How much energy does 320 East 23rd Street use?
Its 2024 site energy-use intensity was 105.2 kBtu/ft² (187.6 kBtu/ft² source) across 153,800 sq ft, including 1,730,252 kWh of electricity and 2,220 therms of natural gas.
What are 320 East 23rd Street's carbon emissions?
320 East 23rd Street reported 1,358 tCO₂e of greenhouse-gas emissions (8.8 kgCO₂e/ft²) for 2024.
Where is 320 East 23rd Street?
320 East 23rd Street is at 320 E. 23Rd Street, in New York City, New York 10010. Its coordinates are 40.73757, -73.98018 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 320 East 23rd Street and when was it built?
320 East 23rd Street has 153,800 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1965 as its year built. It is classed as multifamily housing.
Is 320 East 23rd Street 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, “320 East 23rd Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/320-east-23rd-street-cdef8977 (data as of October 2, 2026).