209 E 23
College/University in New York City, NY · 209 East 23rd Street · 10010
At a glance
209 E 23 is a 53,194-square-foot college/university building at 209 East 23rd Street in New York City, New York, built in 1918.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | — |
| Source EUI | — |
| GHG emissions | — |
| GHG intensity | — |
| Electricity | 617,343 kWh |
| Gross floor area | 53,194 sq ft |
| Source record | nyc:2440099:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | — | — | |
| 2023 | — | 90.8 kBtu/ft² | 332 tCO₂e | |
| 2022 | — | 92.5 kBtu/ft² | 289 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.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 209 East 23rd Street
- City
- New York City
- State
- New York
- ZIP
- 10010
- Coordinates
- 40.73864, -73.98268
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 209 E 23 compare with other college/university buildings in New York City?
The latest disclosures cover 553 college/university buildings in New York City, out of 48,310 buildings citywide.
At 53,194 sq ft, it is about 74% below the average floor area of 202,329 sq ft for those buildings. It was built in 1918, 29 years earlier than the group's average year built (1947). Across all 24 jurisdictions BuildingCensus covers, the 2,113 college/university buildings average an ENERGY STAR score of 68 and a site EUI of 98.7 kBtu/ft².
How has 209 E 23's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 209 E 23, covering report years 2022–2024. Site EUI moved from 92.5 kBtu/ft² (2022) to 90.8 kBtu/ft² (2023), a 2% decrease. Reported emissions went from 289 tCO₂e to 332 tCO₂e over the same span (up 15%).
Which law requires 209 E 23 to report its energy use?
209 E 23 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:2440099:2024). 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 college/university buildings in New York City
- Meyer / 713 Broadway· 53,116 sq ft
- Main Building, 215 Ryerson St· 52,880 sq ft · EUI 87.6 kBtu/ft²
- CUNY CC > KCC_445_Kingsborough CC: Temporary Building #4· 52,460 sq ft
- RH. Gabelli Hughes Hall· 52,384 sq ft
- RH. Gabelli Hughes Hall· 52,384 sq ft
- 606 W 122 St (Knox Hall)· 52,009 sq ft · EUI 49.5 kBtu/ft²
- College/University buildings in New York City· 553 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 209 E 23's energy grade?
209 E 23 did not report an ENERGY STAR score in its 2024 disclosure.
How much energy does 209 E 23 use?
No energy-use intensity was reported for 2024.
What are 209 E 23's carbon emissions?
No greenhouse-gas emissions figure was reported for 2024.
Where is 209 E 23?
209 E 23 is at 209 East 23rd Street, in New York City, New York 10010. Its coordinates are 40.73864, -73.98268 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 209 E 23 and when was it built?
209 E 23 has 53,194 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1918 as its year built. It is classed as college/university.
Is 209 E 23 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, “209 E 23, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/209-e-23-b15887f0 (data as of October 2, 2026).