38 REALTY CO
Office in New York City, NY · 21 W38TH STREET · 10018
At a glance
38 REALTY CO is a 68,827-square-foot office building at 21 W38TH STREET in New York City, New York, built in 1917. In its 2023 New York City benchmarking disclosure it reported an ENERGY STAR score of 78 out of 100 (grade B), a site energy-use intensity of 94.4 kBtu/ft² and 471 tCO₂e of greenhouse-gas emissions. That score is higher than 48% of the 2,519 scored office buildings in New York City.
Local Law 84 (LL84) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 78 (band B) |
| Site EUI | 94.4 kBtu/ft² |
| Source EUI | 156.7 kBtu/ft² |
| GHG emissions | 471 tCO₂e |
| GHG intensity | 6.8 kgCO₂e/ft² |
| Electricity | 663,092 kWh |
| Natural gas | 42,375 therms |
| Water use | 2,700 kgal |
| Gross floor area | 68,827 sq ft |
| Source record | nyc:2784250:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 78 | -18 | 94.4 kBtu/ft² | 471 tCO₂e |
| 2022 | 96 | 56.7 kBtu/ft² | 245 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
- 21 W38TH STREET
- City
- New York City
- State
- New York
- ZIP
- 10018
- Coordinates
- 40.75136, -73.98366
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 38 REALTY CO compare with other office buildings in New York City?
The latest disclosures cover 3,384 office buildings in New York City, out of 48,310 buildings citywide. 38 REALTY CO's ENERGY STAR score of 78 compares with an average of 72 across the 2,519 that report a score; it scores higher than 48% of them and lower than 50%. Its site EUI of 94.4 kBtu/ft² is about 46% above the average of 64.5 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 6.8 kgCO₂e/ft² is about 17% above the group average of 5.8 kgCO₂e/ft².
At 68,827 sq ft, it is about 66% below the average floor area of 205,440 sq ft for those buildings. It was built in 1917, 23 years earlier than the group's average year built (1940). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has 38 REALTY CO's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for 38 REALTY CO, covering report years 2022–2023. Its ENERGY STAR score went from 96 in 2022 to 78 in 2023 (-18 points); its best year on file was 2022, at 96. Site EUI moved from 56.7 kBtu/ft² (2022) to 94.4 kBtu/ft² (2023), an 66% increase. Reported emissions went from 245 tCO₂e to 471 tCO₂e over the same span (up 92%).
What does an ENERGY STAR score of 78 mean?
ENERGY STAR scores run from 1 to 100 and are computed by the EPA's Portfolio Manager as a percentile against similar buildings nationwide, adjusted for climate, size and use: a score of 78 means the building performs better than about 78% of its national peers. BuildingCensus bands the score into report-card grades; 78 falls in band B — above median (70–84). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. In New York City, 43% of scored buildings are at 75 or above.
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. 38 REALTY CO's 94.4 kBtu/ft² across 68,827 sq ft works out to about 6.5 billion Btu (1,904 MWh-equivalent) in 2023. Its source EUI of 156.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 663,092 kWh of electricity, 42,375 therms of natural gas and 2,700 thousand gallons of water for the year.
Which law requires 38 REALTY CO to report its energy use?
38 REALTY CO 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 2023 disclosure (source record nyc:2784250:2023). 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 office buildings in New York City
- Bohack Square· 68,823 sq ft · score 70 (B)
- 424 Madison Avenue· 68,669 sq ft · score 67 (C)
- Loria: 1-3 East 42nd Street (Taipei Economic and Cultural Office)· 68,625 sq ft · score 38 (D)
- Brooklyn Stages - 108 Jewel St· 68,600 sq ft · EUI 39.9 kBtu/ft²
- 464 West 44th Street· 68,579 sq ft
- 600 Broadway· 68,452 sq ft
- Office buildings in New York City· 3,384 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 38 REALTY CO's energy grade?
38 REALTY CO scores 78 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2023 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 38 REALTY CO use?
Its 2023 site energy-use intensity was 94.4 kBtu/ft² (156.7 kBtu/ft² source) across 68,827 sq ft, including 663,092 kWh of electricity and 42,375 therms of natural gas.
What are 38 REALTY CO's carbon emissions?
38 REALTY CO reported 471 tCO₂e of greenhouse-gas emissions (6.8 kgCO₂e/ft²) for 2023.
Where is 38 REALTY CO?
38 REALTY CO is at 21 W38TH STREET, in New York City, New York 10018. Its coordinates are 40.75136, -73.98366 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 38 REALTY CO and when was it built?
38 REALTY CO has 68,827 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1917 as its year built. It is classed as office.
Is 38 REALTY CO covered by Local Law 84 (LL84)?
Yes — it appears in the 2023 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, “38 REALTY CO, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/38-realty-co-3658dcde (data as of October 2, 2026).