42 West 48 Street
Office in New York City, NY · 10036
At a glance
42 West 48 Street is a 58,201-square-foot office building in New York City, New York, built in 1929. In its 2023 New York City benchmarking disclosure it reported an ENERGY STAR score of 72 out of 100 (grade B), a site energy-use intensity of 77.7 kBtu/ft² and 394 tCO₂e of greenhouse-gas emissions. That score is higher than 38% 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 | 72 (band B) |
| Site EUI | 77.7 kBtu/ft² |
| Source EUI | 164.9 kBtu/ft² |
| GHG emissions | 394 tCO₂e |
| GHG intensity | 6.8 kgCO₂e/ft² |
| Electricity | 812,409 kWh |
| Natural gas | 17,484 therms |
| Water use | 6,954 kgal |
| Gross floor area | 58,201 sq ft |
| Source record | nyc:20642932:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 72 | +1 | 77.7 kBtu/ft² | 394 tCO₂e |
| 2022 | 71 | 79.8 kBtu/ft² | 337 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
- 42 West 48 Street
- City
- New York City
- State
- New York
- ZIP
- 10036
- Coordinates
- 40.75806, -73.97997
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 42 West 48 Street 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. 42 West 48 Street's ENERGY STAR score of 72 compares with an average of 72 across the 2,519 that report a score; it scores higher than 38% of them and lower than 61%. Its site EUI of 77.7 kBtu/ft² is about 20% 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 58,201 sq ft, it is about 72% below the average floor area of 205,440 sq ft for those buildings. It was built in 1929, 11 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 42 West 48 Street's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for 42 West 48 Street, covering report years 2022–2023. Its ENERGY STAR score went from 71 in 2022 to 72 in 2023 (+1 points). Site EUI moved from 79.8 kBtu/ft² (2022) to 77.7 kBtu/ft² (2023), a 3% decrease. Reported emissions went from 337 tCO₂e to 394 tCO₂e over the same span (up 17%).
What does an ENERGY STAR score of 72 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 72 means the building performs better than about 72% of its national peers. BuildingCensus bands the score into report-card grades; 72 falls in band B — above median (70–84). It sits 3 points below 75, the threshold for ENERGY STAR certification. 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. 42 West 48 Street's 77.7 kBtu/ft² across 58,201 sq ft works out to about 4.5 billion Btu (1,325 MWh-equivalent) in 2023. Its source EUI of 164.9 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 812,409 kWh of electricity, 17,484 therms of natural gas and 6,954 thousand gallons of water for the year.
Which law requires 42 West 48 Street to report its energy use?
42 West 48 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 2023 disclosure (source record nyc:20642932:2023). 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
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- MS.320 E 94th St· 58,083 sq ft
- EL KAM 3 W 57· 58,001 sq ft · score 76 (B)
- 3 West 57 Street· 58,001 sq ft · score 90 (A)
- EL KAM 3 W 57· 58,001 sq ft · score 80 (B)
- 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 42 West 48 Street's energy grade?
42 West 48 Street scores 72 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 42 West 48 Street use?
Its 2023 site energy-use intensity was 77.7 kBtu/ft² (164.9 kBtu/ft² source) across 58,201 sq ft, including 812,409 kWh of electricity and 17,484 therms of natural gas.
What are 42 West 48 Street's carbon emissions?
42 West 48 Street reported 394 tCO₂e of greenhouse-gas emissions (6.8 kgCO₂e/ft²) for 2023.
Where is 42 West 48 Street?
42 West 48 Street is in New York City, New York 10036. Its coordinates are 40.75806, -73.97997 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 42 West 48 Street and when was it built?
42 West 48 Street has 58,201 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1929 as its year built. It is classed as office.
Is 42 West 48 Street 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, “42 West 48 Street, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/42-west-48-street-f6854da6 (data as of October 2, 2026).