148 Mad LLC
Office in New York City, NY · 148 Madison Avenue · 10016
At a glance
148 Mad LLC is a 71,871-square-foot office building at 148 Madison Avenue in New York City, New York, built in 1917. In its 2023 New York City benchmarking disclosure it reported an ENERGY STAR score of 48 out of 100 (grade D), a site energy-use intensity of 77.1 kBtu/ft² and 510 tCO₂e of greenhouse-gas emissions. That score is higher than 15% 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 | 48 (band D) |
| Site EUI | 77.1 kBtu/ft² |
| Source EUI | 172.4 kBtu/ft² |
| GHG emissions | 510 tCO₂e |
| GHG intensity | 7.1 kgCO₂e/ft² |
| Electricity | 1,079,443 kWh |
| Natural gas | 10,506 therms |
| Water use | 4,838 kgal |
| Gross floor area | 71,871 sq ft |
| Source record | nyc:4845123:2023 |
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
- 148 Madison Avenue
- City
- New York City
- State
- New York
- ZIP
- 10016
- Coordinates
- 40.74634, -73.98401
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 148 Mad LLC 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. 148 Mad LLC's ENERGY STAR score of 48 compares with an average of 72 across the 2,519 that report a score; it scores higher than 15% of them and lower than 84%. Its site EUI of 77.1 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 7.1 kgCO₂e/ft² is about 22% above the group average of 5.8 kgCO₂e/ft².
At 71,871 sq ft, it is about 65% 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.
What does an ENERGY STAR score of 48 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 48 means the building performs better than about 48% of its national peers. BuildingCensus bands the score into report-card grades; 48 falls in band D — lowest band (1–54). It sits 27 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. 148 Mad LLC's 77.1 kBtu/ft² across 71,871 sq ft works out to about 5.5 billion Btu (1,624 MWh-equivalent) in 2023. Its source EUI of 172.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,079,443 kWh of electricity, 10,506 therms of natural gas and 4,838 thousand gallons of water for the year.
Which law requires 148 Mad LLC to report its energy use?
148 Mad LLC 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:4845123:2023). 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
- AAG: 421 7th Avenue· 71,811 sq ft · EUI 105.8 kBtu/ft²
- Steel Equities - 110-01 14th Ave· 71,798 sq ft · score 71 (B)
- 32-36 Cooper Square (Parent Property)· 71,755 sq ft · EUI 58.8 kBtu/ft²
- Cornerstone: 37-41 East 18th Street· 71,745 sq ft · score 98 (A)
- 136-68 Roosevelt Avenue· 71,650 sq ft · score 81 (B)
- 20 West 36th Street· 71,534 sq ft · score 69 (C)
- 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 148 Mad LLC's energy grade?
148 Mad LLC scores 48 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2023 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 148 Mad LLC use?
Its 2023 site energy-use intensity was 77.1 kBtu/ft² (172.4 kBtu/ft² source) across 71,871 sq ft, including 1,079,443 kWh of electricity and 10,506 therms of natural gas.
What are 148 Mad LLC's carbon emissions?
148 Mad LLC reported 510 tCO₂e of greenhouse-gas emissions (7.1 kgCO₂e/ft²) for 2023.
Where is 148 Mad LLC?
148 Mad LLC is at 148 Madison Avenue, in New York City, New York 10016. Its coordinates are 40.74634, -73.98401 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 148 Mad LLC and when was it built?
148 Mad LLC has 71,871 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 148 Mad LLC 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, “148 Mad LLC, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/148-mad-llc-b8c5c95c (data as of October 2, 2026).