34 Marconi Street
Medical Office in New York City, NY · 10461
At a glance
34 Marconi Street is a 28,270-square-foot medical office in New York City, New York, built in 1952. In its 2022 New York City benchmarking disclosure it reported an ENERGY STAR score of 71 out of 100 (grade B), a site energy-use intensity of 67.4 kBtu/ft² and 131 tCO₂e of greenhouse-gas emissions. That score is higher than 44% of the 147 scored medical office buildings in New York City.
Local Law 84 (LL84) · reporting year 2022
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 71 (band B) |
| Site EUI | 67.4 kBtu/ft² |
| Source EUI | 129.4 kBtu/ft² |
| GHG emissions | 131 tCO₂e |
| GHG intensity | 4.6 kgCO₂e/ft² |
| Electricity | 277,774 kWh |
| Gross floor area | 28,270 sq ft |
| Source record | nyc:6815923:2022 |
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
- 34 Marconi Street
- City
- New York City
- State
- New York
- ZIP
- 10461
- Coordinates
- 40.84775, -73.84235
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 34 Marconi Street compare with other medical office buildings in New York City?
The latest disclosures cover 188 medical office buildings in New York City, out of 48,310 buildings citywide. 34 Marconi Street's ENERGY STAR score of 71 compares with an average of 65 across the 147 that report a score; it scores higher than 44% of them and lower than 55%. Its site EUI of 67.4 kBtu/ft² is about 31% below the average of 97.6 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 4.6 kgCO₂e/ft² is about half of the group average of 8.8 kgCO₂e/ft².
At 28,270 sq ft, it is about 62% below the average floor area of 75,019 sq ft for those buildings. It was built in 1952, 13 years earlier than the group's average year built (1965). Across all 24 jurisdictions BuildingCensus covers, the 1,266 medical office buildings average an ENERGY STAR score of 64 and a site EUI of 92.2 kBtu/ft².
What does an ENERGY STAR score of 71 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 71 means the building performs better than about 71% of its national peers. BuildingCensus bands the score into report-card grades; 71 falls in band B — above median (70–84). It sits 4 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. 34 Marconi Street's 67.4 kBtu/ft² across 28,270 sq ft works out to about 1.9 billion Btu (558 MWh-equivalent) in 2022. Its source EUI of 129.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 277,774 kWh of electricity for the year.
Which law requires 34 Marconi Street to report its energy use?
34 Marconi 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 2022 disclosure (source record nyc:6815923:2022). 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 medical office buildings in New York City
- 438 WEST 51 STREET· 27,909 sq ft · score 46 (D)
- Emblem - Flatbush Center· 27,612 sq ft · score 91 (A)
- Canal Holdings LLC· 27,109 sq ft · score 12 (D)
- 1733 Eastchester Road· 27,100 sq ft
- 951 BROOK AVENUE· 27,088 sq ft · score 51 (D)
- 170 East 210 Street· 27,010 sq ft · score 100 (A)
- Medical Office buildings in New York City· 188 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 34 Marconi Street's energy grade?
34 Marconi Street scores 71 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2022 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 34 Marconi Street use?
Its 2022 site energy-use intensity was 67.4 kBtu/ft² (129.4 kBtu/ft² source) across 28,270 sq ft, including 277,774 kWh of electricity.
What are 34 Marconi Street's carbon emissions?
34 Marconi Street reported 131 tCO₂e of greenhouse-gas emissions (4.6 kgCO₂e/ft²) for 2022.
Where is 34 Marconi Street?
34 Marconi Street is in New York City, New York 10461. Its coordinates are 40.84775, -73.84235 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 34 Marconi Street and when was it built?
34 Marconi Street has 28,270 sq ft of gross floor area, as reported in its 2022 disclosure. The disclosure lists 1952 as its year built. It is classed as medical office.
Is 34 Marconi Street covered by Local Law 84 (LL84)?
Yes — it appears in the 2022 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, “34 Marconi Street, New York City, New York — 2022 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/34-marconi-street-f6bcbde8 (data as of October 2, 2026).