Namdar: 830 3rd Ave
Office in New York City, NY · 830 3rd Ave · 10022
At a glance
Namdar: 830 3rd Ave is a 161,183-square-foot office building in New York City, New York, built in 1958. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 91 out of 100 (grade A), a site energy-use intensity of 37.5 kBtu/ft² and 593 tCO₂e of greenhouse-gas emissions. That score is higher than 77% of the 2,519 scored office buildings in New York City.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 91 (band A) |
| Site EUI | 37.5 kBtu/ft² |
| Source EUI | 85.7 kBtu/ft² |
| GHG emissions | 593 tCO₂e |
| GHG intensity | 3.7 kgCO₂e/ft² |
| Electricity | 1,225,732 kWh |
| Natural gas | 8,983 therms |
| Water use | 930 kgal |
| Gross floor area | 161,183 sq ft |
| Source record | nyc:33639056:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 91 | +3 | 37.5 kBtu/ft² | 593 tCO₂e |
| 2023 | 88 | 40.4 kBtu/ft² | 586 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
- 830 3rd Ave
- City
- New York City
- State
- New York
- ZIP
- 10022
- Coordinates
- 40.75622, -73.97050
Within ~1 km
Nearby benchmarked buildings
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See also: most efficient in New York City · biggest emitters
How does Namdar: 830 3rd Ave 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. Namdar: 830 3rd Ave's ENERGY STAR score of 91 compares with an average of 72 across the 2,519 that report a score; it scores higher than 77% of them and lower than 21%. Its site EUI of 37.5 kBtu/ft² is about 42% below the average of 64.5 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 3.7 kgCO₂e/ft² is about 37% below the group average of 5.8 kgCO₂e/ft².
At 161,183 sq ft, it is about 22% below the average floor area of 205,440 sq ft for those buildings. It was built in 1958, 18 years later 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 Namdar: 830 3rd Ave's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for Namdar: 830 3rd Ave, covering report years 2023–2024. Its ENERGY STAR score went from 88 in 2023 to 91 in 2024 (+3 points). Site EUI moved from 40.4 kBtu/ft² (2023) to 37.5 kBtu/ft² (2024), a 7% decrease. Reported emissions went from 586 tCO₂e to 593 tCO₂e over the same span (up 1%).
What does an ENERGY STAR score of 91 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 91 means the building performs better than about 91% of its national peers. BuildingCensus bands the score into report-card grades; 91 falls in band A — high performer (85–100). 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. Namdar: 830 3rd Ave's 37.5 kBtu/ft² across 161,183 sq ft works out to about 6 billion Btu (1,771 MWh-equivalent) in 2024. Its source EUI of 85.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,225,732 kWh of electricity, 8,983 therms of natural gas and 930 thousand gallons of water for the year.
Which law requires Namdar: 830 3rd Ave to report its energy use?
Namdar: 830 3rd Ave 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:33639056:2024). 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 office buildings in New York City
- 341-353 39th Street (Parent Property)· 160,995 sq ft · EUI 19.7 kBtu/ft²
- 440 Park Avenue South· 160,709 sq ft
- 303 Fifth Avenue Inc - 303 Fifth Ave· 160,454 sq ft · score 87 (A)
- Ashkenazy: 635 Madison Ave· 160,373 sq ft · score 71 (B)
- URA Group - 569 Broadway· 160,000 sq ft · score 38 (D)
- 801 2nd Avenue· 159,968 sq ft · score 89 (A)
- 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 Namdar: 830 3rd Ave's energy grade?
Namdar: 830 3rd Ave scores 91 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Namdar: 830 3rd Ave use?
Its 2024 site energy-use intensity was 37.5 kBtu/ft² (85.7 kBtu/ft² source) across 161,183 sq ft, including 1,225,732 kWh of electricity and 8,983 therms of natural gas.
What are Namdar: 830 3rd Ave's carbon emissions?
Namdar: 830 3rd Ave reported 593 tCO₂e of greenhouse-gas emissions (3.7 kgCO₂e/ft²) for 2024.
Where is Namdar: 830 3rd Ave?
Namdar: 830 3rd Ave is in New York City, New York 10022. Its coordinates are 40.75622, -73.97050 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Namdar: 830 3rd Ave and when was it built?
Namdar: 830 3rd Ave has 161,183 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1958 as its year built. It is classed as office.
Is Namdar: 830 3rd Ave 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, “Namdar: 830 3rd Ave, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/namdar-830-3rd-ave-cdba1abc (data as of October 2, 2026).