2 Dag Hammarskjold Condo
Office in New York City, NY · 866 2nd Avenue · 10017
At a glance
2 Dag Hammarskjold Condo is a 90,605-square-foot office building at 866 2nd Avenue in New York City, New York, built in 1970. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 63 out of 100 (grade C), a site energy-use intensity of 98.7 kBtu/ft² and 769 tCO₂e of greenhouse-gas emissions. That score is higher than 27% 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 | 63 (band C) |
| Site EUI | 98.7 kBtu/ft² |
| Source EUI | 182.0 kBtu/ft² |
| GHG emissions | 769 tCO₂e |
| GHG intensity | 8.5 kgCO₂e/ft² |
| Electricity | 1,051,453 kWh |
| Water use | 2,214 kgal |
| Gross floor area | 90,605 sq ft |
| Source record | nyc:4626438:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 63 | -3 | 98.7 kBtu/ft² | 769 tCO₂e |
| 2023 | 66 | +12 | 93.7 kBtu/ft² | 713 tCO₂e |
| 2022 | 54 | 110.7 kBtu/ft² | 745 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
- 866 2nd Avenue
- City
- New York City
- State
- New York
- ZIP
- 10017
- Coordinates
- 40.75256, -73.97020
Within ~1 km
Nearby benchmarked buildings
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- 277 Park Avenuescore 64
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- 345 Park Ave LPscore 47
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- 277 Park Avenuescore 55
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See also: most efficient in New York City · biggest emitters
How does 2 Dag Hammarskjold Condo 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. 2 Dag Hammarskjold Condo's ENERGY STAR score of 63 compares with an average of 72 across the 2,519 that report a score; it scores higher than 27% of them and lower than 73%. Its site EUI of 98.7 kBtu/ft² is about 53% 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 8.5 kgCO₂e/ft² is about 46% above the group average of 5.8 kgCO₂e/ft².
At 90,605 sq ft, it is about 56% below the average floor area of 205,440 sq ft for those buildings. It was built in 1970, 30 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 2 Dag Hammarskjold Condo's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 2 Dag Hammarskjold Condo, covering report years 2022–2024. Its ENERGY STAR score went from 54 in 2022 to 63 in 2024 (+9 points); its best year on file was 2023, at 66. Site EUI moved from 110.7 kBtu/ft² (2022) to 98.7 kBtu/ft² (2024), a 11% decrease. Reported emissions went from 745 tCO₂e to 769 tCO₂e over the same span (up 3%).
What does an ENERGY STAR score of 63 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 63 means the building performs better than about 63% of its national peers. BuildingCensus bands the score into report-card grades; 63 falls in band C — below median (55–69). It sits 12 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. 2 Dag Hammarskjold Condo's 98.7 kBtu/ft² across 90,605 sq ft works out to about 8.9 billion Btu (2,621 MWh-equivalent) in 2024. Its source EUI of 182.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,051,453 kWh of electricity and 2,214 thousand gallons of water for the year.
Which law requires 2 Dag Hammarskjold Condo to report its energy use?
2 Dag Hammarskjold Condo 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:4626438:2024). 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
- Walter & Samuels - 225 W 39th· 90,500 sq ft · EUI 49.0 kBtu/ft²
- OCME_294_Manhattan Chief Medical Examiner· 90,456 sq ft · score 3 (D)
- ACHS - 5200 Utica/5132 KINGSHIGWY· 90,405 sq ft · score 38 (D)
- 5200 KINGS HWY.· 90,405 sq ft · score 63 (C)
- 850_7th Ave_Texwood· 90,320 sq ft · score 100 (A)
- *Feil - 140 West 57th Street· 90,000 sq ft · score 75 (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 2 Dag Hammarskjold Condo's energy grade?
2 Dag Hammarskjold Condo scores 63 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 2 Dag Hammarskjold Condo use?
Its 2024 site energy-use intensity was 98.7 kBtu/ft² (182.0 kBtu/ft² source) across 90,605 sq ft, including 1,051,453 kWh of electricity.
What are 2 Dag Hammarskjold Condo's carbon emissions?
2 Dag Hammarskjold Condo reported 769 tCO₂e of greenhouse-gas emissions (8.5 kgCO₂e/ft²) for 2024.
Where is 2 Dag Hammarskjold Condo?
2 Dag Hammarskjold Condo is at 866 2nd Avenue, in New York City, New York 10017. Its coordinates are 40.75256, -73.97020 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 2 Dag Hammarskjold Condo and when was it built?
2 Dag Hammarskjold Condo has 90,605 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1970 as its year built. It is classed as office.
Is 2 Dag Hammarskjold Condo 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, “2 Dag Hammarskjold Condo, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/2-dag-hammarskjold-condo-1f97a4dc (data as of October 2, 2026).