1 Hanover Sq
Office in New York City, NY · 10004
At a glance
1 Hanover Sq is a 47,018-square-foot office building in New York City, New York, built in 1854. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 53 out of 100 (grade D), a site energy-use intensity of 66.2 kBtu/ft² and 295 tCO₂e of greenhouse-gas emissions. That score is higher than 18% 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 | 53 (band D) |
| Site EUI | 66.2 kBtu/ft² |
| Source EUI | 147.1 kBtu/ft² |
| GHG emissions | 295 tCO₂e |
| GHG intensity | 6.3 kgCO₂e/ft² |
| Electricity | 611,224 kWh |
| Natural gas | 10,274 therms |
| Gross floor area | 47,018 sq ft |
| Source record | nyc:33975023:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 53 | +18 | 66.2 kBtu/ft² | 295 tCO₂e |
| 2023 | 35 | 82.4 kBtu/ft² | 261 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
- 1 Hanover Sq
- City
- New York City
- State
- New York
- ZIP
- 10004
- Coordinates
- 40.70465, -74.00961
Within ~1 km
Nearby benchmarked buildings
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- 225 Liberty Streetscore 81
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- One Liberty Plaza (149 BROADWAY)score 75
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- 28 Libertyscore 59
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- 120 Broadway Holdings, LLCscore 78
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See also: most efficient in New York City · biggest emitters
How does 1 Hanover Sq 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. 1 Hanover Sq's ENERGY STAR score of 53 compares with an average of 72 across the 2,519 that report a score; it scores higher than 18% of them and lower than 81%. Its site EUI of 66.2 kBtu/ft² is roughly in line with the average of 64.5 kBtu/ft². Its emissions intensity of 6.3 kgCO₂e/ft² is roughly in line with the group average of 5.8 kgCO₂e/ft².
At 47,018 sq ft, it is about 77% below the average floor area of 205,440 sq ft for those buildings. It was built in 1854, 86 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 1 Hanover Sq's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for 1 Hanover Sq, covering report years 2023–2024. Its ENERGY STAR score went from 35 in 2023 to 53 in 2024 (+18 points). Site EUI moved from 82.4 kBtu/ft² (2023) to 66.2 kBtu/ft² (2024), a 20% decrease. Reported emissions went from 261 tCO₂e to 295 tCO₂e over the same span (up 13%).
What does an ENERGY STAR score of 53 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 53 means the building performs better than about 53% of its national peers. BuildingCensus bands the score into report-card grades; 53 falls in band D — lowest band (1–54). It sits 22 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. 1 Hanover Sq's 66.2 kBtu/ft² across 47,018 sq ft works out to about 3.1 billion Btu (912 MWh-equivalent) in 2024. Its source EUI of 147.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 611,224 kWh of electricity and 10,274 therms of natural gas for the year.
Which law requires 1 Hanover Sq to report its energy use?
1 Hanover Sq 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:33975023:2024). 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
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- Museum Of Chinese In America - 215 Centre st· 46,700 sq ft · score 90 (A)
- 520-530 West 135th Street· 46,535 sq ft · EUI 26.4 kBtu/ft²
- 37 West 39th Street· 46,500 sq ft · score 73 (B)
- 27-08 40 AVENUE· 46,315 sq ft · score 78 (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 1 Hanover Sq's energy grade?
1 Hanover Sq scores 53 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 1 Hanover Sq use?
Its 2024 site energy-use intensity was 66.2 kBtu/ft² (147.1 kBtu/ft² source) across 47,018 sq ft, including 611,224 kWh of electricity and 10,274 therms of natural gas.
What are 1 Hanover Sq's carbon emissions?
1 Hanover Sq reported 295 tCO₂e of greenhouse-gas emissions (6.3 kgCO₂e/ft²) for 2024.
Where is 1 Hanover Sq?
1 Hanover Sq is in New York City, New York 10004. Its coordinates are 40.70465, -74.00961 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 1 Hanover Sq and when was it built?
1 Hanover Sq has 47,018 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1854 as its year built. It is classed as office.
Is 1 Hanover Sq 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, “1 Hanover Sq, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/1-hanover-sq-689d2d98 (data as of October 2, 2026).