17-19 Union Square West
Office in New York City, NY · 17 UNION SQUARE WEST · 10003
At a glance
17-19 Union Square West is a 97,697-square-foot office building at 17 UNION SQUARE WEST in New York City, New York, built in 1911. 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 51.9 kBtu/ft² and 518 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 | 51.9 kBtu/ft² |
| Source EUI | 116.0 kBtu/ft² |
| GHG emissions | 518 tCO₂e |
| GHG intensity | 5.3 kgCO₂e/ft² |
| Electricity | 1,016,484 kWh |
| Natural gas | 33 therms |
| Gross floor area | 97,697 sq ft |
| Source record | nyc:2630917:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 91 | +3 | 51.9 kBtu/ft² | 518 tCO₂e |
| 2023 | 88 | 52.0 kBtu/ft² | 516 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
- 17 UNION SQUARE WEST
- City
- New York City
- State
- New York
- ZIP
- 10003
- Coordinates
- 40.73599, -73.99115
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 17-19 Union Square West 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. 17-19 Union Square West'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 51.9 kBtu/ft² is about 20% 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 5.3 kgCO₂e/ft² is roughly in line with the group average of 5.8 kgCO₂e/ft².
At 97,697 sq ft, it is about half of the average floor area of 205,440 sq ft for those buildings. It was built in 1911, 29 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 17-19 Union Square West's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for 17-19 Union Square West, covering report years 2023–2024. Its ENERGY STAR score went from 88 in 2023 to 91 in 2024 (+3 points). Site EUI moved from 52.0 kBtu/ft² (2023) to 51.9 kBtu/ft² (2024), a 0% decrease. Reported emissions went from 516 tCO₂e to 518 tCO₂e over the same span (up 0%).
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. 17-19 Union Square West's 51.9 kBtu/ft² across 97,697 sq ft works out to about 5.1 billion Btu (1,486 MWh-equivalent) in 2024. Its source EUI of 116.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,016,484 kWh of electricity and 33 therms of natural gas for the year.
Which law requires 17-19 Union Square West to report its energy use?
17-19 Union Square West 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:2630917:2024). 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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- URA Group - 23-10 43rd Ave· 97,650 sq ft · score 100 (A)
- DSNY_3879_Administrative Offices· 97,596 sq ft · score 74 (B)
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- 610 Broadway· 97,500 sq ft · score 43 (D)
- 20 VESEY STREET· 97,491 sq ft · score 88 (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 17-19 Union Square West's energy grade?
17-19 Union Square West 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 17-19 Union Square West use?
Its 2024 site energy-use intensity was 51.9 kBtu/ft² (116.0 kBtu/ft² source) across 97,697 sq ft, including 1,016,484 kWh of electricity and 33 therms of natural gas.
What are 17-19 Union Square West's carbon emissions?
17-19 Union Square West reported 518 tCO₂e of greenhouse-gas emissions (5.3 kgCO₂e/ft²) for 2024.
Where is 17-19 Union Square West?
17-19 Union Square West is at 17 UNION SQUARE WEST, in New York City, New York 10003. Its coordinates are 40.73599, -73.99115 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 17-19 Union Square West and when was it built?
17-19 Union Square West has 97,697 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1911 as its year built. It is classed as office.
Is 17-19 Union Square West 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, “17-19 Union Square West, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/17-19-union-square-west-7a398886 (data as of October 2, 2026).