Ace Hotel (Union Gospel Mission Building)
Other - Lodging/Residential in Seattle, WA · 318 2ND AV ET S · 98104
At a glance
Ace Hotel (Union Gospel Mission Building) is a 29,820-square-foot other - lodging/residential building at 318 2ND AV ET S in Seattle, Washington, built in 1904. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 35.7 kBtu/ft² and 13 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 35.7 kBtu/ft² |
| Source EUI | 91.6 kBtu/ft² |
| GHG emissions | 13 tCO₂e |
| GHG intensity | 0.4 kgCO₂e/ft² |
| Electricity | 270,313 kWh |
| Natural gas | 1,414 therms |
| Gross floor area | 29,820 sq ft |
| Source record | seattle:26711:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 35.7 kBtu/ft² | 13 tCO₂e | |
| 2024 | — | 35.3 kBtu/ft² | 11 tCO₂e | |
| 2023 | — | 39.3 kBtu/ft² | 16 tCO₂e | |
| 2022 | — | — | 5 tCO₂e | |
| 2021 | — | 36.5 kBtu/ft² | 16 tCO₂e | |
| 2020 | — | 38.1 kBtu/ft² | 18 tCO₂e | |
| 2019 | — | 55.0 kBtu/ft² | 41 tCO₂e | |
| 2018 | — | 52.5 kBtu/ft² | 36 tCO₂e | |
| 2017 | — | 51.3 kBtu/ft² | 34 tCO₂e | |
| 2016 | — | 53.7 kBtu/ft² | 34 tCO₂e | |
| 2015 | — | 54.4 kBtu/ft² | 37 tCO₂e |
Compliance context
Seattle Energy Benchmarking Ordinance (SMC 22.920)
Seattle's Building Emissions Performance Standard (adopted 2023) applies to buildings over 20,000 sq ft: benchmarking verification is due 2027–2030 and initial emissions targets 2031–2035, reaching net zero by 2041–2050, with fines for non-compliance.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 318 2ND AV ET S
- City
- Seattle
- State
- Washington
- ZIP
- 98104
- Coordinates
- 47.60055, -122.33057
Within ~1 km
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- Seattle Municipal Towerscore 86
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See also: most efficient in Seattle · biggest emitters
How does Ace Hotel (Union Gospel Mission Building) compare with other other - lodging/residential buildings in Seattle?
The latest disclosures cover 7 other - lodging/residential buildings in Seattle, out of 3,871 buildings citywide. Its site EUI of 35.7 kBtu/ft² is about 20% below the average of 44.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.4 kgCO₂e/ft² is about 65% below the group average of 1.2 kgCO₂e/ft².
At 29,820 sq ft, it is about 24% below the average floor area of 39,435 sq ft for those buildings. It was built in 1904, 44 years earlier than the group's average year built (1948). Across all 24 jurisdictions BuildingCensus covers, the 327 other - lodging/residential buildings average an ENERGY STAR score of 70 and a site EUI of 75.4 kBtu/ft².
How has Ace Hotel (Union Gospel Mission Building)'s energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Ace Hotel (Union Gospel Mission Building), covering report years 2015–2025. Site EUI moved from 54.4 kBtu/ft² (2015) to 35.7 kBtu/ft² (2025), a 34% decrease. Reported emissions went from 37 tCO₂e to 13 tCO₂e over the same span (down 66%).
What does a site EUI of 35.7 kBtu/ft² mean?
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. Ace Hotel (Union Gospel Mission Building)'s 35.7 kBtu/ft² across 29,820 sq ft works out to about 1.1 billion Btu (312 MWh-equivalent) in 2025. Its source EUI of 91.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 270,313 kWh of electricity and 1,414 therms of natural gas for the year.
Which law requires Ace Hotel (Union Gospel Mission Building) to report its energy use?
Ace Hotel (Union Gospel Mission Building) reports under the Seattle Energy Benchmarking Ordinance (SMC 22.920), the legal basis of Seattle's Building Energy Benchmarking program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2025 disclosure (source record seattle:26711:2025). Seattle's Building Emissions Performance Standard (adopted 2023) applies to buildings over 20,000 sq ft: benchmarking verification is due 2027–2030 and initial emissions targets 2031–2035, reaching net zero by 2041–2050, with fines for non-compliance.
More other - lodging/residential buildings in Seattle
- Teen Challenge - Union Gospel Mission· 25,200 sq ft · EUI 55.4 kBtu/ft²
- Alpha Phi Sorority· 22,232 sq ft · EUI 68.4 kBtu/ft²
- Kappa Alpha Theta Sorority· 20,686 sq ft · EUI 60.9 kBtu/ft²
- All Seattle benchmarked buildings· Seattle Energy Benchmarking Ordinance (SMC 22.920)
- Most efficient large buildings in Seattle
- Least efficient large buildings in Seattle
- Biggest emitters in Seattle
Frequently asked questions
What is Ace Hotel (Union Gospel Mission Building)'s energy grade?
Ace Hotel (Union Gospel Mission Building) did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 35.7 kBtu/ft².
How much energy does Ace Hotel (Union Gospel Mission Building) use?
Its 2025 site energy-use intensity was 35.7 kBtu/ft² (91.6 kBtu/ft² source) across 29,820 sq ft, including 270,313 kWh of electricity and 1,414 therms of natural gas.
What are Ace Hotel (Union Gospel Mission Building)'s carbon emissions?
Ace Hotel (Union Gospel Mission Building) reported 13 tCO₂e of greenhouse-gas emissions (0.4 kgCO₂e/ft²) for 2025.
Where is Ace Hotel (Union Gospel Mission Building)?
Ace Hotel (Union Gospel Mission Building) is at 318 2ND AV ET S, in Seattle, Washington 98104. Its coordinates are 47.60055, -122.33057 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Ace Hotel (Union Gospel Mission Building) and when was it built?
Ace Hotel (Union Gospel Mission Building) has 29,820 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1904 as its year built. It is classed as other - lodging/residential.
Is Ace Hotel (Union Gospel Mission Building) covered by the Seattle Energy Benchmarking Ordinance (SMC 22.920)?
Yes — it appears in the 2025 Building Energy Benchmarking disclosure, which lists the buildings reporting under the Seattle Energy Benchmarking Ordinance (SMC 22.920).
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About this data
Source: Building Energy Benchmarking (Seattle Energy Benchmarking Ordinance (SMC 22.920)), as published October 2, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “Ace Hotel (Union Gospel Mission Building), Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/ace-hotel-union-gospel-mission-building-e28f6f2b (data as of October 2, 2026).