At a glance
Armory - Seattle Center is a 396,085-square-foot other building at 305 HARRISON ST in Seattle, Washington, built in 1938. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 64.4 kBtu/ft² and 318 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 64.4 kBtu/ft² |
| Source EUI | 104.9 kBtu/ft² |
| GHG emissions | 318 tCO₂e |
| GHG intensity | 1.1 kgCO₂e/ft² |
| Electricity | 1,868,817 kWh |
| Natural gas | 33,719 therms |
| Gross floor area | 396,085 sq ft |
| Source record | seattle:106:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 64.4 kBtu/ft² | 318 tCO₂e | |
| 2024 | — | 34.9 kBtu/ft² | 293 tCO₂e | |
| 2023 | — | 49.1 kBtu/ft² | 673 tCO₂e | |
| 2022 | — | 26.7 kBtu/ft² | 147 tCO₂e | |
| 2021 | — | 22.8 kBtu/ft² | 183 tCO₂e | |
| 2020 | — | 29.1 kBtu/ft² | 448 tCO₂e | |
| 2019 | — | 49.5 kBtu/ft² | 624 tCO₂e | |
| 2018 | — | 75.9 kBtu/ft² | 851 tCO₂e | |
| 2017 | — | 104.8 kBtu/ft² | 1,412 tCO₂e | |
| 2016 | — | 75.2 kBtu/ft² | 833 tCO₂e | |
| 2015 | — | 97.6 kBtu/ft² | 933 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
- 305 HARRISON ST
- City
- Seattle
- State
- Washington
- ZIP
- 98109
- Coordinates
- 47.62141, -122.35086
Within ~1 km
Nearby benchmarked buildings
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- Climate Pledge Arenascore —
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- Bill & Melinda Gates Foundationscore 73
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- Olympus Aptsscore 97
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Mixed Use Property · 524,610 sq ft
See also: most efficient in Seattle · biggest emitters
How does Armory - Seattle Center compare with other other buildings in Seattle?
The latest disclosures cover 45 other buildings in Seattle, out of 3,871 buildings citywide. Its site EUI of 64.4 kBtu/ft² is roughly in line with the average of 59.4 kBtu/ft². Its emissions intensity of 1.1 kgCO₂e/ft² is roughly in line with the group average of 1.1 kgCO₂e/ft².
At 396,085 sq ft, it is about 611% above the average floor area of 55,708 sq ft for those buildings. It was built in 1938, 14 years earlier than the group's average year built (1952). Across all 24 jurisdictions BuildingCensus covers, the 1,327 other buildings average an ENERGY STAR score of 60 and a site EUI of 63.3 kBtu/ft².
How has Armory - Seattle Center's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Armory - Seattle Center, covering report years 2015–2025. Site EUI moved from 97.6 kBtu/ft² (2015) to 64.4 kBtu/ft² (2025), a 34% decrease. Reported emissions went from 933 tCO₂e to 318 tCO₂e over the same span (down 66%).
What does a site EUI of 64.4 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. Armory - Seattle Center's 64.4 kBtu/ft² across 396,085 sq ft works out to about 25.5 billion Btu (7,476 MWh-equivalent) in 2025. Its source EUI of 104.9 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,868,817 kWh of electricity and 33,719 therms of natural gas for the year.
Which law requires Armory - Seattle Center to report its energy use?
Armory - Seattle Center 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:106:2025). 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 buildings in Seattle
- KING COUNTY YOUTH SERVICES - CAMPUS- DEMOLISHED- INACTIVE· 250,981 sq ft · EUI 59.4 kBtu/ft²
- Nw Work Lofts - Campus· 217,800 sq ft · EUI 41.6 kBtu/ft²
- Seaboard Building Condominium· 111,137 sq ft · EUI 64.0 kBtu/ft²
- Wsecu Plaza- Seattle· 97,512 sq ft · EUI 24.2 kBtu/ft²
- Nordic Cold Storage Company· 83,400 sq ft · EUI 1.2 kBtu/ft²
- Kcts 9· 66,240 sq ft · EUI 43.8 kBtu/ft²
- Other buildings in Seattle· 45 benchmarked
- 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 Armory - Seattle Center's energy grade?
Armory - Seattle Center did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 64.4 kBtu/ft².
How much energy does Armory - Seattle Center use?
Its 2025 site energy-use intensity was 64.4 kBtu/ft² (104.9 kBtu/ft² source) across 396,085 sq ft, including 1,868,817 kWh of electricity and 33,719 therms of natural gas.
What are Armory - Seattle Center's carbon emissions?
Armory - Seattle Center reported 318 tCO₂e of greenhouse-gas emissions (1.1 kgCO₂e/ft²) for 2025.
Where is Armory - Seattle Center?
Armory - Seattle Center is at 305 HARRISON ST, in Seattle, Washington 98109. Its coordinates are 47.62141, -122.35086 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Armory - Seattle Center and when was it built?
Armory - Seattle Center has 396,085 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1938 as its year built. It is classed as other.
Is Armory - Seattle Center 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, “Armory - Seattle Center, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/armory-seattle-center-19dbc570 (data as of October 2, 2026).