Armory Building (Mohai)
Museum in Seattle, WA · 860 TERRY AVE N · 98109
At a glance
Armory Building (Mohai) is a 52,690-square-foot museum building at 860 TERRY AVE N in Seattle, Washington, built in 1900. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 144.7 kBtu/ft² and 246 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 144.7 kBtu/ft² |
| Source EUI | 257.0 kBtu/ft² |
| GHG emissions | 246 tCO₂e |
| GHG intensity | 4.7 kgCO₂e/ft² |
| Electricity | 927,300 kWh |
| Natural gas | 44,598 therms |
| Gross floor area | 52,690 sq ft |
| Source record | seattle:233:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 144.7 kBtu/ft² | 246 tCO₂e | |
| 2024 | — | 146.6 kBtu/ft² | 257 tCO₂e | |
| 2023 | — | 145.8 kBtu/ft² | 255 tCO₂e | |
| 2022 | — | 154.8 kBtu/ft² | 275 tCO₂e | |
| 2021 | — | 145.4 kBtu/ft² | 261 tCO₂e | |
| 2020 | — | 139.5 kBtu/ft² | 240 tCO₂e | |
| 2019 | — | 176.9 kBtu/ft² | 222 tCO₂e | |
| 2018 | — | 172.4 kBtu/ft² | 219 tCO₂e | |
| 2017 | — | 181.6 kBtu/ft² | 234 tCO₂e | |
| 2016 | — | 175.6 kBtu/ft² | 221 tCO₂e | |
| 2015 | — | 170.7 kBtu/ft² | 217 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.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 860 TERRY AVE N
- City
- Seattle
- State
- Washington
- ZIP
- 98109
- Coordinates
- 47.62759, -122.33661
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does Armory Building (Mohai) compare with other museum buildings in Seattle?
The latest disclosures cover 10 museum buildings in Seattle, out of 3,871 buildings citywide. Its site EUI of 144.7 kBtu/ft² is about 28% above the average of 113.3 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 4.7 kgCO₂e/ft² is about 30% above the group average of 3.6 kgCO₂e/ft².
At 52,690 sq ft, it is about half of the average floor area of 105,838 sq ft for those buildings. It was built in 1900, 71 years earlier than the group's average year built (1971).
How has Armory Building (Mohai)'s energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Armory Building (Mohai), covering report years 2015–2025. Site EUI moved from 170.7 kBtu/ft² (2015) to 144.7 kBtu/ft² (2025), a 15% decrease. Reported emissions went from 217 tCO₂e to 246 tCO₂e over the same span (up 14%).
What does a site EUI of 144.7 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. Armory Building (Mohai)'s 144.7 kBtu/ft² across 52,690 sq ft works out to about 7.6 billion Btu (2,234 MWh-equivalent) in 2025. Its source EUI of 257.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 927,300 kWh of electricity and 44,598 therms of natural gas for the year.
Which law requires Armory Building (Mohai) to report its energy use?
Armory Building (Mohai) 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:233:2025). 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 museum buildings in Seattle
- Frye Art Museum· 47,699 sq ft · EUI 223.2 kBtu/ft²
- Chihuly Garden & Glass· 30,533 sq ft · EUI 201.1 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 Armory Building (Mohai)'s energy grade?
Armory Building (Mohai) did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 144.7 kBtu/ft².
How much energy does Armory Building (Mohai) use?
Its 2025 site energy-use intensity was 144.7 kBtu/ft² (257.0 kBtu/ft² source) across 52,690 sq ft, including 927,300 kWh of electricity and 44,598 therms of natural gas.
What are Armory Building (Mohai)'s carbon emissions?
Armory Building (Mohai) reported 246 tCO₂e of greenhouse-gas emissions (4.7 kgCO₂e/ft²) for 2025.
Where is Armory Building (Mohai)?
Armory Building (Mohai) is at 860 TERRY AVE N, in Seattle, Washington 98109. Its coordinates are 47.62759, -122.33661 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Armory Building (Mohai) and when was it built?
Armory Building (Mohai) has 52,690 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1900 as its year built. It is classed as museum.
Is Armory Building (Mohai) 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 Building (Mohai), Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/armory-building-mohai-4a02a8be (data as of October 2, 2026).