At a glance
Union Stables is a 68,400-square-foot office building at 2200 WESTERN AVE in Seattle, Washington, built in 1909. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 92 out of 100 (grade A), a site energy-use intensity of 52.6 kBtu/ft² and 97 tCO₂e of greenhouse-gas emissions. That score is higher than 76% of the 378 scored office buildings in Seattle.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 92 (band A) |
| Site EUI | 52.6 kBtu/ft² |
| Source EUI | 105.1 kBtu/ft² |
| GHG emissions | 97 tCO₂e |
| GHG intensity | 1.4 kgCO₂e/ft² |
| Electricity | 568,616 kWh |
| Natural gas | 16,360 therms |
| Gross floor area | 68,400 sq ft |
| Source record | seattle:21505:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 92 | +1 | 52.6 kBtu/ft² | 97 tCO₂e |
| 2024 | 91 | ±0 | 55.6 kBtu/ft² | 103 tCO₂e |
| 2023 | 91 | +4 | 56.3 kBtu/ft² | 110 tCO₂e |
| 2022 | 87 | -4 | 64.0 kBtu/ft² | 122 tCO₂e |
| 2021 | 91 | -7 | 55.9 kBtu/ft² | 101 tCO₂e |
| 2020 | 98 | +4 | 29.5 kBtu/ft² | 34 tCO₂e |
| 2019 | 94 | -5 | 37.4 kBtu/ft² | 32 tCO₂e |
| 2018 | 99 | ±0 | 23.5 kBtu/ft² | 12 tCO₂e |
| 2017 | 99 | -1 | 28.8 kBtu/ft² | 14 tCO₂e |
| 2016 | 100 | ±0 | 24.0 kBtu/ft² | 12 tCO₂e |
| 2015 | 100 | 22.7 kBtu/ft² | 13 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
- 2200 WESTERN AVE
- City
- Seattle
- State
- Washington
- ZIP
- 98121
- Coordinates
- 47.61230, -122.34611
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does Union Stables compare with other office buildings in Seattle?
The latest disclosures cover 497 office buildings in Seattle, out of 3,871 buildings citywide. Union Stables's ENERGY STAR score of 92 compares with an average of 76 across the 378 that report a score; it scores higher than 76% of them and lower than 21%. Its site EUI of 52.6 kBtu/ft² is about 17% above the average of 44.8 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 1.4 kgCO₂e/ft² is about twice the group average of 0.7 kgCO₂e/ft².
At 68,400 sq ft, it is about 65% below the average floor area of 196,452 sq ft for those buildings. It was built in 1909, 56 years earlier than the group's average year built (1965). 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 Union Stables's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Union Stables, covering report years 2015–2025. Its ENERGY STAR score went from 100 in 2015 to 92 in 2025 (-8 points); its best year on file was 2015, at 100. Site EUI moved from 22.7 kBtu/ft² (2015) to 52.6 kBtu/ft² (2025), an 132% increase. Reported emissions went from 13 tCO₂e to 97 tCO₂e over the same span (up 661%).
What does an ENERGY STAR score of 92 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 92 means the building performs better than about 92% of its national peers. BuildingCensus bands the score into report-card grades; 92 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 Seattle, 69% 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. Union Stables's 52.6 kBtu/ft² across 68,400 sq ft works out to about 3.6 billion Btu (1,054 MWh-equivalent) in 2025. Its source EUI of 105.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 568,616 kWh of electricity and 16,360 therms of natural gas for the year.
Which law requires Union Stables to report its energy use?
Union Stables 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:21505:2025). 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 office buildings in Seattle
- The Reedo Building· 66,842 sq ft · score 45 (D)
- Harbor Avenue Campus· 66,473 sq ft
- Terry Ave Bldg· 64,596 sq ft · score 96 (A)
- 1201 Building· 64,512 sq ft · score 67 (C)
- SEATTLE METROPOLITAN CREDIT UNION- demolished· 63,990 sq ft · score 80 (B)
- CHROMER BUILDING· 63,540 sq ft · score 88 (A)
- Office buildings in Seattle· 497 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 Union Stables's energy grade?
Union Stables scores 92 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2025 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Union Stables use?
Its 2025 site energy-use intensity was 52.6 kBtu/ft² (105.1 kBtu/ft² source) across 68,400 sq ft, including 568,616 kWh of electricity and 16,360 therms of natural gas.
What are Union Stables's carbon emissions?
Union Stables reported 97 tCO₂e of greenhouse-gas emissions (1.4 kgCO₂e/ft²) for 2025.
Where is Union Stables?
Union Stables is at 2200 WESTERN AVE, in Seattle, Washington 98121. Its coordinates are 47.61230, -122.34611 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Union Stables and when was it built?
Union Stables has 68,400 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1909 as its year built. It is classed as office.
Is Union Stables 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, “Union Stables, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/union-stables-d0bea60c (data as of October 2, 2026).