At a glance
West Seattle Corporate Center is a 138,106-square-foot office building at 4025 DELRIDGE WAY SW in Seattle, Washington, built in 1991. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 89 out of 100 (grade A), a site energy-use intensity of 38.6 kBtu/ft² and 28 tCO₂e of greenhouse-gas emissions. That score is higher than 67% 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 | 89 (band A) |
| Site EUI | 38.6 kBtu/ft² |
| Source EUI | 108.2 kBtu/ft² |
| GHG emissions | 28 tCO₂e |
| GHG intensity | 0.2 kgCO₂e/ft² |
| Electricity | 1,408,956 kWh |
| Gross floor area | 138,106 sq ft |
| Source record | seattle:652:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 89 | +4 | 38.6 kBtu/ft² | 28 tCO₂e |
| 2024 | 85 | +1 | 42.0 kBtu/ft² | 30 tCO₂e |
| 2023 | 84 | -9 | 43.5 kBtu/ft² | 31 tCO₂e |
| 2022 | 93 | +24 | 33.0 kBtu/ft² | 24 tCO₂e |
| 2021 | 69 | -9 | 51.4 kBtu/ft² | 36 tCO₂e |
| 2020 | 78 | +13 | 53.4 kBtu/ft² | 38 tCO₂e |
| 2019 | 65 | -10 | 64.8 kBtu/ft² | 46 tCO₂e |
| 2018 | 75 | +13 | 58.9 kBtu/ft² | 42 tCO₂e |
| 2017 | 62 | -11 | 66.9 kBtu/ft² | 47 tCO₂e |
| 2016 | 73 | +28 | 68.8 kBtu/ft² | 49 tCO₂e |
| 2015 | 45 | 66.8 kBtu/ft² | 45 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
- 4025 DELRIDGE WAY SW
- City
- Seattle
- State
- Washington
- ZIP
- 98106
- Coordinates
- 47.56787, -122.36419
Within ~1 km
Nearby benchmarked buildings
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- Puget Sound -Terminal 7 Bscore —
Non-Refrigerated Warehouse · 170,632 sq ft
Non-Refrigerated Warehouse · 152,365 sq ft
- City Views Aptsscore 92
Multifamily Housing · 121,037 sq ft
- West Coast Self-Storagescore —
Self-Storage Facility · 104,022 sq ft
See also: most efficient in Seattle · biggest emitters
How does West Seattle Corporate Center compare with other office buildings in Seattle?
The latest disclosures cover 497 office buildings in Seattle, out of 3,871 buildings citywide. West Seattle Corporate Center's ENERGY STAR score of 89 compares with an average of 76 across the 378 that report a score; it scores higher than 67% of them and lower than 30%. Its site EUI of 38.6 kBtu/ft² is about 14% below the average of 44.8 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.2 kgCO₂e/ft² is about 69% below the group average of 0.7 kgCO₂e/ft².
At 138,106 sq ft, it is about 30% below the average floor area of 196,452 sq ft for those buildings. It was built in 1991, 26 years later 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 West Seattle Corporate Center's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for West Seattle Corporate Center, covering report years 2015–2025. Its ENERGY STAR score went from 45 in 2015 to 89 in 2025 (+44 points); its best year on file was 2022, at 93. Site EUI moved from 66.8 kBtu/ft² (2015) to 38.6 kBtu/ft² (2025), a 42% decrease. Reported emissions went from 45 tCO₂e to 28 tCO₂e over the same span (down 38%).
What does an ENERGY STAR score of 89 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 89 means the building performs better than about 89% of its national peers. BuildingCensus bands the score into report-card grades; 89 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. West Seattle Corporate Center's 38.6 kBtu/ft² across 138,106 sq ft works out to about 5.3 billion Btu (1,562 MWh-equivalent) in 2025. Its source EUI of 108.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,408,956 kWh of electricity for the year.
Which law requires West Seattle Corporate Center to report its energy use?
West Seattle Corporate 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:652:2025). 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
- Vance Building· 137,500 sq ft · score 98 (A)
- Logan Building· 135,918 sq ft · score 85 (A)
- 4311 Roosevelt· 135,051 sq ft · score 76 (B)
- 425 PONTIUS· 134,056 sq ft
- Two Pine· 132,998 sq ft · EUI 38.2 kBtu/ft²
- 4PIKE· 132,326 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 West Seattle Corporate Center's energy grade?
West Seattle Corporate Center scores 89 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 West Seattle Corporate Center use?
Its 2025 site energy-use intensity was 38.6 kBtu/ft² (108.2 kBtu/ft² source) across 138,106 sq ft, including 1,408,956 kWh of electricity.
What are West Seattle Corporate Center's carbon emissions?
West Seattle Corporate Center reported 28 tCO₂e of greenhouse-gas emissions (0.2 kgCO₂e/ft²) for 2025.
Where is West Seattle Corporate Center?
West Seattle Corporate Center is at 4025 DELRIDGE WAY SW, in Seattle, Washington 98106. Its coordinates are 47.56787, -122.36419 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is West Seattle Corporate Center and when was it built?
West Seattle Corporate Center has 138,106 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1991 as its year built. It is classed as office.
Is West Seattle Corporate 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, “West Seattle Corporate Center, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/west-seattle-corporate-center-5be5cb1b (data as of October 2, 2026).