Westbridge Building - Seattle Parks Dept
Mixed Use Property in Seattle, WA · 4201 WEST MARGINAL WAY SW · 98106
At a glance
Westbridge Building - Seattle Parks Dept is a 113,780-square-foot mixed use property building at 4201 WEST MARGINAL WAY SW in Seattle, Washington, built in 1955. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 36.9 kBtu/ft² and 129 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 36.9 kBtu/ft² |
| Source EUI | 67.2 kBtu/ft² |
| GHG emissions | 129 tCO₂e |
| GHG intensity | 1.1 kgCO₂e/ft² |
| Electricity | 529,632 kWh |
| Natural gas | 23,024 therms |
| Gross floor area | 113,780 sq ft |
| Source record | seattle:504:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 36.9 kBtu/ft² | 129 tCO₂e | |
| 2024 | — | 32.9 kBtu/ft² | 116 tCO₂e | |
| 2023 | — | 38.7 kBtu/ft² | 151 tCO₂e | |
| 2022 | — | 37.9 kBtu/ft² | 150 tCO₂e | |
| 2021 | — | 36.5 kBtu/ft² | 145 tCO₂e | |
| 2020 | — | 33.2 kBtu/ft² | 129 tCO₂e | |
| 2019 | — | 36.1 kBtu/ft² | 137 tCO₂e | |
| 2018 | — | 33.0 kBtu/ft² | 126 tCO₂e | |
| 2017 | — | 42.7 kBtu/ft² | 182 tCO₂e | |
| 2016 | — | 31.4 kBtu/ft² | 120 tCO₂e | |
| 2015 | — | 31.5 kBtu/ft² | 120 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
- 4201 WEST MARGINAL WAY SW
- City
- Seattle
- State
- Washington
- ZIP
- 98106
- Coordinates
- 47.56548, -122.35378
Within ~1 km
Nearby benchmarked buildings
- Puget Sound -Terminal 7 Bscore —
Non-Refrigerated Warehouse · 170,632 sq ft
Non-Refrigerated Warehouse · 152,365 sq ft
Office · 139,557 sq ft
K-12 School · 75,364 sq ft
- Fergusonscore 45
Distribution Center · 72,719 sq ft
- Harbor Marina Bldgs E & Fscore 85
Office · 60,657 sq ft
See also: most efficient in Seattle · biggest emitters
How does Westbridge Building - Seattle Parks Dept compare with other mixed use property buildings in Seattle?
The latest disclosures cover 157 mixed use property buildings in Seattle, out of 3,871 buildings citywide. Its site EUI of 36.9 kBtu/ft² is about half of the average of 68.7 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 1.1 kgCO₂e/ft² is about 18% below the group average of 1.4 kgCO₂e/ft².
At 113,780 sq ft, it is about 31% below the average floor area of 165,352 sq ft for those buildings. It was built in 1955, 13 years earlier than the group's average year built (1968). Across all 24 jurisdictions BuildingCensus covers, the 1,212 mixed use property buildings average an ENERGY STAR score of 69 and a site EUI of 79.8 kBtu/ft².
How has Westbridge Building - Seattle Parks Dept's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Westbridge Building - Seattle Parks Dept, covering report years 2015–2025. Site EUI moved from 31.5 kBtu/ft² (2015) to 36.9 kBtu/ft² (2025), an 17% increase. Reported emissions went from 120 tCO₂e to 129 tCO₂e over the same span (up 7%).
What does a site EUI of 36.9 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. Westbridge Building - Seattle Parks Dept's 36.9 kBtu/ft² across 113,780 sq ft works out to about 4.2 billion Btu (1,230 MWh-equivalent) in 2025. Its source EUI of 67.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 529,632 kWh of electricity and 23,024 therms of natural gas for the year.
Which law requires Westbridge Building - Seattle Parks Dept to report its energy use?
Westbridge Building - Seattle Parks Dept 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:504:2025). 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 mixed use property buildings in Seattle
- Holgate Center· 112,896 sq ft · score 60 (C)
- Westwood Village - Bldg B· 112,467 sq ft · EUI 71.3 kBtu/ft²
- 3005 1st Ave Building· 109,347 sq ft · score 1 (D)
- Brookdale West Seattle· 106,976 sq ft · score 92 (A)
- 1441 Lake Union Center· 103,697 sq ft · EUI 234.3 kBtu/ft²
- Third And Battery Building· 95,576 sq ft · EUI 27.7 kBtu/ft²
- Mixed Use Property buildings in Seattle· 157 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 Westbridge Building - Seattle Parks Dept's energy grade?
Westbridge Building - Seattle Parks Dept did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 36.9 kBtu/ft².
How much energy does Westbridge Building - Seattle Parks Dept use?
Its 2025 site energy-use intensity was 36.9 kBtu/ft² (67.2 kBtu/ft² source) across 113,780 sq ft, including 529,632 kWh of electricity and 23,024 therms of natural gas.
What are Westbridge Building - Seattle Parks Dept's carbon emissions?
Westbridge Building - Seattle Parks Dept reported 129 tCO₂e of greenhouse-gas emissions (1.1 kgCO₂e/ft²) for 2025.
Where is Westbridge Building - Seattle Parks Dept?
Westbridge Building - Seattle Parks Dept is at 4201 WEST MARGINAL WAY SW, in Seattle, Washington 98106. Its coordinates are 47.56548, -122.35378 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Westbridge Building - Seattle Parks Dept and when was it built?
Westbridge Building - Seattle Parks Dept has 113,780 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1955 as its year built. It is classed as mixed use property.
Is Westbridge Building - Seattle Parks Dept 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, “Westbridge Building - Seattle Parks Dept, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/westbridge-building-seattle-parks-dept-7d1a176a (data as of October 2, 2026).