4500 W Marginal Way Sw
Other - Utility in Seattle, WA · 4500 WEST MARGINAL WAY SW · 98106
At a glance
4500 W Marginal Way Sw is a 40,189-square-foot other - utility building at 4500 WEST MARGINAL WAY SW in Seattle, Washington, built in 1997. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 62.5 kBtu/ft² and 77 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 62.5 kBtu/ft² |
| Source EUI | 110.1 kBtu/ft² |
| GHG emissions | 77 tCO₂e |
| GHG intensity | 2.1 kgCO₂e/ft² |
| Electricity | 279,285 kWh |
| Natural gas | 13,871 therms |
| Gross floor area | 40,189 sq ft |
| Source record | seattle:23396:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 62.5 kBtu/ft² | 77 tCO₂e | |
| 2024 | — | 72.5 kBtu/ft² | 99 tCO₂e | |
| 2023 | — | 56.0 kBtu/ft² | 70 tCO₂e | |
| 2022 | — | 55.7 kBtu/ft² | 65 tCO₂e | |
| 2021 | — | 51.6 kBtu/ft² | 51 tCO₂e | |
| 2020 | — | 50.9 kBtu/ft² | 49 tCO₂e | |
| 2019 | — | 29.0 kBtu/ft² | 36 tCO₂e | |
| 2018 | — | 20.4 kBtu/ft² | 18 tCO₂e | |
| 2017 | — | 49.6 kBtu/ft² | 55 tCO₂e | |
| 2016 | — | 40.3 kBtu/ft² | 37 tCO₂e | |
| 2015 | — | 54.6 kBtu/ft² | 64 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
- 4500 WEST MARGINAL WAY SW
- City
- Seattle
- State
- Washington
- ZIP
- 98106
- Coordinates
- 47.56319, -122.35067
Within ~1 km
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- Harbor Marina Bldgs E & Fscore 85
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Transportation Terminal/Station · 41,280 sq ft
See also: most efficient in Seattle · biggest emitters
How does 4500 W Marginal Way Sw compare with other buildings in Seattle?
The latest disclosures cover 3,871 benchmarked buildings in Seattle. Its site EUI of 62.5 kBtu/ft² is about 31% above the average of 47.6 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 2.1 kgCO₂e/ft² is about twice the group average of 1.0 kgCO₂e/ft².
At 40,189 sq ft, it is about 64% below the average floor area of 112,467 sq ft for those buildings. It was built in 1997, 22 years later than the group's average year built (1975). Across all 24 jurisdictions BuildingCensus covers, the 61 other - utility buildings average an ENERGY STAR score of 1 and a site EUI of 99.4 kBtu/ft².
How has 4500 W Marginal Way Sw's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for 4500 W Marginal Way Sw, covering report years 2015–2025. Site EUI moved from 54.6 kBtu/ft² (2015) to 62.5 kBtu/ft² (2025), an 14% increase. Reported emissions went from 64 tCO₂e to 77 tCO₂e over the same span (up 21%).
What does a site EUI of 62.5 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. 4500 W Marginal Way Sw's 62.5 kBtu/ft² across 40,189 sq ft works out to about 2.5 billion Btu (736 MWh-equivalent) in 2025. Its source EUI of 110.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 279,285 kWh of electricity and 13,871 therms of natural gas for the year.
Which law requires 4500 W Marginal Way Sw to report its energy use?
4500 W Marginal Way Sw 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:23396:2025). 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 - utility buildings in Seattle
Frequently asked questions
What is 4500 W Marginal Way Sw's energy grade?
4500 W Marginal Way Sw did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 62.5 kBtu/ft².
How much energy does 4500 W Marginal Way Sw use?
Its 2025 site energy-use intensity was 62.5 kBtu/ft² (110.1 kBtu/ft² source) across 40,189 sq ft, including 279,285 kWh of electricity and 13,871 therms of natural gas.
What are 4500 W Marginal Way Sw's carbon emissions?
4500 W Marginal Way Sw reported 77 tCO₂e of greenhouse-gas emissions (2.1 kgCO₂e/ft²) for 2025.
Where is 4500 W Marginal Way Sw?
4500 W Marginal Way Sw is at 4500 WEST MARGINAL WAY SW, in Seattle, Washington 98106. Its coordinates are 47.56319, -122.35067 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 4500 W Marginal Way Sw and when was it built?
4500 W Marginal Way Sw has 40,189 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1997 as its year built. It is classed as other - utility.
Is 4500 W Marginal Way Sw 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, “4500 W Marginal Way Sw, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/4500-w-marginal-way-sw-fa84ac4a (data as of October 2, 2026).