Isola Sw Alaska
Multifamily Housing in Seattle, WA · 4400 SW ALASKA ST · 98116
At a glance
Isola Sw Alaska is a 29,317-square-foot multifamily housing building at 4400 SW ALASKA ST in Seattle, Washington, built in 2017. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 27.2 kBtu/ft² and 19 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 27.2 kBtu/ft² |
| Source EUI | 57.8 kBtu/ft² |
| GHG emissions | 19 tCO₂e |
| GHG intensity | 0.7 kgCO₂e/ft² |
| Electricity | 138,344 kWh |
| Natural gas | 2,989 therms |
| Gross floor area | 29,317 sq ft |
| Source record | seattle:50187:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 27.2 kBtu/ft² | 19 tCO₂e | |
| 2024 | — | 27.4 kBtu/ft² | 18 tCO₂e | |
| 2023 | — | 27.5 kBtu/ft² | 17 tCO₂e | |
| 2022 | — | 27.8 kBtu/ft² | 17 tCO₂e | |
| 2021 | — | 27.1 kBtu/ft² | 17 tCO₂e | |
| 2020 | — | 27.3 kBtu/ft² | 16 tCO₂e | |
| 2019 | — | 27.1 kBtu/ft² | 16 tCO₂e | |
| 2018 | — | 34.5 kBtu/ft² | 29 tCO₂e | |
| 2017 | — | 19.4 kBtu/ft² | 3 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
- 4400 SW ALASKA ST
- City
- Seattle
- State
- Washington
- ZIP
- 98116
- Coordinates
- 47.56127, -122.38861
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does Isola Sw Alaska compare with other multifamily housing buildings in Seattle?
The latest disclosures cover 1,971 multifamily housing buildings in Seattle, out of 3,871 buildings citywide. Its site EUI of 27.2 kBtu/ft² is about 22% below the average of 34.9 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.7 kgCO₂e/ft² is roughly in line with the group average of 0.7 kgCO₂e/ft².
At 29,317 sq ft, it is about 66% below the average floor area of 86,468 sq ft for those buildings. It was built in 2017, 34 years later than the group's average year built (1983). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².
How has Isola Sw Alaska's energy performance changed over time?
BuildingCensus holds 9 Seattle disclosures for Isola Sw Alaska, covering report years 2017–2025. Site EUI moved from 19.4 kBtu/ft² (2017) to 27.2 kBtu/ft² (2025), an 40% increase. Reported emissions went from 3 tCO₂e to 19 tCO₂e over the same span (up 479%).
What does a site EUI of 27.2 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. Isola Sw Alaska's 27.2 kBtu/ft² across 29,317 sq ft works out to about 0.8 billion Btu (234 MWh-equivalent) in 2025. Its source EUI of 57.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 138,344 kWh of electricity and 2,989 therms of natural gas for the year.
Which law requires Isola Sw Alaska to report its energy use?
Isola Sw Alaska 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:50187:2025). 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 multifamily housing buildings in Seattle
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- Multifamily Housing buildings in Seattle· 1,971 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 Isola Sw Alaska's energy grade?
Isola Sw Alaska did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 27.2 kBtu/ft².
How much energy does Isola Sw Alaska use?
Its 2025 site energy-use intensity was 27.2 kBtu/ft² (57.8 kBtu/ft² source) across 29,317 sq ft, including 138,344 kWh of electricity and 2,989 therms of natural gas.
What are Isola Sw Alaska's carbon emissions?
Isola Sw Alaska reported 19 tCO₂e of greenhouse-gas emissions (0.7 kgCO₂e/ft²) for 2025.
Where is Isola Sw Alaska?
Isola Sw Alaska is at 4400 SW ALASKA ST, in Seattle, Washington 98116. Its coordinates are 47.56127, -122.38861 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Isola Sw Alaska and when was it built?
Isola Sw Alaska has 29,317 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 2017 as its year built. It is classed as multifamily housing.
Is Isola Sw Alaska 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, “Isola Sw Alaska, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/isola-sw-alaska-6522562f (data as of October 2, 2026).