Harbor Island Studios - King County
Other - Utility in Seattle, WA · 3235 16TH AVE SW · 98134
At a glance
Harbor Island Studios - King County is a 79,600-square-foot other - utility building at 3235 16TH AVE SW in Seattle, Washington, built in 1916. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 8.8 kBtu/ft² and 10 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 8.8 kBtu/ft² |
| Source EUI | 24.6 kBtu/ft² |
| GHG emissions | 10 tCO₂e |
| GHG intensity | 0.1 kgCO₂e/ft² |
| Electricity | 543,632 kWh |
| Gross floor area | 79,600 sq ft |
| Source record | seattle:257:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 8.8 kBtu/ft² | 10 tCO₂e | |
| 2024 | — | 8.4 kBtu/ft² | 10 tCO₂e | |
| 2023 | — | 8.6 kBtu/ft² | 11 tCO₂e | |
| 2022 | 55 | -14 | 8.9 kBtu/ft² | 11 tCO₂e |
| 2021 | 69 | +1 | 15.2 kBtu/ft² | 15 tCO₂e |
| 2020 | 68 | -28 | 14.5 kBtu/ft² | 14 tCO₂e |
| 2019 | 96 | +29 | 5.0 kBtu/ft² | 5 tCO₂e |
| 2018 | 67 | +8 | 15.5 kBtu/ft² | 7 tCO₂e |
| 2017 | 59 | +25 | 23.1 kBtu/ft² | 11 tCO₂e |
| 2016 | 34 | -21 | 30.3 kBtu/ft² | 14 tCO₂e |
| 2015 | 55 | 22.4 kBtu/ft² | 10 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
- 3235 16TH AVE SW
- City
- Seattle
- State
- Washington
- ZIP
- 98134
- Coordinates
- 47.57507, -122.35747
Within ~1 km
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- West Seattle Corporate Centerscore 89
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See also: most efficient in Seattle · biggest emitters
How does Harbor Island Studios - King County compare with other buildings in Seattle?
The latest disclosures cover 3,871 benchmarked buildings in Seattle. Its site EUI of 8.8 kBtu/ft² is about 82% below the average of 47.6 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.1 kgCO₂e/ft² is about 95% below the group average of 1.0 kgCO₂e/ft².
At 79,600 sq ft, it is about 29% below the average floor area of 112,467 sq ft for those buildings. It was built in 1916, 59 years earlier 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 Harbor Island Studios - King County's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Harbor Island Studios - King County, covering report years 2015–2025. Its ENERGY STAR score was 55 in both 2015 and 2022. Site EUI moved from 22.4 kBtu/ft² (2015) to 8.8 kBtu/ft² (2025), a 61% decrease. Reported emissions went from 10 tCO₂e to 10 tCO₂e over the same span (up 1%).
What does a site EUI of 8.8 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. Harbor Island Studios - King County's 8.8 kBtu/ft² across 79,600 sq ft works out to about 0.7 billion Btu (205 MWh-equivalent) in 2025. Its source EUI of 24.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 543,632 kWh of electricity for the year.
Which law requires Harbor Island Studios - King County to report its energy use?
Harbor Island Studios - King County 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:257:2025). 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
- City Light - South Service Center Bldg B· 58,640 sq ft · EUI 60.1 kBtu/ft²
- 4500 W Marginal Way Sw· 40,189 sq ft · EUI 62.5 kBtu/ft²
- 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 Harbor Island Studios - King County's energy grade?
Harbor Island Studios - King County did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 8.8 kBtu/ft².
How much energy does Harbor Island Studios - King County use?
Its 2025 site energy-use intensity was 8.8 kBtu/ft² (24.6 kBtu/ft² source) across 79,600 sq ft, including 543,632 kWh of electricity.
What are Harbor Island Studios - King County's carbon emissions?
Harbor Island Studios - King County reported 10 tCO₂e of greenhouse-gas emissions (0.1 kgCO₂e/ft²) for 2025.
Where is Harbor Island Studios - King County?
Harbor Island Studios - King County is at 3235 16TH AVE SW, in Seattle, Washington 98134. Its coordinates are 47.57507, -122.35747 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Harbor Island Studios - King County and when was it built?
Harbor Island Studios - King County has 79,600 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1916 as its year built. It is classed as other - utility.
Is Harbor Island Studios - King County 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, “Harbor Island Studios - King County, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/harbor-island-studios-king-county-9d353019 (data as of October 2, 2026).