Elliott West Bldg 3 - Cell Therepeutics/Admin. Off
Laboratory in Seattle, WA · 501 ELLIOTT AVE W · 98119
At a glance
Elliott West Bldg 3 - Cell Therepeutics/Admin. Off is a 165,111-square-foot laboratory building at 501 ELLIOTT AVE W in Seattle, Washington, built in 2000. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 62.3 kBtu/ft² and 40 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 62.3 kBtu/ft² |
| Source EUI | 174.5 kBtu/ft² |
| GHG emissions | 40 tCO₂e |
| GHG intensity | 0.4 kgCO₂e/ft² |
| Electricity | 2,011,641 kWh |
| Gross floor area | 165,111 sq ft |
| Source record | seattle:703:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 62.3 kBtu/ft² | 40 tCO₂e | |
| 2024 | — | 71.7 kBtu/ft² | 46 tCO₂e | |
| 2023 | — | 16.0 kBtu/ft² | 10 tCO₂e | |
| 2022 | — | 9.5 kBtu/ft² | 6 tCO₂e | |
| 2021 | — | 18.9 kBtu/ft² | 12 tCO₂e | |
| 2020 | — | 22.2 kBtu/ft² | 14 tCO₂e | |
| 2019 | 36 | +35 | 98.4 kBtu/ft² | 63 tCO₂e |
| 2018 | 1 | ±0 | 254.0 kBtu/ft² | 162 tCO₂e |
| 2017 | 1 | ±0 | 261.8 kBtu/ft² | 167 tCO₂e |
| 2016 | 1 | ±0 | 231.4 kBtu/ft² | 148 tCO₂e |
| 2015 | 1 | 208.3 kBtu/ft² | 133 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.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 501 ELLIOTT AVE W
- City
- Seattle
- State
- Washington
- ZIP
- 98119
- Coordinates
- 47.62302, -122.36476
Within ~1 km
Nearby benchmarked buildings
- 635 ELLIOTT - SOUTH BUILDINGscore 65
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- Avalon Queen Annescore 98
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- 3131 Elliott Bldgscore 77
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- Elliott Bay Office Parkscore 97
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- 645 Elliott - North Buildingscore —
Mixed Use Property · 242,686 sq ft
See also: most efficient in Seattle · biggest emitters
How does Elliott West Bldg 3 - Cell Therepeutics/Admin. Off compare with other laboratory buildings in Seattle?
The latest disclosures cover 32 laboratory buildings in Seattle, out of 3,871 buildings citywide. Its site EUI of 62.3 kBtu/ft² is about 65% below the average of 178.6 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.4 kgCO₂e/ft² is about 92% below the group average of 4.6 kgCO₂e/ft².
At 165,111 sq ft, it is about 18% below the average floor area of 202,547 sq ft for those buildings. It was built in 2000, 14 years later than the group's average year built (1986). Across all 24 jurisdictions BuildingCensus covers, the 795 laboratory buildings average an ENERGY STAR score of 29 and a site EUI of 231.7 kBtu/ft².
How has Elliott West Bldg 3 - Cell Therepeutics/Admin. Off's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Elliott West Bldg 3 - Cell Therepeutics/Admin. Off, covering report years 2015–2025. Its ENERGY STAR score went from 1 in 2015 to 36 in 2019 (+35 points). Site EUI moved from 208.3 kBtu/ft² (2015) to 62.3 kBtu/ft² (2025), a 70% decrease. Reported emissions went from 133 tCO₂e to 40 tCO₂e over the same span (down 70%).
What does a site EUI of 62.3 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. Elliott West Bldg 3 - Cell Therepeutics/Admin. Off's 62.3 kBtu/ft² across 165,111 sq ft works out to about 10.3 billion Btu (3,015 MWh-equivalent) in 2025. Its source EUI of 174.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,011,641 kWh of electricity for the year.
Which law requires Elliott West Bldg 3 - Cell Therepeutics/Admin. Off to report its energy use?
Elliott West Bldg 3 - Cell Therepeutics/Admin. Off 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:703:2025). 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 laboratory buildings in Seattle
- 1551 Eastlake Bldg.· 158,600 sq ft · EUI 148.4 kBtu/ft²
- Uw Benjamin Hall Interdisciplinary R&T· 143,439 sq ft · EUI 143.5 kBtu/ft²
- Eleven 65· 132,347 sq ft · EUI 143.5 kBtu/ft²
- 1208 Eastlake Ave E (Dendreon)· 128,408 sq ft · EUI 342.2 kBtu/ft²
- Brotman Building D: UW Medicine Research· 102,235 sq ft · EUI 248.4 kBtu/ft²
- Airport Way Ctr - Bldg A· 99,122 sq ft · EUI 124.2 kBtu/ft²
- Laboratory buildings in Seattle· 32 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 Elliott West Bldg 3 - Cell Therepeutics/Admin. Off's energy grade?
Elliott West Bldg 3 - Cell Therepeutics/Admin. Off did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 62.3 kBtu/ft².
How much energy does Elliott West Bldg 3 - Cell Therepeutics/Admin. Off use?
Its 2025 site energy-use intensity was 62.3 kBtu/ft² (174.5 kBtu/ft² source) across 165,111 sq ft, including 2,011,641 kWh of electricity.
What are Elliott West Bldg 3 - Cell Therepeutics/Admin. Off's carbon emissions?
Elliott West Bldg 3 - Cell Therepeutics/Admin. Off reported 40 tCO₂e of greenhouse-gas emissions (0.4 kgCO₂e/ft²) for 2025.
Where is Elliott West Bldg 3 - Cell Therepeutics/Admin. Off?
Elliott West Bldg 3 - Cell Therepeutics/Admin. Off is at 501 ELLIOTT AVE W, in Seattle, Washington 98119. Its coordinates are 47.62302, -122.36476 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Elliott West Bldg 3 - Cell Therepeutics/Admin. Off and when was it built?
Elliott West Bldg 3 - Cell Therepeutics/Admin. Off has 165,111 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 2000 as its year built. It is classed as laboratory.
Is Elliott West Bldg 3 - Cell Therepeutics/Admin. Off 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, “Elliott West Bldg 3 - Cell Therepeutics/Admin. Off, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/elliott-west-bldg-3-cell-therepeutics-admin-off-dcc49880 (data as of October 2, 2026).