At a glance
West 8th is a 758,043-square-foot office building at 2001 8TH AVE in Seattle, Washington, built in 2009. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 22.9 kBtu/ft² and 71 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 22.9 kBtu/ft² |
| Source EUI | 64.2 kBtu/ft² |
| GHG emissions | 71 tCO₂e |
| GHG intensity | 0.1 kgCO₂e/ft² |
| Electricity | 3,597,922 kWh |
| Natural gas | 51 therms |
| Gross floor area | 758,043 sq ft |
| Source record | seattle:334:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 22.9 kBtu/ft² | 71 tCO₂e | |
| 2024 | — | 22.5 kBtu/ft² | 70 tCO₂e | |
| 2023 | 97 | +3 | 25.3 kBtu/ft² | 79 tCO₂e |
| 2022 | 94 | +2 | 35.8 kBtu/ft² | 110 tCO₂e |
| 2021 | 92 | -2 | 34.3 kBtu/ft² | 105 tCO₂e |
| 2020 | 94 | -1 | 33.1 kBtu/ft² | 112 tCO₂e |
| 2019 | 95 | ±0 | 37.6 kBtu/ft² | 127 tCO₂e |
| 2018 | 95 | +2 | 37.9 kBtu/ft² | 131 tCO₂e |
| 2017 | 93 | -2 | 39.9 kBtu/ft² | 173 tCO₂e |
| 2016 | 95 | -1 | 46.4 kBtu/ft² | 199 tCO₂e |
| 2015 | 96 | 42.3 kBtu/ft² | 171 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
- 2001 8TH AVE
- City
- Seattle
- State
- Washington
- ZIP
- 98121
- Coordinates
- 47.61578, -122.33726
Within ~1 km
Nearby benchmarked buildings
- Seattle Convention Centerscore —
Convention Center · 1,842,925 sq ft
- Two Union Squarescore 96
Office · 1,605,578 sq ft
Office · 1,599,394 sq ft
- Day 1 Tower And Spheres (Amazon)score 93
Office · 1,599,230 sq ft
- Onni South Lake Unionscore 77
Multifamily Housing · 1,546,084 sq ft
- Us Bank Centerscore 87
Office · 1,536,606 sq ft
See also: most efficient in Seattle · biggest emitters
How does West 8th compare with other office buildings in Seattle?
The latest disclosures cover 497 office buildings in Seattle, out of 3,871 buildings citywide. Its site EUI of 22.9 kBtu/ft² is about half of the average of 44.8 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 81% below the group average of 0.7 kgCO₂e/ft².
At 758,043 sq ft, it is about 286% above the average floor area of 196,452 sq ft for those buildings. It was built in 2009, 44 years later than the group's average year built (1965). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has West 8th's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for West 8th, covering report years 2015–2025. Its ENERGY STAR score went from 96 in 2015 to 97 in 2023 (+1 points). Site EUI moved from 42.3 kBtu/ft² (2015) to 22.9 kBtu/ft² (2025), a 46% decrease. Reported emissions went from 171 tCO₂e to 71 tCO₂e over the same span (down 58%).
What does a site EUI of 22.9 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. West 8th's 22.9 kBtu/ft² across 758,043 sq ft works out to about 17.4 billion Btu (5,087 MWh-equivalent) in 2025. Its source EUI of 64.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 3,597,922 kWh of electricity and 51 therms of natural gas for the year.
Which law requires West 8th to report its energy use?
West 8th 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:334:2025). 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 office buildings in Seattle
- Century Square· 755,000 sq ft · score 83 (B)
- 1700 Seventh Building· 747,747 sq ft · EUI 35.8 kBtu/ft²
- 901 Fifth Avenue· 711,611 sq ft · score 78 (B)
- 2nd & Seneca Blds· 635,303 sq ft · score 95 (A)
- Block 31 - Google· 614,956 sq ft · score 89 (A)
- Amazon Phase Vi - Nessie And Bigfoot· 593,200 sq ft · score 95 (A)
- Office buildings in Seattle· 497 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 West 8th's energy grade?
West 8th did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 22.9 kBtu/ft².
How much energy does West 8th use?
Its 2025 site energy-use intensity was 22.9 kBtu/ft² (64.2 kBtu/ft² source) across 758,043 sq ft, including 3,597,922 kWh of electricity and 51 therms of natural gas.
What are West 8th's carbon emissions?
West 8th reported 71 tCO₂e of greenhouse-gas emissions (0.1 kgCO₂e/ft²) for 2025.
Where is West 8th?
West 8th is at 2001 8TH AVE, in Seattle, Washington 98121. Its coordinates are 47.61578, -122.33726 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is West 8th and when was it built?
West 8th has 758,043 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 2009 as its year built. It is classed as office.
Is West 8th 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, “West 8th, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/west-8th-4c4ba3ed (data as of October 2, 2026).