At a glance
1918 Eighth Ave is a 824,887-square-foot office building at 1918 8TH AVE in Seattle, Washington, built in 2009. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 83 out of 100 (grade B), a site energy-use intensity of 42.4 kBtu/ft² and 183 tCO₂e of greenhouse-gas emissions. That score is higher than 49% of the 378 scored office buildings in Seattle.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 83 (band B) |
| Site EUI | 42.4 kBtu/ft² |
| Source EUI | 118.7 kBtu/ft² |
| GHG emissions | 183 tCO₂e |
| GHG intensity | 0.3 kgCO₂e/ft² |
| Electricity | 9,241,310 kWh |
| Natural gas | 4 therms |
| Gross floor area | 824,887 sq ft |
| Source record | seattle:336:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 83 | -5 | 42.4 kBtu/ft² | 183 tCO₂e |
| 2024 | 88 | -7 | 37.9 kBtu/ft² | 164 tCO₂e |
| 2023 | 95 | +11 | 37.9 kBtu/ft² | 164 tCO₂e |
| 2022 | 84 | +3 | 42.0 kBtu/ft² | 184 tCO₂e |
| 2021 | 81 | +1 | 44.3 kBtu/ft² | 198 tCO₂e |
| 2020 | 80 | -7 | 47.9 kBtu/ft² | 216 tCO₂e |
| 2019 | 87 | -1 | 52.0 kBtu/ft² | 230 tCO₂e |
| 2018 | 88 | +3 | 53.9 kBtu/ft² | 239 tCO₂e |
| 2017 | 85 | -12 | 55.8 kBtu/ft² | 240 tCO₂e |
| 2016 | 97 | ±0 | 53.2 kBtu/ft² | 229 tCO₂e |
| 2015 | 97 | 51.6 kBtu/ft² | 223 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
- 1918 8TH AVE
- City
- Seattle
- State
- Washington
- ZIP
- 98101
- Coordinates
- 47.61555, -122.33582
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 1918 Eighth Ave compare with other office buildings in Seattle?
The latest disclosures cover 497 office buildings in Seattle, out of 3,871 buildings citywide. 1918 Eighth Ave's ENERGY STAR score of 83 compares with an average of 76 across the 378 that report a score; it scores higher than 49% of them and lower than 49%. Its site EUI of 42.4 kBtu/ft² is roughly in line with 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 0.3 kgCO₂e/ft² is about 64% below the group average of 0.7 kgCO₂e/ft².
At 824,887 sq ft, it is about 320% 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 1918 Eighth Ave's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for 1918 Eighth Ave, covering report years 2015–2025. Its ENERGY STAR score went from 97 in 2015 to 83 in 2025 (-14 points); its best year on file was 2015, at 97. Site EUI moved from 51.6 kBtu/ft² (2015) to 42.4 kBtu/ft² (2025), a 18% decrease. Reported emissions went from 223 tCO₂e to 183 tCO₂e over the same span (down 18%).
What does an ENERGY STAR score of 83 mean?
ENERGY STAR scores run from 1 to 100 and are computed by the EPA's Portfolio Manager as a percentile against similar buildings nationwide, adjusted for climate, size and use: a score of 83 means the building performs better than about 83% of its national peers. BuildingCensus bands the score into report-card grades; 83 falls in band B — above median (70–84). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. In Seattle, 69% of scored buildings are at 75 or above.
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. 1918 Eighth Ave's 42.4 kBtu/ft² across 824,887 sq ft works out to about 35 billion Btu (10,250 MWh-equivalent) in 2025. Its source EUI of 118.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 9,241,310 kWh of electricity and 4 therms of natural gas for the year.
Which law requires 1918 Eighth Ave to report its energy use?
1918 Eighth Ave 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:336:2025). 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
- One Union Square· 794,592 sq ft · score 95 (A)
- Centurylink: Seattle Bell Plaza· 791,396 sq ft · score 91 (A)
- 1111 3rd Ave Building· 776,762 sq ft · score 85 (A)
- West 8th· 758,043 sq ft · EUI 22.9 kBtu/ft²
- Century Square· 755,000 sq ft · score 83 (B)
- 1700 Seventh Building· 747,747 sq ft · EUI 35.8 kBtu/ft²
- 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 1918 Eighth Ave's energy grade?
1918 Eighth Ave scores 83 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2025 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 1918 Eighth Ave use?
Its 2025 site energy-use intensity was 42.4 kBtu/ft² (118.7 kBtu/ft² source) across 824,887 sq ft, including 9,241,310 kWh of electricity and 4 therms of natural gas.
What are 1918 Eighth Ave's carbon emissions?
1918 Eighth Ave reported 183 tCO₂e of greenhouse-gas emissions (0.3 kgCO₂e/ft²) for 2025.
Where is 1918 Eighth Ave?
1918 Eighth Ave is at 1918 8TH AVE, in Seattle, Washington 98101. Its coordinates are 47.61555, -122.33582 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 1918 Eighth Ave and when was it built?
1918 Eighth Ave has 824,887 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 1918 Eighth Ave 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).
Working with Seattle building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “1918 Eighth Ave, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/1918-eighth-ave-252c444b (data as of October 2, 2026).