At a glance
Chinook Bldg - King County is a 372,242-square-foot office building at 401 5TH AVE in Seattle, Washington, built in 2006. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 98 out of 100 (grade A), a site energy-use intensity of 49.9 kBtu/ft² and 369 tCO₂e of greenhouse-gas emissions. That score is higher than 93% 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 | 98 (band A) |
| Site EUI | 49.9 kBtu/ft² |
| Source EUI | 101.6 kBtu/ft² |
| GHG emissions | 369 tCO₂e |
| GHG intensity | 1.3 kgCO₂e/ft² |
| Electricity | 2,341,287 kWh |
| Natural gas | 62,037 therms |
| Gross floor area | 372,242 sq ft |
| Source record | seattle:360:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 98 | +9 | 49.9 kBtu/ft² | 369 tCO₂e |
| 2024 | 89 | ±0 | 49.8 kBtu/ft² | 368 tCO₂e |
| 2023 | 89 | +1 | 48.7 kBtu/ft² | 357 tCO₂e |
| 2022 | 88 | ±0 | 54.7 kBtu/ft² | 451 tCO₂e |
| 2021 | 88 | -7 | 51.4 kBtu/ft² | 382 tCO₂e |
| 2020 | 95 | -1 | 55.7 kBtu/ft² | 312 tCO₂e |
| 2019 | 96 | ±0 | 51.9 kBtu/ft² | 252 tCO₂e |
| 2018 | 96 | +1 | 47.4 kBtu/ft² | 198 tCO₂e |
| 2017 | 95 | -3 | 50.4 kBtu/ft² | 216 tCO₂e |
| 2016 | 98 | ±0 | 43.3 kBtu/ft² | 203 tCO₂e |
| 2015 | 98 | 40.5 kBtu/ft² | 220 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
- 401 5TH AVE
- City
- Seattle
- State
- Washington
- ZIP
- 98104
- Coordinates
- 47.60249, -122.32854
Within ~1 km
Nearby benchmarked buildings
Parking · 2,080,885 sq ft
- Columbia Centerscore 90
Office · 1,952,220 sq ft
Hospital (General Medical & Surgical) · 1,926,841 sq ft
- Centurylink Field-Stadiumscore —
Stadium (Open) · 1,913,640 sq ft
- Two Union Squarescore 96
Office · 1,605,578 sq ft
Office · 1,527,817 sq ft
See also: most efficient in Seattle · biggest emitters
How does Chinook Bldg - King County compare with other office buildings in Seattle?
The latest disclosures cover 497 office buildings in Seattle, out of 3,871 buildings citywide. Chinook Bldg - King County's ENERGY STAR score of 98 compares with an average of 76 across the 378 that report a score; it scores higher than 93% of them and lower than 5%. Its site EUI of 49.9 kBtu/ft² is about 11% above the average of 44.8 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 1.3 kgCO₂e/ft² is about 86% above the group average of 0.7 kgCO₂e/ft².
At 372,242 sq ft, it is about 89% above the average floor area of 196,452 sq ft for those buildings. It was built in 2006, 41 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 Chinook Bldg - King County's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Chinook Bldg - King County, covering report years 2015–2025. Its ENERGY STAR score was 98 in both 2015 and 2025. Site EUI moved from 40.5 kBtu/ft² (2015) to 49.9 kBtu/ft² (2025), an 23% increase. Reported emissions went from 220 tCO₂e to 369 tCO₂e over the same span (up 68%).
What does an ENERGY STAR score of 98 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 98 means the building performs better than about 98% of its national peers. BuildingCensus bands the score into report-card grades; 98 falls in band A — high performer (85–100). 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. Chinook Bldg - King County's 49.9 kBtu/ft² across 372,242 sq ft works out to about 18.6 billion Btu (5,444 MWh-equivalent) in 2025. Its source EUI of 101.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,341,287 kWh of electricity and 62,037 therms of natural gas for the year.
Which law requires Chinook Bldg - King County to report its energy use?
Chinook Bldg - 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:360:2025). 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
- Arbor Blocks East - Facebook· 365,449 sq ft · EUI 27.3 kBtu/ft²
- 818 Stewart· 362,033 sq ft · score 84 (B)
- 2601 ELLIOTT AVE· 350,310 sq ft · EUI 13.7 kBtu/ft²
- Tableau (North Edge)· 338,989 sq ft · score 88 (A)
- Stanford Center Offices (Sps-District)· 338,063 sq ft · EUI 44.7 kBtu/ft²
- Alley 24 East· 336,700 sq ft · score 89 (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 Chinook Bldg - King County's energy grade?
Chinook Bldg - King County scores 98 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2025 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Chinook Bldg - King County use?
Its 2025 site energy-use intensity was 49.9 kBtu/ft² (101.6 kBtu/ft² source) across 372,242 sq ft, including 2,341,287 kWh of electricity and 62,037 therms of natural gas.
What are Chinook Bldg - King County's carbon emissions?
Chinook Bldg - King County reported 369 tCO₂e of greenhouse-gas emissions (1.3 kgCO₂e/ft²) for 2025.
Where is Chinook Bldg - King County?
Chinook Bldg - King County is at 401 5TH AVE, in Seattle, Washington 98104. Its coordinates are 47.60249, -122.32854 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Chinook Bldg - King County and when was it built?
Chinook Bldg - King County has 372,242 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 2006 as its year built. It is classed as office.
Is Chinook Bldg - 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).
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, “Chinook Bldg - King County, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/chinook-bldg-king-county-14f69a2e (data as of October 2, 2026).