Commodore Duchess Apts (Uw Housing)
Multifamily Housing in Seattle, WA · 4005 15TH AVE NE · 98105
At a glance
Commodore Duchess Apts (Uw Housing) is a 97,923-square-foot multifamily housing building at 4005 15TH AVE NE in Seattle, Washington, built in 1925.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | — |
| Source EUI | — |
| GHG emissions | — |
| GHG intensity | — |
| Natural gas | 556 therms |
| Gross floor area | 97,923 sq ft |
| Source record | seattle:29390:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | — | — | |
| 2024 | 46 | +8 | 81.6 kBtu/ft² | 538 tCO₂e |
| 2023 | 38 | +19 | 87.4 kBtu/ft² | 581 tCO₂e |
| 2022 | 19 | -5 | 106.4 kBtu/ft² | 733 tCO₂e |
| 2021 | 24 | -1 | 102.1 kBtu/ft² | 709 tCO₂e |
| 2020 | 25 | +5 | 97.9 kBtu/ft² | 678 tCO₂e |
| 2019 | 20 | +8 | 103.3 kBtu/ft² | 720 tCO₂e |
| 2018 | 12 | +8 | 132.4 kBtu/ft² | 642 tCO₂e |
| 2017 | 4 | -1 | 163.6 kBtu/ft² | 815 tCO₂e |
| 2016 | 5 | 147.5 kBtu/ft² | 718 tCO₂e | |
| 2015 | — | 24.7 kBtu/ft² | 13 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
- 4005 15TH AVE NE
- City
- Seattle
- State
- Washington
- ZIP
- 98105
- Coordinates
- 47.65570, -122.31244
Within ~1 km
Nearby benchmarked buildings
College/University · 15,216,474 sq ft
Hospital (General Medical & Surgical) · 1,739,802 sq ft
- The Standard At Seattlescore 100
Multifamily Housing · 612,844 sq ft
- Uw Tower Bldg Complexscore —
College/University · 417,035 sq ft
Multifamily Housing · 411,067 sq ft
- Chapter Building 1score 100
Office · 328,919 sq ft
See also: most efficient in Seattle · biggest emitters
How does Commodore Duchess Apts (Uw Housing) compare with other multifamily housing buildings in Seattle?
The latest disclosures cover 1,971 multifamily housing buildings in Seattle, out of 3,871 buildings citywide.
At 97,923 sq ft, it is about 13% above the average floor area of 86,468 sq ft for those buildings. It was built in 1925, 58 years earlier than the group's average year built (1983). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².
How has Commodore Duchess Apts (Uw Housing)'s energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Commodore Duchess Apts (Uw Housing), covering report years 2015–2025. Its ENERGY STAR score went from 5 in 2016 to 46 in 2024 (+41 points). Site EUI moved from 24.7 kBtu/ft² (2015) to 81.6 kBtu/ft² (2024), an 230% increase. Reported emissions went from 13 tCO₂e to 538 tCO₂e over the same span (up 4003%).
Which law requires Commodore Duchess Apts (Uw Housing) to report its energy use?
Commodore Duchess Apts (Uw Housing) 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:29390:2025). 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 multifamily housing buildings in Seattle
- Lumen Condo· 97,855 sq ft · score 99 (A)
- Metropolitan Park Apartments· 97,737 sq ft · score 96 (A)
- Elliott Pointe Apts· 97,517 sq ft · EUI 41.0 kBtu/ft²
- Landes Apartments· 97,490 sq ft · score 98 (A)
- Executive Estates - Bldg E· 97,254 sq ft · score 81 (B)
- Trader Joe's & Apartments· 97,229 sq ft · score 100 (A)
- Multifamily Housing buildings in Seattle· 1,971 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 Commodore Duchess Apts (Uw Housing)'s energy grade?
Commodore Duchess Apts (Uw Housing) did not report an ENERGY STAR score in its 2025 disclosure.
How much energy does Commodore Duchess Apts (Uw Housing) use?
No energy-use intensity was reported for 2025.
What are Commodore Duchess Apts (Uw Housing)'s carbon emissions?
No greenhouse-gas emissions figure was reported for 2025.
Where is Commodore Duchess Apts (Uw Housing)?
Commodore Duchess Apts (Uw Housing) is at 4005 15TH AVE NE, in Seattle, Washington 98105. Its coordinates are 47.65570, -122.31244 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Commodore Duchess Apts (Uw Housing) and when was it built?
Commodore Duchess Apts (Uw Housing) has 97,923 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1925 as its year built. It is classed as multifamily housing.
Is Commodore Duchess Apts (Uw Housing) 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, “Commodore Duchess Apts (Uw Housing), Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/commodore-duchess-apts-uw-housing-86c4ac6b (data as of October 2, 2026).