Duwamish Head Condominium
Multifamily Housing in Seattle, WA · 1140 ALKI AVE SW · 98116
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 93 (band A) |
| Site EUI | 26.9 kBtu/ft² |
| Source EUI | 62.3 kBtu/ft² |
| GHG emissions | 21 tCO₂e |
| GHG intensity | 0.5 kgCO₂e/ft² |
| Electricity | 236,858 kWh |
| Natural gas | 3,070 therms |
| Gross floor area | 41,510 sq ft |
| Source record | seattle:21619:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 93 | +3 | 26.9 kBtu/ft² | 21 tCO₂e |
| 2024 | 90 | +2 | 29.1 kBtu/ft² | 26 tCO₂e |
| 2023 | 88 | +3 | 29.6 kBtu/ft² | 23 tCO₂e |
| 2022 | 85 | +2 | 31.8 kBtu/ft² | 25 tCO₂e |
| 2021 | 83 | +2 | 31.3 kBtu/ft² | 23 tCO₂e |
| 2020 | 81 | -2 | 30.9 kBtu/ft² | 23 tCO₂e |
| 2019 | 83 | +1 | 30.0 kBtu/ft² | 21 tCO₂e |
| 2018 | 82 | +1 | 30.3 kBtu/ft² | 22 tCO₂e |
| 2017 | 81 | +7 | 31.6 kBtu/ft² | 21 tCO₂e |
| 2016 | 74 | +1 | 29.5 kBtu/ft² | 19 tCO₂e |
| 2015 | 73 | 30.8 kBtu/ft² | 22 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
- 1140 ALKI AVE SW
- City
- Seattle
- State
- Washington
- ZIP
- 98116
- Coordinates
- 47.59491, -122.38654
Within ~1 km
Nearby benchmarked buildings
- Infinity Shore Clubscore 60
Multifamily Housing · 107,799 sq ft
- Seabird Condominiumscore 76
Multifamily Housing · 72,155 sq ft
- Harbor Avenue Campusscore —
Office · 66,473 sq ft
- Harbor Park Condominiumscore 38
Multifamily Housing · 63,414 sq ft
Residential Care Facility · 54,863 sq ft
- Alki Condominiumscore 49
Multifamily Housing · 45,878 sq ft
See also: most efficient in Seattle · biggest emitters
Frequently asked questions
What is Duwamish Head Condominium's energy grade?
Duwamish Head Condominium scores 93 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 Duwamish Head Condominium use?
Its 2025 site energy-use intensity was 26.9 kBtu/ft² (62.3 kBtu/ft² source) across 41,510 sq ft, including 236,858 kWh of electricity and 3,070 therms of natural gas.
What are Duwamish Head Condominium's carbon emissions?
Duwamish Head Condominium reported 21 tCO₂e of greenhouse-gas emissions (0.5 kgCO₂e/ft²) for 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.
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Dataset updated . Source: Building Energy Benchmarking disclosure, record seattle:21619:2025.