Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 90 (band A) |
| Site EUI | 41.2 kBtu/ft² |
| Source EUI | 108.1 kBtu/ft² |
| GHG emissions | 46 tCO₂e |
| GHG intensity | 0.2 kgCO₂e/ft² |
| Electricity | 2,390,515 kWh |
| Natural gas | 9,061 therms |
| Gross floor area | 381,511 sq ft |
| Source record | seattle:814:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 90 | +8 | 41.2 kBtu/ft² | 46 tCO₂e |
| 2024 | 82 | +6 | 48.9 kBtu/ft² | 100 tCO₂e |
| 2023 | 76 | +3 | 54.0 kBtu/ft² | 103 tCO₂e |
| 2022 | 73 | -3 | 57.3 kBtu/ft² | 99 tCO₂e |
| 2021 | 76 | -3 | 56.9 kBtu/ft² | 123 tCO₂e |
| 2020 | 79 | +4 | 54.9 kBtu/ft² | 101 tCO₂e |
| 2019 | 75 | ±0 | 62.1 kBtu/ft² | 101 tCO₂e |
| 2018 | 75 | +3 | 63.0 kBtu/ft² | 109 tCO₂e |
| 2017 | 72 | -16 | 60.6 kBtu/ft² | 111 tCO₂e |
| 2016 | 88 | +3 | 51.8 kBtu/ft² | 93 tCO₂e |
| 2015 | 85 | 53.7 kBtu/ft² | 92 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
- 1505 WESTLAKE AVE N
- City
- Seattle
- State
- Washington
- ZIP
- 98109
- Coordinates
- 47.63264, -122.34171
Within ~1 km
Nearby benchmarked buildings
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Multifamily Housing · 395,317 sq ft
- Westlake Steps & Marina Sluscore 99
Multifamily Housing · 393,641 sq ft
- Juxt Apartments (2017)score 100
Multifamily Housing · 391,386 sq ft
See also: most efficient in Seattle · biggest emitters
Frequently asked questions
What is West Lake Union Center's energy grade?
West Lake Union Center scores 90 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 West Lake Union Center use?
Its 2025 site energy-use intensity was 41.2 kBtu/ft² (108.1 kBtu/ft² source) across 381,511 sq ft, including 2,390,515 kWh of electricity and 9,061 therms of natural gas.
What are West Lake Union Center's carbon emissions?
West Lake Union Center reported 46 tCO₂e of greenhouse-gas emissions (0.2 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:814:2025.