Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 88 (band A) |
| Site EUI | 28.8 kBtu/ft² |
| Source EUI | 80.5 kBtu/ft² |
| GHG emissions | 65 tCO₂e |
| GHG intensity | 0.2 kgCO₂e/ft² |
| Electricity | 3,284,330 kWh |
| Gross floor area | 516,342 sq ft |
| Source record | seattle:326:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 88 | +4 | 28.8 kBtu/ft² | 65 tCO₂e |
| 2024 | 84 | +5 | 32.1 kBtu/ft² | 73 tCO₂e |
| 2023 | 79 | +2 | 35.2 kBtu/ft² | 80 tCO₂e |
| 2022 | 77 | ±0 | 37.2 kBtu/ft² | 84 tCO₂e |
| 2021 | 77 | -14 | 37.8 kBtu/ft² | 85 tCO₂e |
| 2020 | 91 | +16 | 44.2 kBtu/ft² | 101 tCO₂e |
| 2019 | 75 | ±0 | 57.3 kBtu/ft² | 131 tCO₂e |
| 2018 | 75 | +11 | 57.4 kBtu/ft² | 131 tCO₂e |
| 2017 | 64 | -11 | 63.6 kBtu/ft² | 142 tCO₂e |
| 2016 | 75 | +4 | 63.6 kBtu/ft² | 144 tCO₂e |
| 2015 | 71 | 65.4 kBtu/ft² | 144 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
- 1601 5TH AVE
- City
- Seattle
- State
- Washington
- ZIP
- 98101
- Coordinates
- 47.61192, -122.33717
Within ~1 km
Nearby benchmarked buildings
- Columbia Centerscore 90
Office · 1,952,220 sq ft
- 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
- Russell Investments Centerscore 92
Office · 1,592,914 sq ft
See also: most efficient in Seattle · biggest emitters
Frequently asked questions
What is Westlake Tower's energy grade?
Westlake Tower scores 88 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 Westlake Tower use?
Its 2025 site energy-use intensity was 28.8 kBtu/ft² (80.5 kBtu/ft² source) across 516,342 sq ft, including 3,284,330 kWh of electricity.
What are Westlake Tower's carbon emissions?
Westlake Tower reported 65 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:326:2025.