Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 81 (band B) |
| Site EUI | 42.5 kBtu/ft² |
| Source EUI | 118.9 kBtu/ft² |
| GHG emissions | 16 tCO₂e |
| GHG intensity | 0.2 kgCO₂e/ft² |
| Electricity | 830,972 kWh |
| Gross floor area | 87,178 sq ft |
| Source record | seattle:491:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 81 | 42.5 kBtu/ft² | 16 tCO₂e | |
| 2024 | — | — | — | |
| 2023 | 80 | +3 | 41.8 kBtu/ft² | 18 tCO₂e |
| 2022 | 77 | -1 | 44.7 kBtu/ft² | 19 tCO₂e |
| 2021 | 78 | +4 | 43.1 kBtu/ft² | 18 tCO₂e |
| 2020 | 74 | -5 | 43.4 kBtu/ft² | 18 tCO₂e |
| 2019 | 79 | -1 | 44.4 kBtu/ft² | 19 tCO₂e |
| 2018 | 80 | +14 | 47.4 kBtu/ft² | 18 tCO₂e |
| 2017 | 66 | -20 | 53.1 kBtu/ft² | 21 tCO₂e |
| 2016 | 86 | ±0 | 52.3 kBtu/ft² | 20 tCO₂e |
| 2015 | 86 | 51.4 kBtu/ft² | 21 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.
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Location
- Address
- 100 W HARRISON ST
- City
- Seattle
- State
- Washington
- ZIP
- 98119
- Coordinates
- 47.62224, -122.35850
Within ~1 km
Nearby benchmarked buildings
- Climate Pledge Arenascore —
Indoor Arena · 932,000 sq ft
- Olympus Aptsscore 97
Multifamily Housing · 590,869 sq ft
- Third And Broad Bldgscore 94
Office · 396,626 sq ft
- Armory - Seattle Centerscore —
Other · 396,085 sq ft
- 2601 ELLIOTT AVEscore —
Office · 350,310 sq ft
Multifamily Housing · 308,940 sq ft
See also: most efficient in Seattle · biggest emitters
Frequently asked questions
What is South Tower's energy grade?
South Tower scores 81 out of 100 on ENERGY STAR — band B (Above median (70–84)) — in its 2025 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does South Tower use?
Its 2025 site energy-use intensity was 42.5 kBtu/ft² (118.9 kBtu/ft² source) across 87,178 sq ft, including 830,972 kWh of electricity.
What are South Tower's carbon emissions?
South Tower reported 16 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:491:2025.