O2 Apartments
Multifamily Housing in Seattle, WA · 2401 3RD AVE · 98121
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 93 (band A) |
| Site EUI | 34.8 kBtu/ft² |
| Source EUI | 71.6 kBtu/ft² |
| GHG emissions | 126 tCO₂e |
| GHG intensity | 0.9 kgCO₂e/ft² |
| Electricity | 832,040 kWh |
| Natural gas | 20,852 therms |
| Gross floor area | 167,344 sq ft |
| Source record | seattle:50377:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 93 | +16 | 34.8 kBtu/ft² | 126 tCO₂e |
| 2024 | 77 | -17 | 47.5 kBtu/ft² | 220 tCO₂e |
| 2023 | 94 | ±0 | 34.2 kBtu/ft² | 121 tCO₂e |
| 2022 | 94 | ±0 | 35.7 kBtu/ft² | 133 tCO₂e |
| 2021 | 94 | -1 | 36.5 kBtu/ft² | 147 tCO₂e |
| 2020 | 95 | -5 | 33.5 kBtu/ft² | 131 tCO₂e |
| 2019 | 100 | 21.4 kBtu/ft² | 89 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
- 2401 3RD AVE
- City
- Seattle
- State
- Washington
- ZIP
- 98121
- Coordinates
- 47.61543, -122.34651
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
Frequently asked questions
What is O2 Apartments's energy grade?
O2 Apartments 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 O2 Apartments use?
Its 2025 site energy-use intensity was 34.8 kBtu/ft² (71.6 kBtu/ft² source) across 167,344 sq ft, including 832,040 kWh of electricity and 20,852 therms of natural gas.
What are O2 Apartments's carbon emissions?
O2 Apartments reported 126 tCO₂e of greenhouse-gas emissions (0.9 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:50377:2025.