Porter Apt
Multifamily Housing in Seattle, WA · 1630 BOYLSTON AVE · 98122
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 53 (band D) |
| Site EUI | 76.6 kBtu/ft² |
| Source EUI | 98.1 kBtu/ft² |
| GHG emissions | 89 tCO₂e |
| GHG intensity | 3.4 kgCO₂e/ft² |
| Electricity | 77,638 kWh |
| Natural gas | 17,455 therms |
| Gross floor area | 26,246 sq ft |
| Source record | seattle:26008:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 53 | +17 | 76.6 kBtu/ft² | 89 tCO₂e |
| 2024 | 36 | +19 | 87.4 kBtu/ft² | 109 tCO₂e |
| 2023 | 17 | +15 | 97.9 kBtu/ft² | 119 tCO₂e |
| 2022 | 2 | +1 | 150.5 kBtu/ft² | 198 tCO₂e |
| 2021 | 1 | -79 | 165.3 kBtu/ft² | 221 tCO₂e |
| 2020 | 80 | +29 | 61.6 kBtu/ft² | 76 tCO₂e |
| 2019 | 51 | -1 | 77.7 kBtu/ft² | 97 tCO₂e |
| 2018 | 52 | ±0 | 74.7 kBtu/ft² | 92 tCO₂e |
| 2017 | 52 | -8 | 79.4 kBtu/ft² | 99 tCO₂e |
| 2016 | 60 | +16 | 72.1 kBtu/ft² | 89 tCO₂e |
| 2015 | 44 | 80.0 kBtu/ft² | 99 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
- 1630 BOYLSTON AVE
- City
- Seattle
- State
- Washington
- ZIP
- 98122
- Coordinates
- 47.61619, -122.32309
Within ~1 km
Nearby benchmarked buildings
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Parking · 2,080,885 sq ft
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Multifamily Housing · 766,545 sq ft
- Horizon Housescore 92
Senior Living Community · 756,740 sq ft
- 1101 Madison Towerscore 70
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- The Danforthscore 100
Multifamily Housing · 592,484 sq ft
See also: most efficient in Seattle · biggest emitters
Frequently asked questions
What is Porter Apt's energy grade?
Porter Apt scores 53 out of 100 on ENERGY STAR — band D (Lowest band (1–54)) — in its 2025 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Porter Apt use?
Its 2025 site energy-use intensity was 76.6 kBtu/ft² (98.1 kBtu/ft² source) across 26,246 sq ft, including 77,638 kWh of electricity and 17,455 therms of natural gas.
What are Porter Apt's carbon emissions?
Porter Apt reported 89 tCO₂e of greenhouse-gas emissions (3.4 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:26008:2025.