Adelphi Apts
Multifamily Housing in Seattle, WA · 230 23RD AVE E · 98112
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 91 (band A) |
| Site EUI | 43.5 kBtu/ft² |
| Source EUI | 58.9 kBtu/ft² |
| GHG emissions | 50 tCO₂e |
| GHG intensity | 1.9 kgCO₂e/ft² |
| Electricity | 56,461 kWh |
| Natural gas | 9,157 therms |
| Gross floor area | 25,475 sq ft |
| Source record | seattle:20447:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 91 | +19 | 43.5 kBtu/ft² | 50 tCO₂e |
| 2024 | 72 | -14 | 56.5 kBtu/ft² | 68 tCO₂e |
| 2023 | 86 | +6 | 50.0 kBtu/ft² | 60 tCO₂e |
| 2022 | 80 | -5 | 54.0 kBtu/ft² | 63 tCO₂e |
| 2021 | 85 | +4 | 48.9 kBtu/ft² | 56 tCO₂e |
| 2020 | 81 | -4 | 46.6 kBtu/ft² | 53 tCO₂e |
| 2019 | 85 | -2 | 45.5 kBtu/ft² | 53 tCO₂e |
| 2018 | 87 | -2 | 44.3 kBtu/ft² | 51 tCO₂e |
| 2017 | 89 | +3 | 47.6 kBtu/ft² | 55 tCO₂e |
| 2016 | 86 | +1 | 43.9 kBtu/ft² | 50 tCO₂e |
| 2015 | 85 | 43.1 kBtu/ft² | 48 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
- 230 23RD AVE E
- City
- Seattle
- State
- Washington
- ZIP
- 98112
- Coordinates
- 47.62117, -122.30226
Within ~1 km
Nearby benchmarked buildings
Multifamily Housing · 436,074 sq ft
- East Union Apartmentsscore 21
Multifamily Housing · 184,974 sq ft
Multifamily Housing · 183,379 sq ft
- Lawrence Loftsscore 97
Multifamily Housing · 174,654 sq ft
- Holy Names Academyscore 96
K-12 School · 168,239 sq ft
- Twenty 20 Mad Apartmentsscore —
Multifamily Housing · 151,166 sq ft
See also: most efficient in Seattle · biggest emitters
Frequently asked questions
What is Adelphi Apts's energy grade?
Adelphi Apts scores 91 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 Adelphi Apts use?
Its 2025 site energy-use intensity was 43.5 kBtu/ft² (58.9 kBtu/ft² source) across 25,475 sq ft, including 56,461 kWh of electricity and 9,157 therms of natural gas.
What are Adelphi Apts's carbon emissions?
Adelphi Apts reported 50 tCO₂e of greenhouse-gas emissions (1.9 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.
Working with Seattle building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
Dataset updated . Source: Building Energy Benchmarking disclosure, record seattle:20447:2025.