Wilson Court Condominium
Multifamily Housing in Seattle, WA · 420 VALLEY ST · 98109
At a glance
Wilson Court Condominium is a 27,480-square-foot multifamily housing building at 420 VALLEY ST in Seattle, Washington, built in 1991.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | — |
| Source EUI | — |
| GHG emissions | — |
| GHG intensity | — |
| Electricity | 69,746 kWh |
| Gross floor area | 27,480 sq ft |
| Source record | seattle:26166:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | — | — | |
| 2024 | 100 | ±0 | 17.4 kBtu/ft² | 14 tCO₂e |
| 2023 | 100 | 19.3 kBtu/ft² | 16 tCO₂e | |
| 2022 | — | — | 1 tCO₂e | |
| 2021 | 100 | ±0 | 21.0 kBtu/ft² | 20 tCO₂e |
| 2020 | 100 | ±0 | 19.5 kBtu/ft² | 17 tCO₂e |
| 2019 | 100 | ±0 | 17.3 kBtu/ft² | 15 tCO₂e |
| 2018 | 100 | +11 | 21.9 kBtu/ft² | 19 tCO₂e |
| 2017 | 89 | +20 | 51.4 kBtu/ft² | 52 tCO₂e |
| 2016 | 69 | +3 | 56.4 kBtu/ft² | 56 tCO₂e |
| 2015 | 66 | 57.0 kBtu/ft² | 56 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
- 420 VALLEY ST
- City
- Seattle
- State
- Washington
- ZIP
- 98109
- Coordinates
- 47.62651, -122.34795
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does Wilson Court Condominium compare with other multifamily housing buildings in Seattle?
The latest disclosures cover 1,971 multifamily housing buildings in Seattle, out of 3,871 buildings citywide.
At 27,480 sq ft, it is about 68% below the average floor area of 86,468 sq ft for those buildings. It was built in 1991, 8 years later than the group's average year built (1983). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².
How has Wilson Court Condominium's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Wilson Court Condominium, covering report years 2015–2025. Its ENERGY STAR score went from 66 in 2015 to 100 in 2024 (+34 points); its best year on file was 2018, at 100. Site EUI moved from 57.0 kBtu/ft² (2015) to 17.4 kBtu/ft² (2024), a 69% decrease. Reported emissions went from 56 tCO₂e to 14 tCO₂e over the same span (down 75%).
Which law requires Wilson Court Condominium to report its energy use?
Wilson Court Condominium reports under the Seattle Energy Benchmarking Ordinance (SMC 22.920), the legal basis of Seattle's Building Energy Benchmarking program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2025 disclosure (source record seattle:26166:2025). 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.
More multifamily housing buildings in Seattle
- 1111 East Pike· 27,468 sq ft · score 57 (C)
- Woodland Crest Condominium· 27,432 sq ft · score 98 (A)
- Northgate View Apts· 27,344 sq ft · EUI 31.6 kBtu/ft²
- Coyote Restaurant/Apartment· 27,328 sq ft · score 56 (C)
- Lorington Apts· 27,328 sq ft · score 71 (B)
- Summit Arms· 27,320 sq ft · score 78 (B)
- Multifamily Housing buildings in Seattle· 1,971 benchmarked
- All Seattle benchmarked buildings· Seattle Energy Benchmarking Ordinance (SMC 22.920)
- Most efficient large buildings in Seattle
- Least efficient large buildings in Seattle
- Biggest emitters in Seattle
Frequently asked questions
What is Wilson Court Condominium's energy grade?
Wilson Court Condominium did not report an ENERGY STAR score in its 2025 disclosure.
How much energy does Wilson Court Condominium use?
No energy-use intensity was reported for 2025.
What are Wilson Court Condominium's carbon emissions?
No greenhouse-gas emissions figure was reported for 2025.
Where is Wilson Court Condominium?
Wilson Court Condominium is at 420 VALLEY ST, in Seattle, Washington 98109. Its coordinates are 47.62651, -122.34795 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Wilson Court Condominium and when was it built?
Wilson Court Condominium has 27,480 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1991 as its year built. It is classed as multifamily housing.
Is Wilson Court Condominium covered by the Seattle Energy Benchmarking Ordinance (SMC 22.920)?
Yes — it appears in the 2025 Building Energy Benchmarking disclosure, which lists the buildings reporting under the Seattle Energy Benchmarking Ordinance (SMC 22.920).
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About this data
Source: Building Energy Benchmarking (Seattle Energy Benchmarking Ordinance (SMC 22.920)), as published October 2, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “Wilson Court Condominium, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/wilson-court-condominium-788caa0b (data as of October 2, 2026).