WESTRIDGE PARK APARTMENTS (7901)
Multifamily LR (1-4) in Seattle, WA · 7901 DELRIDGE WAY SW · 98106
At a glance
WESTRIDGE PARK APARTMENTS (7901) is a 131,307-square-foot multifamily LR (1-4) building at 7901 DELRIDGE WAY SW in Seattle, Washington, built in 1990. In its 2023 Seattle benchmarking disclosure it reported an ENERGY STAR score of 57 out of 100 (grade C), a site energy-use intensity of 2.3 kBtu/ft² and 28 tCO₂e of greenhouse-gas emissions. That score is higher than 20% of the 25 scored multifamily LR (1-4) buildings in Seattle.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 57 (band C) |
| Site EUI | 2.3 kBtu/ft² |
| Source EUI | 3.4 kBtu/ft² |
| GHG emissions | 28 tCO₂e |
| GHG intensity | 0.1 kgCO₂e/ft² |
| Electricity | 48,740 kWh |
| Natural gas | 5,148 therms |
| Gross floor area | 131,307 sq ft |
| Source record | seattle:25761:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 57 | -34 | 2.3 kBtu/ft² | 28 tCO₂e |
| 2022 | 91 | +74 | 24.9 kBtu/ft² | 70 tCO₂e |
| 2021 | 17 | -4 | 50.1 kBtu/ft² | 60 tCO₂e |
| 2020 | 21 | ±0 | 44.6 kBtu/ft² | 36 tCO₂e |
| 2019 | 21 | +5 | 45.9 kBtu/ft² | 45 tCO₂e |
| 2018 | 16 | -47 | 48.9 kBtu/ft² | 61 tCO₂e |
| 2017 | 63 | +13 | 46.6 kBtu/ft² | 46 tCO₂e |
| 2016 | 50 | -7 | 47.3 kBtu/ft² | 52 tCO₂e |
| 2015 | 57 | 44.8 kBtu/ft² | 45 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
- 7901 DELRIDGE WAY SW
- City
- Seattle
- State
- Washington
- ZIP
- 98106
- Coordinates
- 47.53144, -122.36076
Within ~1 km
Nearby benchmarked buildings
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See also: most efficient in Seattle · biggest emitters
How does WESTRIDGE PARK APARTMENTS (7901) compare with other multifamily LR (1-4) buildings in Seattle?
The latest disclosures cover 53 multifamily LR (1-4) buildings in Seattle, out of 3,871 buildings citywide. WESTRIDGE PARK APARTMENTS (7901)'s ENERGY STAR score of 57 compares with an average of 73 across the 25 that report a score; it scores higher than 20% of them and lower than 72%. Its site EUI of 2.3 kBtu/ft² is about 94% below the average of 40.1 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.1 kgCO₂e/ft² is about 89% below the group average of 0.9 kgCO₂e/ft².
At 131,307 sq ft, it is about 186% above the average floor area of 45,933 sq ft for those buildings. It was built in 1990, 14 years later than the group's average year built (1976).
How has WESTRIDGE PARK APARTMENTS (7901)'s energy performance changed over time?
BuildingCensus holds 9 Seattle disclosures for WESTRIDGE PARK APARTMENTS (7901), covering report years 2015–2023. Its ENERGY STAR score was 57 in both 2015 and 2023. Site EUI moved from 44.8 kBtu/ft² (2015) to 2.3 kBtu/ft² (2023), a 95% decrease. Reported emissions went from 45 tCO₂e to 28 tCO₂e over the same span (down 38%).
What does an ENERGY STAR score of 57 mean?
ENERGY STAR scores run from 1 to 100 and are computed by the EPA's Portfolio Manager as a percentile against similar buildings nationwide, adjusted for climate, size and use: a score of 57 means the building performs better than about 57% of its national peers. BuildingCensus bands the score into report-card grades; 57 falls in band C — below median (55–69). It sits 18 points below 75, the threshold for ENERGY STAR certification. In Seattle, 69% of scored buildings are at 75 or above.
Site energy-use intensity (EUI) is the energy a building uses on site in a year divided by its floor area, in thousand Btu per square foot — lower is more efficient. WESTRIDGE PARK APARTMENTS (7901)'s 2.3 kBtu/ft² across 131,307 sq ft works out to about 0.3 billion Btu (89 MWh-equivalent) in 2023. Its source EUI of 3.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 48,740 kWh of electricity and 5,148 therms of natural gas for the year.
Which law requires WESTRIDGE PARK APARTMENTS (7901) to report its energy use?
WESTRIDGE PARK APARTMENTS (7901) 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 2023 disclosure (source record seattle:25761:2023). 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 LR (1-4) buildings in Seattle
- THORNTON PLACE APTS BLD 4 (CHILD PROPERTY FOR #52046)· 102,522 sq ft · score 64 (C)
- WESTRIDGE PARK APARTMENTS (7701)· 95,865 sq ft · score 100 (A)
- NELSON APARTMENTS· 95,353 sq ft · score 95 (A)
- FLORERA· 82,486 sq ft · score 96 (A)
- LAKESIDE AT LESCHI RESIDENTIAL CONDOMINIUM· 63,236 sq ft · EUI 31.6 kBtu/ft²
- MADISON APTS- FIRE/WILL BE DEMO'D· 54,770 sq ft · score 3 (D)
- Multifamily LR (1-4) buildings in Seattle· 53 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 WESTRIDGE PARK APARTMENTS (7901)'s energy grade?
WESTRIDGE PARK APARTMENTS (7901) scores 57 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2023 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does WESTRIDGE PARK APARTMENTS (7901) use?
Its 2023 site energy-use intensity was 2.3 kBtu/ft² (3.4 kBtu/ft² source) across 131,307 sq ft, including 48,740 kWh of electricity and 5,148 therms of natural gas.
What are WESTRIDGE PARK APARTMENTS (7901)'s carbon emissions?
WESTRIDGE PARK APARTMENTS (7901) reported 28 tCO₂e of greenhouse-gas emissions (0.1 kgCO₂e/ft²) for 2023.
Where is WESTRIDGE PARK APARTMENTS (7901)?
WESTRIDGE PARK APARTMENTS (7901) is at 7901 DELRIDGE WAY SW, in Seattle, Washington 98106. Its coordinates are 47.53144, -122.36076 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is WESTRIDGE PARK APARTMENTS (7901) and when was it built?
WESTRIDGE PARK APARTMENTS (7901) has 131,307 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1990 as its year built. It is classed as multifamily LR (1-4).
Is WESTRIDGE PARK APARTMENTS (7901) covered by the Seattle Energy Benchmarking Ordinance (SMC 22.920)?
Yes — it appears in the 2023 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, “WESTRIDGE PARK APARTMENTS (7901), Seattle, Washington — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/westridge-park-apartments-7901-40e3c648 (data as of October 2, 2026).