Strata Apts
Multifamily Housing in Seattle, WA · 6312 CALIFORNIA AVE SW · 98136
At a glance
Strata Apts is a 54,871-square-foot multifamily housing building at 6312 CALIFORNIA AVE SW in Seattle, Washington, built in 1987. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 70 out of 100 (grade B), a site energy-use intensity of 33.3 kBtu/ft² and 8 tCO₂e of greenhouse-gas emissions. That score is higher than 18% of the 1,652 scored multifamily housing buildings in Seattle.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 70 (band B) |
| Site EUI | 33.3 kBtu/ft² |
| Source EUI | 93.1 kBtu/ft² |
| GHG emissions | 8 tCO₂e |
| GHG intensity | 0.2 kgCO₂e/ft² |
| Electricity | 428,344 kWh |
| Gross floor area | 54,871 sq ft |
| Source record | seattle:24722:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 70 | +7 | 33.3 kBtu/ft² | 8 tCO₂e |
| 2024 | 63 | +8 | 34.7 kBtu/ft² | 9 tCO₂e |
| 2023 | 55 | +8 | 37.5 kBtu/ft² | 10 tCO₂e |
| 2022 | 47 | -19 | 40.3 kBtu/ft² | 10 tCO₂e |
| 2021 | 66 | +3 | 35.1 kBtu/ft² | 9 tCO₂e |
| 2020 | 63 | -9 | 34.6 kBtu/ft² | 9 tCO₂e |
| 2019 | 72 | -1 | 32.7 kBtu/ft² | 8 tCO₂e |
| 2018 | 73 | +10 | 32.2 kBtu/ft² | 8 tCO₂e |
| 2017 | 63 | ±0 | 34.9 kBtu/ft² | 9 tCO₂e |
| 2016 | 63 | -7 | 30.5 kBtu/ft² | 8 tCO₂e |
| 2015 | 70 | 29.2 kBtu/ft² | 8 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
- 6312 CALIFORNIA AVE SW
- City
- Seattle
- State
- Washington
- ZIP
- 98136
- Coordinates
- 47.54635, -122.38691
Within ~1 km
Nearby benchmarked buildings
- The Kenneyscore 37
Senior Living Community · 203,155 sq ft
- Westwaterscore 84
Multifamily Housing · 71,280 sq ft
K-12 School · 58,118 sq ft
- Cal-More Circle Aptsscore 96
Multifamily Housing · 51,490 sq ft
K-12 School · 39,929 sq ft
- Seaview Terrace Condominiumscore 46
Multifamily Housing · 39,888 sq ft
See also: most efficient in Seattle · biggest emitters
How does Strata Apts 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. Strata Apts's ENERGY STAR score of 70 compares with an average of 83 across the 1,652 that report a score; it scores higher than 18% of them and lower than 81%. Its site EUI of 33.3 kBtu/ft² is roughly in line with the average of 34.9 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.2 kgCO₂e/ft² is about 73% below the group average of 0.7 kgCO₂e/ft².
At 54,871 sq ft, it is about 37% below the average floor area of 86,468 sq ft for those buildings. It was built in 1987, 4 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 Strata Apts's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Strata Apts, covering report years 2015–2025. Its ENERGY STAR score was 70 in both 2015 and 2025. Site EUI moved from 29.2 kBtu/ft² (2015) to 33.3 kBtu/ft² (2025), an 14% increase. Reported emissions went from 8 tCO₂e to 8 tCO₂e over the same span (up 6%).
What does an ENERGY STAR score of 70 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 70 means the building performs better than about 70% of its national peers. BuildingCensus bands the score into report-card grades; 70 falls in band B — above median (70–84). It sits 5 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. Strata Apts's 33.3 kBtu/ft² across 54,871 sq ft works out to about 1.8 billion Btu (536 MWh-equivalent) in 2025. Its source EUI of 93.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 428,344 kWh of electricity for the year.
Which law requires Strata Apts to report its energy use?
Strata Apts 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:24722:2025). 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
- Olympic West Apts· 54,820 sq ft · score 57 (C)
- North Star Apartments· 54,791 sq ft · score 49 (D)
- Aurora House· 54,771 sq ft
- Union Gospel Mission Assn - Admin Building· 54,765 sq ft · score 1 (D)
- Rise On 67th Apartments· 54,721 sq ft · score 100 (A)
- Remi Apts· 54,721 sq ft · score 94 (A)
- 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 Strata Apts's energy grade?
Strata Apts scores 70 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2025 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Strata Apts use?
Its 2025 site energy-use intensity was 33.3 kBtu/ft² (93.1 kBtu/ft² source) across 54,871 sq ft, including 428,344 kWh of electricity.
What are Strata Apts's carbon emissions?
Strata Apts reported 8 tCO₂e of greenhouse-gas emissions (0.2 kgCO₂e/ft²) for 2025.
Where is Strata Apts?
Strata Apts is at 6312 CALIFORNIA AVE SW, in Seattle, Washington 98136. Its coordinates are 47.54635, -122.38691 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Strata Apts and when was it built?
Strata Apts has 54,871 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1987 as its year built. It is classed as multifamily housing.
Is Strata Apts 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, “Strata Apts, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/strata-apts-a62cbbfa (data as of October 2, 2026).