Barton Court Apts
Multifamily Housing in Seattle, WA · 9021 35TH AVE SW · 98126
At a glance
Barton Court Apts is a 31,499-square-foot multifamily housing building at 9021 35TH AVE SW in Seattle, Washington, built in 1988. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 100 out of 100 (grade A), a site energy-use intensity of 2.7 kBtu/ft² and 0 tCO₂e of greenhouse-gas emissions. That score is higher than 88% 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 | 100 (band A) |
| Site EUI | 2.7 kBtu/ft² |
| Source EUI | 7.5 kBtu/ft² |
| GHG emissions | 0 tCO₂e |
| GHG intensity | 0.0 kgCO₂e/ft² |
| Electricity | 19,864 kWh |
| Gross floor area | 31,499 sq ft |
| Source record | seattle:21762:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 100 | ±0 | 2.7 kBtu/ft² | 0 tCO₂e |
| 2024 | 100 | ±0 | 3.5 kBtu/ft² | 1 tCO₂e |
| 2023 | 100 | ±0 | 3.1 kBtu/ft² | 1 tCO₂e |
| 2022 | 100 | +12 | 17.0 kBtu/ft² | 3 tCO₂e |
| 2021 | 88 | +6 | 30.0 kBtu/ft² | 4 tCO₂e |
| 2020 | 82 | -8 | 30.8 kBtu/ft² | 5 tCO₂e |
| 2019 | 90 | -4 | 28.2 kBtu/ft² | 4 tCO₂e |
| 2018 | 94 | -3 | 26.4 kBtu/ft² | 4 tCO₂e |
| 2017 | 97 | +7 | 24.5 kBtu/ft² | 4 tCO₂e |
| 2016 | 90 | +10 | 26.6 kBtu/ft² | 4 tCO₂e |
| 2015 | 80 | 27.0 kBtu/ft² | 4 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
- 9021 35TH AVE SW
- City
- Seattle
- State
- Washington
- ZIP
- 98126
- Coordinates
- 47.52225, -122.37718
Within ~1 km
Nearby benchmarked buildings
K-12 School · 46,797 sq ft
- Olympic Park Condominiumscore 87
Multifamily Housing · 42,084 sq ft
- Southwest Community Centerscore —
Other - Recreation · 27,227 sq ft
- Summit Atlas Charter Schoolscore 87
K-12 School · 23,772 sq ft
See also: most efficient in Seattle · biggest emitters
How does Barton Court 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. Barton Court Apts's ENERGY STAR score of 100 compares with an average of 83 across the 1,652 that report a score; it scores higher than 88% of them. Its site EUI of 2.7 kBtu/ft² is about 92% below 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 0.0 kgCO₂e/ft² is about 97% below the group average of 0.7 kgCO₂e/ft².
At 31,499 sq ft, it is about 64% below the average floor area of 86,468 sq ft for those buildings. It was built in 1988, 5 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 Barton Court Apts's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Barton Court Apts, covering report years 2015–2025. Its ENERGY STAR score went from 80 in 2015 to 100 in 2025 (+20 points); its best year on file was 2022, at 100. Site EUI moved from 27.0 kBtu/ft² (2015) to 2.7 kBtu/ft² (2025), a 90% decrease. Reported emissions went from 4 tCO₂e to 0 tCO₂e over the same span (down 90%).
What does an ENERGY STAR score of 100 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: 100 is the top of the scale. BuildingCensus bands the score into report-card grades; 100 falls in band A — high performer (85–100). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. 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. Barton Court Apts's 2.7 kBtu/ft² across 31,499 sq ft works out to about 0.1 billion Btu (25 MWh-equivalent) in 2025. Its source EUI of 7.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 19,864 kWh of electricity for the year.
Which law requires Barton Court Apts to report its energy use?
Barton Court 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:21762:2025). 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
- Oak Ridge Condominium· 31,488 sq ft · score 99 (A)
- Bolyston Court Apts· 31,457 sq ft · score 75 (B)
- Sound Crest Apts-24 Units· 31,457 sq ft · score 99 (A)
- Parkway 2 Apartments· 31,379 sq ft · score 87 (A)
- Shea Apts Building 2· 31,361 sq ft · score 48 (D)
- B Division No. 02 Condominium· 31,334 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 Barton Court Apts's energy grade?
Barton Court Apts scores 100 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 Barton Court Apts use?
Its 2025 site energy-use intensity was 2.7 kBtu/ft² (7.5 kBtu/ft² source) across 31,499 sq ft, including 19,864 kWh of electricity.
What are Barton Court Apts's carbon emissions?
Barton Court Apts reported 0 tCO₂e of greenhouse-gas emissions (0.0 kgCO₂e/ft²) for 2025.
Where is Barton Court Apts?
Barton Court Apts is at 9021 35TH AVE SW, in Seattle, Washington 98126. Its coordinates are 47.52225, -122.37718 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Barton Court Apts and when was it built?
Barton Court Apts has 31,499 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1988 as its year built. It is classed as multifamily housing.
Is Barton Court 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).
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.
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, “Barton Court Apts, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/barton-court-apts-4833ac69 (data as of October 2, 2026).