Frederic Ozanam House/ Westlake Ii
Multifamily Housing in Seattle, WA · 801 9TH AVE · 98104
At a glance
Frederic Ozanam House/ Westlake Ii is a 32,489-square-foot multifamily housing building at 801 9TH AVE in Seattle, Washington, built in 2009. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 65 out of 100 (grade C), a site energy-use intensity of 61.0 kBtu/ft² and 7 tCO₂e of greenhouse-gas emissions. That score is higher than 14% 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 | 65 (band C) |
| Site EUI | 61.0 kBtu/ft² |
| Source EUI | 170.9 kBtu/ft² |
| GHG emissions | 7 tCO₂e |
| GHG intensity | 0.3 kgCO₂e/ft² |
| Electricity | 363,960 kWh |
| Gross floor area | 32,489 sq ft |
| Source record | seattle:23290:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 65 | -7 | 61.0 kBtu/ft² | 7 tCO₂e |
| 2024 | 72 | -9 | 58.0 kBtu/ft² | 7 tCO₂e |
| 2023 | 81 | +17 | 54.5 kBtu/ft² | 6 tCO₂e |
| 2022 | 64 | +5 | 62.9 kBtu/ft² | 7 tCO₂e |
| 2021 | 59 | +21 | 64.4 kBtu/ft² | 8 tCO₂e |
| 2020 | 38 | 69.2 kBtu/ft² | 8 tCO₂e | |
| 2019 | — | — | — | |
| 2018 | 20 | -1 | 96.9 kBtu/ft² | 38 tCO₂e |
| 2017 | 21 | +3 | 103.7 kBtu/ft² | 48 tCO₂e |
| 2016 | 18 | -2 | 99.5 kBtu/ft² | 47 tCO₂e |
| 2015 | 20 | 98.1 kBtu/ft² | 46 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
- 801 9TH AVE
- City
- Seattle
- State
- Washington
- ZIP
- 98104
- Coordinates
- 47.60707, -122.32651
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does Frederic Ozanam House/ Westlake Ii 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. Frederic Ozanam House/ Westlake Ii's ENERGY STAR score of 65 compares with an average of 83 across the 1,652 that report a score; it scores higher than 14% of them and lower than 85%. Its site EUI of 61.0 kBtu/ft² is about 75% above the average of 34.9 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 0.3 kgCO₂e/ft² is about half of the group average of 0.7 kgCO₂e/ft².
At 32,489 sq ft, it is about 62% below the average floor area of 86,468 sq ft for those buildings. It was built in 2009, 26 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 Frederic Ozanam House/ Westlake Ii's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Frederic Ozanam House/ Westlake Ii, covering report years 2015–2025. Its ENERGY STAR score went from 20 in 2015 to 65 in 2025 (+45 points); its best year on file was 2023, at 81. Site EUI moved from 98.1 kBtu/ft² (2015) to 61.0 kBtu/ft² (2025), a 38% decrease. Reported emissions went from 46 tCO₂e to 7 tCO₂e over the same span (down 84%).
What does an ENERGY STAR score of 65 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 65 means the building performs better than about 65% of its national peers. BuildingCensus bands the score into report-card grades; 65 falls in band C — below median (55–69). It sits 10 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. Frederic Ozanam House/ Westlake Ii's 61.0 kBtu/ft² across 32,489 sq ft works out to about 2 billion Btu (581 MWh-equivalent) in 2025. Its source EUI of 170.9 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 363,960 kWh of electricity for the year.
Which law requires Frederic Ozanam House/ Westlake Ii to report its energy use?
Frederic Ozanam House/ Westlake Ii 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:23290:2025). 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
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- Park Lane Place Condominium· 32,430 sq ft · score 65 (C)
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- Multifamily Housing buildings in Seattle· 1,971 benchmarked
- All Seattle benchmarked buildings· Seattle Energy Benchmarking Ordinance (SMC 22.920)
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- Biggest emitters in Seattle
Frequently asked questions
What is Frederic Ozanam House/ Westlake Ii's energy grade?
Frederic Ozanam House/ Westlake Ii scores 65 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2025 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Frederic Ozanam House/ Westlake Ii use?
Its 2025 site energy-use intensity was 61.0 kBtu/ft² (170.9 kBtu/ft² source) across 32,489 sq ft, including 363,960 kWh of electricity.
What are Frederic Ozanam House/ Westlake Ii's carbon emissions?
Frederic Ozanam House/ Westlake Ii reported 7 tCO₂e of greenhouse-gas emissions (0.3 kgCO₂e/ft²) for 2025.
Where is Frederic Ozanam House/ Westlake Ii?
Frederic Ozanam House/ Westlake Ii is at 801 9TH AVE, in Seattle, Washington 98104. Its coordinates are 47.60707, -122.32651 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Frederic Ozanam House/ Westlake Ii and when was it built?
Frederic Ozanam House/ Westlake Ii has 32,489 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 2009 as its year built. It is classed as multifamily housing.
Is Frederic Ozanam House/ Westlake Ii 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, “Frederic Ozanam House/ Westlake Ii, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/frederic-ozanam-house-westlake-ii-f686ae51 (data as of October 2, 2026).