Cottonwood Apt
Multifamily Housing in Seattle, WA · 11002 35TH AVE NE · 98125
At a glance
Cottonwood Apt is a 21,712-square-foot multifamily housing building at 11002 35TH AVE NE in Seattle, Washington, built in 1978. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 88 out of 100 (grade A), a site energy-use intensity of 28.3 kBtu/ft² and 3 tCO₂e of greenhouse-gas emissions. That score is higher than 43% 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 | 88 (band A) |
| Site EUI | 28.3 kBtu/ft² |
| Source EUI | 79.2 kBtu/ft² |
| GHG emissions | 3 tCO₂e |
| GHG intensity | 0.2 kgCO₂e/ft² |
| Electricity | 180,080 kWh |
| Gross floor area | 21,712 sq ft |
| Source record | seattle:26325:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 88 | +3 | 28.3 kBtu/ft² | 3 tCO₂e |
| 2024 | 85 | +13 | 29.2 kBtu/ft² | 4 tCO₂e |
| 2023 | 72 | -7 | 33.3 kBtu/ft² | 4 tCO₂e |
| 2022 | 79 | -2 | 31.9 kBtu/ft² | 4 tCO₂e |
| 2021 | 81 | +2 | 31.0 kBtu/ft² | 4 tCO₂e |
| 2020 | 79 | +2 | 30.6 kBtu/ft² | 4 tCO₂e |
| 2019 | 77 | -4 | 31.4 kBtu/ft² | 4 tCO₂e |
| 2018 | 81 | 30.1 kBtu/ft² | 4 tCO₂e | |
| 2017 | — | 32.8 kBtu/ft² | 4 tCO₂e | |
| 2016 | — | 31.6 kBtu/ft² | 4 tCO₂e | |
| 2015 | — | 31.7 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.
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Location
- Address
- 11002 35TH AVE NE
- City
- Seattle
- State
- Washington
- ZIP
- 98125
- Coordinates
- 47.70857, -122.29048
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does Cottonwood Apt 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. Cottonwood Apt's ENERGY STAR score of 88 compares with an average of 83 across the 1,652 that report a score; it scores higher than 43% of them and lower than 55%. Its site EUI of 28.3 kBtu/ft² is about 19% 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 0.2 kgCO₂e/ft² is about 77% below the group average of 0.7 kgCO₂e/ft².
At 21,712 sq ft, it is about 75% below the average floor area of 86,468 sq ft for those buildings. It was built in 1978, 5 years earlier 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 Cottonwood Apt's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Cottonwood Apt, covering report years 2015–2025. Its ENERGY STAR score went from 81 in 2018 to 88 in 2025 (+7 points). Site EUI moved from 31.7 kBtu/ft² (2015) to 28.3 kBtu/ft² (2025), a 11% decrease. Reported emissions went from 4 tCO₂e to 3 tCO₂e over the same span (down 13%).
What does an ENERGY STAR score of 88 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 88 means the building performs better than about 88% of its national peers. BuildingCensus bands the score into report-card grades; 88 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. Cottonwood Apt's 28.3 kBtu/ft² across 21,712 sq ft works out to about 0.6 billion Btu (180 MWh-equivalent) in 2025. Its source EUI of 79.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 180,080 kWh of electricity for the year.
Which law requires Cottonwood Apt to report its energy use?
Cottonwood Apt 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:26325:2025). 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
- J&E Apts· 21,708 sq ft
- Washington Arms Condominium· 21,672 sq ft · EUI 60.7 kBtu/ft²
- Siena Del Lago Condominium· 21,643 sq ft · EUI 51.7 kBtu/ft²
- Valley Commons· 21,640 sq ft · score 91 (A)
- Tara Apts· 21,608 sq ft · score 90 (A)
- Towne Vue Manor· 21,602 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 Cottonwood Apt's energy grade?
Cottonwood Apt scores 88 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 Cottonwood Apt use?
Its 2025 site energy-use intensity was 28.3 kBtu/ft² (79.2 kBtu/ft² source) across 21,712 sq ft, including 180,080 kWh of electricity.
What are Cottonwood Apt's carbon emissions?
Cottonwood Apt reported 3 tCO₂e of greenhouse-gas emissions (0.2 kgCO₂e/ft²) for 2025.
Where is Cottonwood Apt?
Cottonwood Apt is at 11002 35TH AVE NE, in Seattle, Washington 98125. Its coordinates are 47.70857, -122.29048 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Cottonwood Apt and when was it built?
Cottonwood Apt has 21,712 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1978 as its year built. It is classed as multifamily housing.
Is Cottonwood Apt 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, “Cottonwood Apt, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/cottonwood-apt-5599f49a (data as of October 2, 2026).