Stewart Manor
Multifamily Housing in Seattle, WA · 6339 34TH AVE SW · 98126
At a glance
Stewart Manor is a 49,510-square-foot multifamily housing building at 6339 34TH AVE SW in Seattle, Washington, built in 1968. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 33 out of 100 (grade D), a site energy-use intensity of 55.4 kBtu/ft² and 32 tCO₂e of greenhouse-gas emissions. That score is higher than 4% 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 | 33 (band D) |
| Site EUI | 55.4 kBtu/ft² |
| Source EUI | 141.3 kBtu/ft² |
| GHG emissions | 32 tCO₂e |
| GHG intensity | 0.7 kgCO₂e/ft² |
| Electricity | 662,609 kWh |
| Natural gas | 3,747 therms |
| Gross floor area | 49,510 sq ft |
| Source record | seattle:23677:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 33 | -1 | 55.4 kBtu/ft² | 32 tCO₂e |
| 2024 | 34 | +4 | 54.8 kBtu/ft² | 33 tCO₂e |
| 2023 | 30 | +7 | 55.3 kBtu/ft² | 34 tCO₂e |
| 2022 | 23 | +2 | 60.2 kBtu/ft² | 38 tCO₂e |
| 2021 | 21 | -12 | 60.6 kBtu/ft² | 41 tCO₂e |
| 2020 | 33 | +5 | 54.0 kBtu/ft² | 37 tCO₂e |
| 2019 | 28 | -8 | 56.4 kBtu/ft² | 39 tCO₂e |
| 2018 | 36 | +10 | 53.3 kBtu/ft² | 38 tCO₂e |
| 2017 | 26 | +5 | 59.1 kBtu/ft² | 41 tCO₂e |
| 2016 | 21 | +18 | 55.9 kBtu/ft² | 42 tCO₂e |
| 2015 | 3 | 54.4 kBtu/ft² | 41 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
- 6339 34TH AVE SW
- City
- Seattle
- State
- Washington
- ZIP
- 98126
- Coordinates
- 47.54522, -122.37536
Within ~1 km
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How does Stewart Manor 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. Stewart Manor's ENERGY STAR score of 33 compares with an average of 83 across the 1,652 that report a score; it scores higher than 4% of them and lower than 96%. Its site EUI of 55.4 kBtu/ft² is about 59% 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 0.7 kgCO₂e/ft² is roughly in line with the group average of 0.7 kgCO₂e/ft².
At 49,510 sq ft, it is about 43% below the average floor area of 86,468 sq ft for those buildings. It was built in 1968, 15 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 Stewart Manor's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Stewart Manor, covering report years 2015–2025. Its ENERGY STAR score went from 3 in 2015 to 33 in 2025 (+30 points); its best year on file was 2018, at 36. Site EUI moved from 54.4 kBtu/ft² (2015) to 55.4 kBtu/ft² (2025), an 2% increase. Reported emissions went from 41 tCO₂e to 32 tCO₂e over the same span (down 20%).
What does an ENERGY STAR score of 33 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 33 means the building performs better than about 33% of its national peers. BuildingCensus bands the score into report-card grades; 33 falls in band D — lowest band (1–54). It sits 42 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. Stewart Manor's 55.4 kBtu/ft² across 49,510 sq ft works out to about 2.7 billion Btu (804 MWh-equivalent) in 2025. Its source EUI of 141.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 662,609 kWh of electricity and 3,747 therms of natural gas for the year.
Which law requires Stewart Manor to report its energy use?
Stewart Manor 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:23677:2025). 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
- Roxbury Village· 49,501 sq ft · score 70 (B)
- Twenty-Third And Main Condominium· 49,310 sq ft · score 88 (A)
- Highlands North The Condominium· 49,291 sq ft · score 98 (A)
- Harvard Court· 49,256 sq ft · score 91 (A)
- Capitol Hill Townhomes· 49,106 sq ft · score 58 (C)
- Hollywood Lofts· 49,062 sq ft · score 89 (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 Stewart Manor's energy grade?
Stewart Manor scores 33 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2025 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Stewart Manor use?
Its 2025 site energy-use intensity was 55.4 kBtu/ft² (141.3 kBtu/ft² source) across 49,510 sq ft, including 662,609 kWh of electricity and 3,747 therms of natural gas.
What are Stewart Manor's carbon emissions?
Stewart Manor reported 32 tCO₂e of greenhouse-gas emissions (0.7 kgCO₂e/ft²) for 2025.
Where is Stewart Manor?
Stewart Manor is at 6339 34TH AVE SW, in Seattle, Washington 98126. Its coordinates are 47.54522, -122.37536 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Stewart Manor and when was it built?
Stewart Manor has 49,510 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1968 as its year built. It is classed as multifamily housing.
Is Stewart Manor 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, “Stewart Manor, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/stewart-manor-9d510d50 (data as of October 2, 2026).