Hillree Manor
Multifamily Housing in Seattle, WA · 401 E MERCER ST · 98102
At a glance
Hillree Manor is a 27,910-square-foot multifamily housing building at 401 E MERCER ST in Seattle, Washington, built in 1959. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 81 out of 100 (grade B), a site energy-use intensity of 34.4 kBtu/ft² and 5 tCO₂e of greenhouse-gas emissions. That score is higher than 31% 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 | 81 (band B) |
| Site EUI | 34.4 kBtu/ft² |
| Source EUI | 96.4 kBtu/ft² |
| GHG emissions | 5 tCO₂e |
| GHG intensity | 0.2 kgCO₂e/ft² |
| Electricity | 256,814 kWh |
| Gross floor area | 27,910 sq ft |
| Source record | seattle:24688:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 81 | -3 | 34.4 kBtu/ft² | 5 tCO₂e |
| 2024 | 84 | +2 | 33.0 kBtu/ft² | 5 tCO₂e |
| 2023 | 82 | ±0 | 34.3 kBtu/ft² | 5 tCO₂e |
| 2022 | 82 | +5 | 35.1 kBtu/ft² | 5 tCO₂e |
| 2021 | 77 | -3 | 36.3 kBtu/ft² | 5 tCO₂e |
| 2020 | 80 | -3 | 34.3 kBtu/ft² | 5 tCO₂e |
| 2019 | 83 | +1 | 33.6 kBtu/ft² | 5 tCO₂e |
| 2018 | 82 | ±0 | 33.6 kBtu/ft² | 5 tCO₂e |
| 2017 | 82 | +9 | 34.7 kBtu/ft² | 5 tCO₂e |
| 2016 | 73 | +31 | 33.9 kBtu/ft² | 5 tCO₂e |
| 2015 | 42 | 33.1 kBtu/ft² | 5 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
- 401 E MERCER ST
- City
- Seattle
- State
- Washington
- ZIP
- 98102
- Coordinates
- 47.62409, -122.32643
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does Hillree 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. Hillree Manor's ENERGY STAR score of 81 compares with an average of 83 across the 1,652 that report a score; it scores higher than 31% of them and lower than 68%. Its site EUI of 34.4 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 71% below the group average of 0.7 kgCO₂e/ft².
At 27,910 sq ft, it is about 68% below the average floor area of 86,468 sq ft for those buildings. It was built in 1959, 24 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 Hillree Manor's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Hillree Manor, covering report years 2015–2025. Its ENERGY STAR score went from 42 in 2015 to 81 in 2025 (+39 points); its best year on file was 2024, at 84. Site EUI moved from 33.1 kBtu/ft² (2015) to 34.4 kBtu/ft² (2025), an 4% increase. Reported emissions went from 5 tCO₂e to 5 tCO₂e over the same span (up 2%).
What does an ENERGY STAR score of 81 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 81 means the building performs better than about 81% of its national peers. BuildingCensus bands the score into report-card grades; 81 falls in band B — above median (70–84). 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. Hillree Manor's 34.4 kBtu/ft² across 27,910 sq ft works out to about 1 billion Btu (281 MWh-equivalent) in 2025. Its source EUI of 96.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 256,814 kWh of electricity for the year.
Which law requires Hillree Manor to report its energy use?
Hillree 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:24688:2025). 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
- Midtown· 27,878 sq ft · score 89 (A)
- Wedgewood Estates (Bldg. B/ Bldg #10)· 27,853 sq ft · score 57 (C)
- Viewmont Apt· 27,852 sq ft · score 87 (A)
- Penn Hall Apts (Hud Qualified)· 27,840 sq ft · score 77 (B)
- Belmont Apts· 27,792 sq ft · score 83 (B)
- Oswego Place Apts· 27,770 sq ft · score 99 (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 Hillree Manor's energy grade?
Hillree Manor scores 81 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 Hillree Manor use?
Its 2025 site energy-use intensity was 34.4 kBtu/ft² (96.4 kBtu/ft² source) across 27,910 sq ft, including 256,814 kWh of electricity.
What are Hillree Manor's carbon emissions?
Hillree Manor reported 5 tCO₂e of greenhouse-gas emissions (0.2 kgCO₂e/ft²) for 2025.
Where is Hillree Manor?
Hillree Manor is at 401 E MERCER ST, in Seattle, Washington 98102. Its coordinates are 47.62409, -122.32643 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Hillree Manor and when was it built?
Hillree Manor has 27,910 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1959 as its year built. It is classed as multifamily housing.
Is Hillree 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, “Hillree Manor, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/hillree-manor-bff12e87 (data as of October 2, 2026).