The Mill At First Hill
Multifamily Housing in Seattle, WA · 1000 8TH AVE · 98104
At a glance
The Mill At First Hill is a 333,244-square-foot multifamily housing building at 1000 8TH AVE in Seattle, Washington, built in 1949. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 48.5 kBtu/ft².
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 48.5 kBtu/ft² |
| Source EUI | 109.5 kBtu/ft² |
| GHG emissions | — |
| GHG intensity | — |
| Electricity | 2,138,862 kWh |
| Natural gas | 32,758 therms |
| Gross floor area | 333,244 sq ft |
| Source record | seattle:21370:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 48.5 kBtu/ft² | — | |
| 2024 | — | 42.6 kBtu/ft² | 44 tCO₂e | |
| 2023 | — | 38.3 kBtu/ft² | 49 tCO₂e | |
| 2022 | — | — | — | |
| 2021 | — | — | — | |
| 2020 | 50 | -37 | 46.6 kBtu/ft² | 281 tCO₂e |
| 2019 | 87 | +10 | 45.5 kBtu/ft² | 300 tCO₂e |
| 2018 | 77 | +6 | 48.3 kBtu/ft² | 292 tCO₂e |
| 2017 | 71 | ±0 | 48.5 kBtu/ft² | 298 tCO₂e |
| 2016 | 71 | +7 | 45.8 kBtu/ft² | 287 tCO₂e |
| 2015 | 64 | 48.5 kBtu/ft² | 309 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
- 1000 8TH AVE
- City
- Seattle
- State
- Washington
- ZIP
- 98104
- Coordinates
- 47.60821, -122.32840
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does The Mill At First Hill 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. Its site EUI of 48.5 kBtu/ft² is about 39% above the average of 34.9 kBtu/ft² — it uses more energy per square foot than the typical building in that group.
At 333,244 sq ft, it is about 285% above the average floor area of 86,468 sq ft for those buildings. It was built in 1949, 34 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 The Mill At First Hill's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for The Mill At First Hill, covering report years 2015–2025. Its ENERGY STAR score went from 64 in 2015 to 50 in 2020 (-14 points); its best year on file was 2019, at 87. Site EUI moved from 48.5 kBtu/ft² (2015) to 48.5 kBtu/ft² (2025), an 0% increase. Reported emissions went from 309 tCO₂e to 44 tCO₂e over the same span (down 86%).
What does a site EUI of 48.5 kBtu/ft² mean?
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. The Mill At First Hill's 48.5 kBtu/ft² across 333,244 sq ft works out to about 16.2 billion Btu (4,737 MWh-equivalent) in 2025. Its source EUI of 109.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,138,862 kWh of electricity and 32,758 therms of natural gas for the year.
Which law requires The Mill At First Hill to report its energy use?
The Mill At First Hill 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:21370:2025). 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
- Lake Washington Apartments· 332,900 sq ft · score 29 (D)
- M Street Apts, Retail, & Office· 332,781 sq ft
- Fifteen Twenty-One Second Avenue· 330,693 sq ft · score 31 (D)
- Fountain Court· 328,947 sq ft · score 95 (A)
- Equinox· 322,771 sq ft · score 98 (A)
- Nordheim Court (Uw Housing)· 321,333 sq ft · score 98 (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 The Mill At First Hill's energy grade?
The Mill At First Hill did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 48.5 kBtu/ft².
How much energy does The Mill At First Hill use?
Its 2025 site energy-use intensity was 48.5 kBtu/ft² (109.5 kBtu/ft² source) across 333,244 sq ft, including 2,138,862 kWh of electricity and 32,758 therms of natural gas.
What are The Mill At First Hill's carbon emissions?
No greenhouse-gas emissions figure was reported for 2025.
Where is The Mill At First Hill?
The Mill At First Hill is at 1000 8TH AVE, in Seattle, Washington 98104. Its coordinates are 47.60821, -122.32840 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is The Mill At First Hill and when was it built?
The Mill At First Hill has 333,244 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1949 as its year built. It is classed as multifamily housing.
Is The Mill At First Hill 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, “The Mill At First Hill, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/the-mill-at-first-hill-c6f61fcc (data as of October 2, 2026).