645 Elliott - North Building
Mixed Use Property in Seattle, WA · 645 ELLIOTT AVE W · 98119
At a glance
645 Elliott - North Building is a 242,686-square-foot mixed use property building at 645 ELLIOTT AVE W in Seattle, Washington, built in 2008. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 71.3 kBtu/ft² and 59 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 71.3 kBtu/ft² |
| Source EUI | 199.6 kBtu/ft² |
| GHG emissions | 59 tCO₂e |
| GHG intensity | 0.4 kgCO₂e/ft² |
| Electricity | 2,976,970 kWh |
| Gross floor area | 242,686 sq ft |
| Source record | seattle:807:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 71.3 kBtu/ft² | 59 tCO₂e | |
| 2024 | 59 | -8 | 68.0 kBtu/ft² | 56 tCO₂e |
| 2023 | 67 | -14 | 54.9 kBtu/ft² | 50 tCO₂e |
| 2022 | 81 | +1 | 45.2 kBtu/ft² | 41 tCO₂e |
| 2021 | 80 | +3 | 45.3 kBtu/ft² | 41 tCO₂e |
| 2020 | 77 | +5 | 47.4 kBtu/ft² | 43 tCO₂e |
| 2019 | 72 | -3 | 61.0 kBtu/ft² | 53 tCO₂e |
| 2018 | 75 | +11 | 64.2 kBtu/ft² | 54 tCO₂e |
| 2017 | 64 | -11 | 73.9 kBtu/ft² | 62 tCO₂e |
| 2016 | 75 | +3 | 67.6 kBtu/ft² | 56 tCO₂e |
| 2015 | 72 | 61.8 kBtu/ft² | 53 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
- 645 ELLIOTT AVE W
- City
- Seattle
- State
- Washington
- ZIP
- 98119
- Coordinates
- 47.62520, -122.36737
Within ~1 km
Nearby benchmarked buildings
- Expedia - Campusscore 86
Mixed Use Property · 1,552,140 sq ft
- 635 ELLIOTT - SOUTH BUILDINGscore 65
Office · 291,176 sq ft
- Avalon Queen Annescore 98
Multifamily Housing · 290,520 sq ft
- Elliott Bay Office Parkscore 97
Office · 275,734 sq ft
- 3rd And Harrisonscore —
Office · 240,700 sq ft
Office · 208,210 sq ft
See also: most efficient in Seattle · biggest emitters
How does 645 Elliott - North Building compare with other mixed use property buildings in Seattle?
The latest disclosures cover 157 mixed use property buildings in Seattle, out of 3,871 buildings citywide. Its site EUI of 71.3 kBtu/ft² is roughly in line with the average of 68.7 kBtu/ft². Its emissions intensity of 0.4 kgCO₂e/ft² is about 71% below the group average of 1.4 kgCO₂e/ft².
At 242,686 sq ft, it is about 47% above the average floor area of 165,352 sq ft for those buildings. It was built in 2008, 40 years later than the group's average year built (1968). Across all 24 jurisdictions BuildingCensus covers, the 1,212 mixed use property buildings average an ENERGY STAR score of 69 and a site EUI of 79.8 kBtu/ft².
How has 645 Elliott - North Building's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for 645 Elliott - North Building, covering report years 2015–2025. Its ENERGY STAR score went from 72 in 2015 to 59 in 2024 (-13 points); its best year on file was 2022, at 81. Site EUI moved from 61.8 kBtu/ft² (2015) to 71.3 kBtu/ft² (2025), an 15% increase. Reported emissions went from 53 tCO₂e to 59 tCO₂e over the same span (up 10%).
What does a site EUI of 71.3 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. 645 Elliott - North Building's 71.3 kBtu/ft² across 242,686 sq ft works out to about 17.3 billion Btu (5,071 MWh-equivalent) in 2025. Its source EUI of 199.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,976,970 kWh of electricity for the year.
Which law requires 645 Elliott - North Building to report its energy use?
645 Elliott - North Building 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:807:2025). 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 mixed use property buildings in Seattle
- 1920 Queen Anne Ave N, Seattle, WA 98109, USA· 233,528 sq ft · EUI 20.4 kBtu/ft²
- Epicenter Apts· 225,145 sq ft · EUI 46.7 kBtu/ft²
- Port Of Seattle Bell Harbor Complex & Conference - Campus· 217,088 sq ft · EUI 158.2 kBtu/ft²
- 4225 Roosevelt Bldg- U Of W Med. Center· 196,749 sq ft · EUI 156.1 kBtu/ft²
- Sixth & Wall Building (521 Wall St)· 192,630 sq ft · EUI 35.0 kBtu/ft²
- Elliott Park Building· 190,000 sq ft · EUI 157.2 kBtu/ft²
- Mixed Use Property buildings in Seattle· 157 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 645 Elliott - North Building's energy grade?
645 Elliott - North Building did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 71.3 kBtu/ft².
How much energy does 645 Elliott - North Building use?
Its 2025 site energy-use intensity was 71.3 kBtu/ft² (199.6 kBtu/ft² source) across 242,686 sq ft, including 2,976,970 kWh of electricity.
What are 645 Elliott - North Building's carbon emissions?
645 Elliott - North Building reported 59 tCO₂e of greenhouse-gas emissions (0.4 kgCO₂e/ft²) for 2025.
Where is 645 Elliott - North Building?
645 Elliott - North Building is at 645 ELLIOTT AVE W, in Seattle, Washington 98119. Its coordinates are 47.62520, -122.36737 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 645 Elliott - North Building and when was it built?
645 Elliott - North Building has 242,686 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 2008 as its year built. It is classed as mixed use property.
Is 645 Elliott - North Building 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, “645 Elliott - North Building, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/645-elliott-north-building-b0ed043e (data as of October 2, 2026).