Lake Union Tower
Mixed Use Property in Seattle, WA · 766 GARFIELD ST · 98109
At a glance
Lake Union Tower is a 33,978-square-foot mixed use property building at 766 GARFIELD ST in Seattle, Washington, built in 1995.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | — |
| Source EUI | — |
| GHG emissions | — |
| GHG intensity | — |
| Electricity | 193,221 kWh |
| Gross floor area | 33,978 sq ft |
| Source record | seattle:26140:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | — | — | |
| 2024 | 96 | ±0 | 36.5 kBtu/ft² | 6 tCO₂e |
| 2023 | 96 | ±0 | 36.8 kBtu/ft² | 6 tCO₂e |
| 2022 | 96 | +1 | 38.1 kBtu/ft² | 7 tCO₂e |
| 2021 | 95 | -2 | 38.6 kBtu/ft² | 7 tCO₂e |
| 2020 | 97 | +2 | 37.3 kBtu/ft² | 8 tCO₂e |
| 2019 | 95 | -2 | 39.1 kBtu/ft² | 8 tCO₂e |
| 2018 | 97 | 37.0 kBtu/ft² | 8 tCO₂e | |
| 2017 | — | 43.0 kBtu/ft² | 10 tCO₂e | |
| 2016 | — | 40.2 kBtu/ft² | 9 tCO₂e | |
| 2015 | — | 39.7 kBtu/ft² | 7 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
- 766 GARFIELD ST
- City
- Seattle
- State
- Washington
- ZIP
- 98109
- Coordinates
- 47.63315, -122.34147
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does Lake Union Tower 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.
At 33,978 sq ft, it is about 79% below the average floor area of 165,352 sq ft for those buildings. It was built in 1995, 27 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 Lake Union Tower's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Lake Union Tower, covering report years 2015–2025. Its ENERGY STAR score went from 97 in 2018 to 96 in 2024 (-1 points); its best year on file was 2018, at 97. Site EUI moved from 39.7 kBtu/ft² (2015) to 36.5 kBtu/ft² (2024), a 8% decrease. Reported emissions went from 7 tCO₂e to 6 tCO₂e over the same span (down 19%).
Which law requires Lake Union Tower to report its energy use?
Lake Union Tower 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:26140:2025). 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
- Office Retail -Canal Building· 33,840 sq ft · EUI 36.1 kBtu/ft²
- 4555 Roosevelt Way Ne· 32,928 sq ft · EUI 103.2 kBtu/ft²
- Youthcare· 32,282 sq ft · EUI 25.1 kBtu/ft²
- DISPLAY COSTUME- DEMOLISHED· 32,009 sq ft · EUI 22.7 kBtu/ft²
- Rudd Company· 31,140 sq ft · EUI 32.4 kBtu/ft²
- Loft Workshops· 30,948 sq ft · EUI 36.0 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 Lake Union Tower's energy grade?
Lake Union Tower did not report an ENERGY STAR score in its 2025 disclosure.
How much energy does Lake Union Tower use?
No energy-use intensity was reported for 2025.
What are Lake Union Tower's carbon emissions?
No greenhouse-gas emissions figure was reported for 2025.
Where is Lake Union Tower?
Lake Union Tower is at 766 GARFIELD ST, in Seattle, Washington 98109. Its coordinates are 47.63315, -122.34147 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Lake Union Tower and when was it built?
Lake Union Tower has 33,978 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1995 as its year built. It is classed as mixed use property.
Is Lake Union Tower 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, “Lake Union Tower, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/lake-union-tower-88e1b9f2 (data as of October 2, 2026).