1150 Eastlake
Mixed Use Property in Seattle, WA · 1150 EASTLAKE AVE E · 98109
At a glance
1150 Eastlake is a 444,757-square-foot mixed use property building at 1150 EASTLAKE AVE E in Seattle, Washington, built in 2023. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 101.3 kBtu/ft² and 271 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 101.3 kBtu/ft² |
| Source EUI | 272.9 kBtu/ft² |
| GHG emissions | 271 tCO₂e |
| GHG intensity | 0.9 kgCO₂e/ft² |
| Electricity | 8,637,262 kWh |
| Natural gas | 18,887 therms |
| Gross floor area | 444,757 sq ft |
| Source record | seattle:51957:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 101.3 kBtu/ft² | 271 tCO₂e | |
| 2024 | — | 94.9 kBtu/ft² | 336 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
- 1150 EASTLAKE AVE E
- City
- Seattle
- State
- Washington
- ZIP
- 98109
- Coordinates
- 47.62998, -122.32776
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does 1150 Eastlake 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 101.3 kBtu/ft² is about 47% above the average of 68.7 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 0.9 kgCO₂e/ft² is about 37% below the group average of 1.4 kgCO₂e/ft².
At 444,757 sq ft, it is about 169% above the average floor area of 165,352 sq ft for those buildings. It was built in 2023, 55 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 1150 Eastlake's energy performance changed over time?
BuildingCensus holds 2 Seattle disclosures for 1150 Eastlake, covering report years 2024–2025. Site EUI moved from 94.9 kBtu/ft² (2024) to 101.3 kBtu/ft² (2025), an 7% increase. Reported emissions went from 336 tCO₂e to 271 tCO₂e over the same span (down 19%).
What does a site EUI of 101.3 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. 1150 Eastlake's 101.3 kBtu/ft² across 444,757 sq ft works out to about 45.1 billion Btu (13,204 MWh-equivalent) in 2025. Its source EUI of 272.9 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 8,637,262 kWh of electricity and 18,887 therms of natural gas for the year.
Which law requires 1150 Eastlake to report its energy use?
1150 Eastlake 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:51957:2025). 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
- UW MEDICINE-LK UNION PHASE II ITHS.ORG· 436,497 sq ft · EUI 174.1 kBtu/ft²
- Uw- Sandpoint Building # 5 (5a,5b,5c,5d)· 384,772 sq ft · EUI 45.5 kBtu/ft²
- First Hill Medical Pavilion (Hart First Hill Llc)· 383,914 sq ft · EUI 78.1 kBtu/ft²
- Metropolitan Park North Building· 380,312 sq ft · EUI 23.3 kBtu/ft²
- Boeing South Park Campus Report· 334,368 sq ft · EUI 134.2 kBtu/ft²
- Fred Meyer Greenwood· 314,958 sq ft · score 86 (A)
- 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 1150 Eastlake's energy grade?
1150 Eastlake did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 101.3 kBtu/ft².
How much energy does 1150 Eastlake use?
Its 2025 site energy-use intensity was 101.3 kBtu/ft² (272.9 kBtu/ft² source) across 444,757 sq ft, including 8,637,262 kWh of electricity and 18,887 therms of natural gas.
What are 1150 Eastlake's carbon emissions?
1150 Eastlake reported 271 tCO₂e of greenhouse-gas emissions (0.9 kgCO₂e/ft²) for 2025.
Where is 1150 Eastlake?
1150 Eastlake is at 1150 EASTLAKE AVE E, in Seattle, Washington 98109. Its coordinates are 47.62998, -122.32776 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 1150 Eastlake and when was it built?
1150 Eastlake has 444,757 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 2023 as its year built. It is classed as mixed use property.
Is 1150 Eastlake 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, “1150 Eastlake, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/1150-eastlake-e8dbc31b (data as of October 2, 2026).