1251 1st Ave S (Formerly Great Floors)
Non-Refrigerated Warehouse in Seattle, WA · 1251 1ST AVE S · 98134
At a glance
1251 1st Ave S (Formerly Great Floors) is a 40,967-square-foot non-refrigerated warehouse at 1251 1ST AVE S in Seattle, Washington, built in 1938. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 13.9 kBtu/ft² and 4 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 13.9 kBtu/ft² |
| Source EUI | 38.4 kBtu/ft² |
| GHG emissions | 4 tCO₂e |
| GHG intensity | 0.1 kgCO₂e/ft² |
| Electricity | 163,446 kWh |
| Natural gas | 109 therms |
| Gross floor area | 40,967 sq ft |
| Source record | seattle:24714:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 13.9 kBtu/ft² | 4 tCO₂e | |
| 2024 | — | 15.2 kBtu/ft² | 4 tCO₂e | |
| 2023 | — | 72.3 kBtu/ft² | 127 tCO₂e | |
| 2022 | — | — | 4 tCO₂e | |
| 2021 | — | — | — | |
| 2020 | 35 | +6 | 59.2 kBtu/ft² | 95 tCO₂e |
| 2019 | 29 | -8 | 66.3 kBtu/ft² | 108 tCO₂e |
| 2018 | 37 | 54.3 kBtu/ft² | 82 tCO₂e | |
| 2017 | — | 40.8 kBtu/ft² | 52 tCO₂e | |
| 2016 | — | 60.6 kBtu/ft² | 96 tCO₂e | |
| 2015 | — | 50.0 kBtu/ft² | 71 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
- 1251 1ST AVE S
- City
- Seattle
- State
- Washington
- ZIP
- 98134
- Coordinates
- 47.59081, -122.33487
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does 1251 1st Ave S (Formerly Great Floors) compare with other non-refrigerated warehouse buildings in Seattle?
The latest disclosures cover 164 non-refrigerated warehouse buildings in Seattle, out of 3,871 buildings citywide. Its site EUI of 13.9 kBtu/ft² is about half of the average of 30.5 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.1 kgCO₂e/ft² is about 90% below the group average of 0.9 kgCO₂e/ft².
At 40,967 sq ft, it is about 30% below the average floor area of 58,727 sq ft for those buildings. It was built in 1938, 22 years earlier than the group's average year built (1960). Across all 24 jurisdictions BuildingCensus covers, the 4,723 non-refrigerated warehouse buildings average an ENERGY STAR score of 66 and a site EUI of 26.0 kBtu/ft².
How has 1251 1st Ave S (Formerly Great Floors)'s energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for 1251 1st Ave S (Formerly Great Floors), covering report years 2015–2025. Its ENERGY STAR score went from 37 in 2018 to 35 in 2020 (-2 points); its best year on file was 2018, at 37. Site EUI moved from 50.0 kBtu/ft² (2015) to 13.9 kBtu/ft² (2025), a 72% decrease. Reported emissions went from 71 tCO₂e to 4 tCO₂e over the same span (down 95%).
What does a site EUI of 13.9 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. 1251 1st Ave S (Formerly Great Floors)'s 13.9 kBtu/ft² across 40,967 sq ft works out to about 0.6 billion Btu (167 MWh-equivalent) in 2025. Its source EUI of 38.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 163,446 kWh of electricity and 109 therms of natural gas for the year.
Which law requires 1251 1st Ave S (Formerly Great Floors) to report its energy use?
1251 1st Ave S (Formerly Great Floors) 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:24714:2025). 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 non-refrigerated warehouse buildings in Seattle
- Budget Sales· 40,800 sq ft · score 67 (C)
- Ballard 14 Llc Bldg· 40,445 sq ft · score 76 (B)
- DUNN LUMBER· 40,028 sq ft
- 4400 Building· 39,984 sq ft
- Rudd Company· 39,840 sq ft · EUI 4.1 kBtu/ft²
- Commercial Plastics· 39,600 sq ft · score 81 (B)
- Non-Refrigerated Warehouse buildings in Seattle· 164 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 1251 1st Ave S (Formerly Great Floors)'s energy grade?
1251 1st Ave S (Formerly Great Floors) did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 13.9 kBtu/ft².
How much energy does 1251 1st Ave S (Formerly Great Floors) use?
Its 2025 site energy-use intensity was 13.9 kBtu/ft² (38.4 kBtu/ft² source) across 40,967 sq ft, including 163,446 kWh of electricity and 109 therms of natural gas.
What are 1251 1st Ave S (Formerly Great Floors)'s carbon emissions?
1251 1st Ave S (Formerly Great Floors) reported 4 tCO₂e of greenhouse-gas emissions (0.1 kgCO₂e/ft²) for 2025.
Where is 1251 1st Ave S (Formerly Great Floors)?
1251 1st Ave S (Formerly Great Floors) is at 1251 1ST AVE S, in Seattle, Washington 98134. Its coordinates are 47.59081, -122.33487 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 1251 1st Ave S (Formerly Great Floors) and when was it built?
1251 1st Ave S (Formerly Great Floors) has 40,967 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1938 as its year built. It is classed as non-refrigerated warehouse.
Is 1251 1st Ave S (Formerly Great Floors) 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, “1251 1st Ave S (Formerly Great Floors), Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/1251-1st-ave-s-formerly-great-floors-95284589 (data as of October 2, 2026).