At a glance
Seaboard Building Condominium is a 111,137-square-foot other building at 1500 4TH AVE in Seattle, Washington, built in 1909. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 64.0 kBtu/ft² and 220 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 64.0 kBtu/ft² |
| Source EUI | 125.0 kBtu/ft² |
| GHG emissions | 220 tCO₂e |
| GHG intensity | 1.8 kgCO₂e/ft² |
| Electricity | 1,181,178 kWh |
| Natural gas | 37,731 therms |
| Gross floor area | 111,137 sq ft |
| Source record | seattle:23368:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 64.0 kBtu/ft² | 220 tCO₂e | |
| 2024 | — | — | — | |
| 2023 | — | 93.5 kBtu/ft² | 267 tCO₂e | |
| 2022 | — | 140.4 kBtu/ft² | 513 tCO₂e | |
| 2021 | — | 55.4 kBtu/ft² | 379 tCO₂e | |
| 2020 | — | 124.6 kBtu/ft² | 368 tCO₂e | |
| 2019 | — | 102.1 kBtu/ft² | 258 tCO₂e | |
| 2018 | — | 99.3 kBtu/ft² | 268 tCO₂e | |
| 2017 | — | 107.8 kBtu/ft² | 336 tCO₂e | |
| 2016 | — | 96.4 kBtu/ft² | 289 tCO₂e | |
| 2015 | — | 92.8 kBtu/ft² | 250 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
- 1500 4TH AVE
- City
- Seattle
- State
- Washington
- ZIP
- 98101
- Coordinates
- 47.61056, -122.33661
Within ~1 km
Nearby benchmarked buildings
- Columbia Centerscore 90
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- Seattle Convention Centerscore —
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- Two Union Squarescore 96
Office · 1,605,578 sq ft
Office · 1,599,394 sq ft
- Day 1 Tower And Spheres (Amazon)score 93
Office · 1,599,230 sq ft
- Russell Investments Centerscore 92
Office · 1,592,914 sq ft
See also: most efficient in Seattle · biggest emitters
How does Seaboard Building Condominium compare with other other buildings in Seattle?
The latest disclosures cover 45 other buildings in Seattle, out of 3,871 buildings citywide. Its site EUI of 64.0 kBtu/ft² is roughly in line with the average of 59.4 kBtu/ft². Its emissions intensity of 1.8 kgCO₂e/ft² is about 65% above the group average of 1.1 kgCO₂e/ft².
At 111,137 sq ft, it is about twice the average floor area of 55,708 sq ft for those buildings. It was built in 1909, 43 years earlier than the group's average year built (1952). Across all 24 jurisdictions BuildingCensus covers, the 1,327 other buildings average an ENERGY STAR score of 60 and a site EUI of 63.3 kBtu/ft².
How has Seaboard Building Condominium's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Seaboard Building Condominium, covering report years 2015–2025. Site EUI moved from 92.8 kBtu/ft² (2015) to 64.0 kBtu/ft² (2025), a 31% decrease. Reported emissions went from 250 tCO₂e to 220 tCO₂e over the same span (down 12%).
What does a site EUI of 64.0 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. Seaboard Building Condominium's 64.0 kBtu/ft² across 111,137 sq ft works out to about 7.1 billion Btu (2,085 MWh-equivalent) in 2025. Its source EUI of 125.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,181,178 kWh of electricity and 37,731 therms of natural gas for the year.
Which law requires Seaboard Building Condominium to report its energy use?
Seaboard Building Condominium 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:23368:2025). 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 other buildings in Seattle
- Wsecu Plaza- Seattle· 97,512 sq ft · EUI 24.2 kBtu/ft²
- Nordic Cold Storage Company· 83,400 sq ft · EUI 1.2 kBtu/ft²
- Kcts 9· 66,240 sq ft · EUI 43.8 kBtu/ft²
- Bagley Wright Theater (Rep) - Seattle Center· 65,127 sq ft · EUI 75.5 kBtu/ft²
- MERCER ARENA - SEATTLE CENTER· 60,696 sq ft · EUI 2.6 kBtu/ft²
- 424 S CLOVERDALE ST· 50,417 sq ft
- Other buildings in Seattle· 45 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 Seaboard Building Condominium's energy grade?
Seaboard Building Condominium did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 64.0 kBtu/ft².
How much energy does Seaboard Building Condominium use?
Its 2025 site energy-use intensity was 64.0 kBtu/ft² (125.0 kBtu/ft² source) across 111,137 sq ft, including 1,181,178 kWh of electricity and 37,731 therms of natural gas.
What are Seaboard Building Condominium's carbon emissions?
Seaboard Building Condominium reported 220 tCO₂e of greenhouse-gas emissions (1.8 kgCO₂e/ft²) for 2025.
Where is Seaboard Building Condominium?
Seaboard Building Condominium is at 1500 4TH AVE, in Seattle, Washington 98101. Its coordinates are 47.61056, -122.33661 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Seaboard Building Condominium and when was it built?
Seaboard Building Condominium has 111,137 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1909 as its year built. It is classed as other.
Is Seaboard Building Condominium 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, “Seaboard Building Condominium, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/seaboard-building-condominium-71023494 (data as of October 2, 2026).