At a glance
4545 15th Ave Ne is a 113,944-square-foot office building at 4545 15TH AVE NE in Seattle, Washington, built in 1960. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 1 out of 100 (grade D), a site energy-use intensity of 278.3 kBtu/ft² and 152 tCO₂e of greenhouse-gas emissions. That score is higher than 0% of the 378 scored office buildings in Seattle.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 1 (band D) |
| Site EUI | 278.3 kBtu/ft² |
| Source EUI | 767.6 kBtu/ft² |
| GHG emissions | 152 tCO₂e |
| GHG intensity | 1.8 kgCO₂e/ft² |
| Electricity | 6,657,802 kWh |
| Natural gas | 5,581 therms |
| Gross floor area | 113,944 sq ft |
| Source record | seattle:1281:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 1 | ±0 | 278.3 kBtu/ft² | 152 tCO₂e |
| 2024 | 1 | ±0 | 254.6 kBtu/ft² | 124 tCO₂e |
| 2023 | 1 | ±0 | 254.5 kBtu/ft² | 129 tCO₂e |
| 2022 | 1 | ±0 | 260.1 kBtu/ft² | 133 tCO₂e |
| 2021 | 1 | ±0 | 258.3 kBtu/ft² | 177 tCO₂e |
| 2020 | 1 | ±0 | 291.9 kBtu/ft² | 183 tCO₂e |
| 2019 | 1 | ±0 | 336.9 kBtu/ft² | 160 tCO₂e |
| 2018 | 1 | ±0 | 302.0 kBtu/ft² | 116 tCO₂e |
| 2017 | 1 | ±0 | 271.6 kBtu/ft² | 113 tCO₂e |
| 2016 | 1 | ±0 | 273.3 kBtu/ft² | 108 tCO₂e |
| 2015 | 1 | 273.9 kBtu/ft² | 104 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
- 4545 15TH AVE NE
- City
- Seattle
- State
- Washington
- ZIP
- 98105
- Coordinates
- 47.66181, -122.31231
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does 4545 15th Ave Ne compare with other office buildings in Seattle?
The latest disclosures cover 497 office buildings in Seattle, out of 3,871 buildings citywide. 4545 15th Ave Ne's ENERGY STAR score of 1 compares with an average of 76 across the 378 that report a score; it scores higher than 0% of them and lower than 99%. Its site EUI of 278.3 kBtu/ft² is about 521% above the average of 44.8 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 1.8 kgCO₂e/ft² is about 160% above the group average of 0.7 kgCO₂e/ft².
At 113,944 sq ft, it is about 42% below the average floor area of 196,452 sq ft for those buildings. It was built in 1960, 5 years earlier than the group's average year built (1965). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has 4545 15th Ave Ne's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for 4545 15th Ave Ne, covering report years 2015–2025. Its ENERGY STAR score was 1 in both 2015 and 2025. Site EUI moved from 273.9 kBtu/ft² (2015) to 278.3 kBtu/ft² (2025), an 2% increase. Reported emissions went from 104 tCO₂e to 152 tCO₂e over the same span (up 46%).
What does an ENERGY STAR score of 1 mean?
ENERGY STAR scores run from 1 to 100 and are computed by the EPA's Portfolio Manager as a percentile against similar buildings nationwide, adjusted for climate, size and use: 1 is the bottom of the scale. BuildingCensus bands the score into report-card grades; 1 falls in band D — lowest band (1–54). It sits 74 points below 75, the threshold for ENERGY STAR certification. In Seattle, 69% of scored buildings are at 75 or above.
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. 4545 15th Ave Ne's 278.3 kBtu/ft² across 113,944 sq ft works out to about 31.7 billion Btu (9,293 MWh-equivalent) in 2025. Its source EUI of 767.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 6,657,802 kWh of electricity and 5,581 therms of natural gas for the year.
Which law requires 4545 15th Ave Ne to report its energy use?
4545 15th Ave Ne 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:1281:2025). 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 office buildings in Seattle
- Polson Building· 112,560 sq ft · score 94 (A)
- Interbay Work Lofts· 111,750 sq ft · score 100 (A)
- Wafd Bank· 109,830 sq ft · score 73 (B)
- Joshua Green Building· 109,266 sq ft · score 77 (B)
- Legacy Capitol Hill· 105,204 sq ft · score 98 (A)
- 190 Queen Anne· 102,930 sq ft · EUI 20.4 kBtu/ft²
- Office buildings in Seattle· 497 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 4545 15th Ave Ne's energy grade?
4545 15th Ave Ne scores 1 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2025 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 4545 15th Ave Ne use?
Its 2025 site energy-use intensity was 278.3 kBtu/ft² (767.6 kBtu/ft² source) across 113,944 sq ft, including 6,657,802 kWh of electricity and 5,581 therms of natural gas.
What are 4545 15th Ave Ne's carbon emissions?
4545 15th Ave Ne reported 152 tCO₂e of greenhouse-gas emissions (1.8 kgCO₂e/ft²) for 2025.
Where is 4545 15th Ave Ne?
4545 15th Ave Ne is at 4545 15TH AVE NE, in Seattle, Washington 98105. Its coordinates are 47.66181, -122.31231 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 4545 15th Ave Ne and when was it built?
4545 15th Ave Ne has 113,944 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1960 as its year built. It is classed as office.
Is 4545 15th Ave Ne 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, “4545 15th Ave Ne, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/4545-15th-ave-ne-a22db335 (data as of October 2, 2026).