At a glance
Delridge Building is a 55,593-square-foot office building at 4045 DELRIDGE WAY SW in Seattle, Washington, built in 1960. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 60 out of 100 (grade C), a site energy-use intensity of 64.7 kBtu/ft² and 89 tCO₂e of greenhouse-gas emissions. That score is higher than 17% 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 | 60 (band C) |
| Site EUI | 64.7 kBtu/ft² |
| Source EUI | 133.0 kBtu/ft² |
| GHG emissions | 89 tCO₂e |
| GHG intensity | 1.7 kgCO₂e/ft² |
| Electricity | 579,868 kWh |
| Natural gas | 14,694 therms |
| Gross floor area | 55,593 sq ft |
| Source record | seattle:462:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 60 | -13 | 64.7 kBtu/ft² | 89 tCO₂e |
| 2024 | 73 | -5 | 58.3 kBtu/ft² | 90 tCO₂e |
| 2023 | 78 | -2 | 57.1 kBtu/ft² | 100 tCO₂e |
| 2022 | 80 | +1 | 54.0 kBtu/ft² | 89 tCO₂e |
| 2021 | 79 | ±0 | 54.1 kBtu/ft² | 89 tCO₂e |
| 2020 | 79 | +30 | 51.7 kBtu/ft² | 81 tCO₂e |
| 2019 | 49 | +5 | 73.4 kBtu/ft² | 87 tCO₂e |
| 2018 | 44 | +7 | 76.7 kBtu/ft² | 88 tCO₂e |
| 2017 | 37 | -18 | 78.6 kBtu/ft² | 94 tCO₂e |
| 2016 | 55 | -2 | 76.0 kBtu/ft² | 90 tCO₂e |
| 2015 | 57 | 73.7 kBtu/ft² | 85 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
- 4045 DELRIDGE WAY SW
- City
- Seattle
- State
- Washington
- ZIP
- 98106
- Coordinates
- 47.56710, -122.36416
Within ~1 km
Nearby benchmarked buildings
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- West Seattle Corporate Centerscore 89
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See also: most efficient in Seattle · biggest emitters
How does Delridge Building compare with other office buildings in Seattle?
The latest disclosures cover 497 office buildings in Seattle, out of 3,871 buildings citywide. Delridge Building's ENERGY STAR score of 60 compares with an average of 76 across the 378 that report a score; it scores higher than 17% of them and lower than 82%. Its site EUI of 64.7 kBtu/ft² is about 44% 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 1.7 kgCO₂e/ft² is about 139% above the group average of 0.7 kgCO₂e/ft².
At 55,593 sq ft, it is about 72% 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 Delridge Building's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Delridge Building, covering report years 2015–2025. Its ENERGY STAR score went from 57 in 2015 to 60 in 2025 (+3 points); its best year on file was 2022, at 80. Site EUI moved from 73.7 kBtu/ft² (2015) to 64.7 kBtu/ft² (2025), a 12% decrease. Reported emissions went from 85 tCO₂e to 89 tCO₂e over the same span (up 5%).
What does an ENERGY STAR score of 60 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: a score of 60 means the building performs better than about 60% of its national peers. BuildingCensus bands the score into report-card grades; 60 falls in band C — below median (55–69). It sits 15 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. Delridge Building's 64.7 kBtu/ft² across 55,593 sq ft works out to about 3.6 billion Btu (1,054 MWh-equivalent) in 2025. Its source EUI of 133.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 579,868 kWh of electricity and 14,694 therms of natural gas for the year.
Which law requires Delridge Building to report its energy use?
Delridge Building 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:462:2025). 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
- Wa Dept Of Social & Health Services (Dshs)· 54,984 sq ft · score 73 (B)
- Pacific Commercial Building· 54,805 sq ft · EUI 66.3 kBtu/ft²
- Design Service Bldg· 54,465 sq ft · score 66 (C)
- Pigott Building· 54,372 sq ft · score 86 (A)
- Queen Anne Square West· 54,015 sq ft · EUI 37.8 kBtu/ft²
- 830 4th Ave South - Turner Construction· 53,840 sq ft · EUI 70.5 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 Delridge Building's energy grade?
Delridge Building scores 60 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2025 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Delridge Building use?
Its 2025 site energy-use intensity was 64.7 kBtu/ft² (133.0 kBtu/ft² source) across 55,593 sq ft, including 579,868 kWh of electricity and 14,694 therms of natural gas.
What are Delridge Building's carbon emissions?
Delridge Building reported 89 tCO₂e of greenhouse-gas emissions (1.7 kgCO₂e/ft²) for 2025.
Where is Delridge Building?
Delridge Building is at 4045 DELRIDGE WAY SW, in Seattle, Washington 98106. Its coordinates are 47.56710, -122.36416 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Delridge Building and when was it built?
Delridge Building has 55,593 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 Delridge Building 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, “Delridge Building, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/delridge-building-f0c55d2c (data as of October 2, 2026).