At a glance
Fourth & Blanchard Building is a 543,876-square-foot office building at 2101 4TH AVE in Seattle, Washington, built in 1979. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 78 out of 100 (grade B), a site energy-use intensity of 38.6 kBtu/ft² and 93 tCO₂e of greenhouse-gas emissions. That score is higher than 38% 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 | 78 (band B) |
| Site EUI | 38.6 kBtu/ft² |
| Source EUI | 108.0 kBtu/ft² |
| GHG emissions | 93 tCO₂e |
| GHG intensity | 0.2 kgCO₂e/ft² |
| Electricity | 4,746,851 kWh |
| Gross floor area | 543,876 sq ft |
| Source record | seattle:373:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 78 | 38.6 kBtu/ft² | 93 tCO₂e | |
| 2024 | — | — | — | |
| 2023 | 80 | -3 | 36.9 kBtu/ft² | 93 tCO₂e |
| 2022 | 83 | +8 | 38.0 kBtu/ft² | 96 tCO₂e |
| 2021 | 75 | -4 | 41.3 kBtu/ft² | 104 tCO₂e |
| 2020 | 79 | -1 | 40.7 kBtu/ft² | 103 tCO₂e |
| 2019 | 80 | +3 | 48.7 kBtu/ft² | 121 tCO₂e |
| 2018 | 77 | +15 | 51.9 kBtu/ft² | 127 tCO₂e |
| 2017 | 62 | -17 | 61.5 kBtu/ft² | 150 tCO₂e |
| 2016 | 79 | +3 | 59.7 kBtu/ft² | 147 tCO₂e |
| 2015 | 76 | 59.7 kBtu/ft² | 150 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
- 2101 4TH AVE
- City
- Seattle
- State
- Washington
- ZIP
- 98121
- Coordinates
- 47.61431, -122.34244
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does Fourth & Blanchard Building compare with other office buildings in Seattle?
The latest disclosures cover 497 office buildings in Seattle, out of 3,871 buildings citywide. Fourth & Blanchard Building's ENERGY STAR score of 78 compares with an average of 76 across the 378 that report a score; it scores higher than 38% of them and lower than 60%. Its site EUI of 38.6 kBtu/ft² is about 14% below the average of 44.8 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.2 kgCO₂e/ft² is about 69% below the group average of 0.7 kgCO₂e/ft².
At 543,876 sq ft, it is about 177% above the average floor area of 196,452 sq ft for those buildings. It was built in 1979, 14 years later 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 Fourth & Blanchard Building's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Fourth & Blanchard Building, covering report years 2015–2025. Its ENERGY STAR score went from 76 in 2015 to 78 in 2025 (+2 points); its best year on file was 2022, at 83. Site EUI moved from 59.7 kBtu/ft² (2015) to 38.6 kBtu/ft² (2025), a 35% decrease. Reported emissions went from 150 tCO₂e to 93 tCO₂e over the same span (down 38%).
What does an ENERGY STAR score of 78 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 78 means the building performs better than about 78% of its national peers. BuildingCensus bands the score into report-card grades; 78 falls in band B — above median (70–84). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. 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. Fourth & Blanchard Building's 38.6 kBtu/ft² across 543,876 sq ft works out to about 21 billion Btu (6,153 MWh-equivalent) in 2025. Its source EUI of 108.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 4,746,851 kWh of electricity for the year.
Which law requires Fourth & Blanchard Building to report its energy use?
Fourth & Blanchard 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:373:2025). 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
- One Convention Place· 538,933 sq ft · score 84 (B)
- 400 Fairview Office Bldg· 536,697 sq ft · score 92 (A)
- City Place V (Arizona)· 526,423 sq ft · score 96 (A)
- Westlake Tower· 516,342 sq ft · score 88 (A)
- Dexter Station Office· 513,816 sq ft · score 83 (B)
- Block 38, 520 WESTLAKE AVE N· 512,665 sq ft · EUI 19.1 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 Fourth & Blanchard Building's energy grade?
Fourth & Blanchard Building scores 78 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2025 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Fourth & Blanchard Building use?
Its 2025 site energy-use intensity was 38.6 kBtu/ft² (108.0 kBtu/ft² source) across 543,876 sq ft, including 4,746,851 kWh of electricity.
What are Fourth & Blanchard Building's carbon emissions?
Fourth & Blanchard Building reported 93 tCO₂e of greenhouse-gas emissions (0.2 kgCO₂e/ft²) for 2025.
Where is Fourth & Blanchard Building?
Fourth & Blanchard Building is at 2101 4TH AVE, in Seattle, Washington 98121. Its coordinates are 47.61431, -122.34244 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Fourth & Blanchard Building and when was it built?
Fourth & Blanchard Building has 543,876 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1979 as its year built. It is classed as office.
Is Fourth & Blanchard 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, “Fourth & Blanchard Building, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/fourth-blanchard-building-b6a34a26 (data as of October 2, 2026).