At a glance
Virginia Mason - Cassel Craig Offices is a 39,760-square-foot office building at 1218 TERRY AVE in Seattle, Washington, built in 1925. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 74 out of 100 (grade B), a site energy-use intensity of 79.8 kBtu/ft² and 206 tCO₂e of greenhouse-gas emissions. That score is higher than 32% 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 | 74 (band B) |
| Site EUI | 79.8 kBtu/ft² |
| Source EUI | 108.4 kBtu/ft² |
| GHG emissions | 206 tCO₂e |
| GHG intensity | 5.6 kgCO₂e/ft² |
| Electricity | 91,452 kWh |
| Natural gas | 2,447 therms |
| Gross floor area | 39,760 sq ft |
| Source record | seattle:21115:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 74 | -3 | 79.8 kBtu/ft² | 206 tCO₂e |
| 2024 | 77 | -2 | 72.9 kBtu/ft² | 183 tCO₂e |
| 2023 | 79 | +7 | 70.0 kBtu/ft² | 173 tCO₂e |
| 2022 | 72 | ±0 | 80.9 kBtu/ft² | 201 tCO₂e |
| 2021 | 72 | +1 | 78.4 kBtu/ft² | 193 tCO₂e |
| 2020 | 71 | +3 | 80.2 kBtu/ft² | 200 tCO₂e |
| 2019 | 68 | -11 | 83.8 kBtu/ft² | 208 tCO₂e |
| 2018 | 79 | -15 | 63.9 kBtu/ft² | 165 tCO₂e |
| 2017 | 94 | +2 | 63.2 kBtu/ft² | 163 tCO₂e |
| 2016 | 92 | +1 | 62.3 kBtu/ft² | 156 tCO₂e |
| 2015 | 91 | 64.6 kBtu/ft² | 160 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
- 1218 TERRY AVE
- City
- Seattle
- State
- Washington
- ZIP
- 98101
- Coordinates
- 47.61098, -122.32766
Within ~1 km
Nearby benchmarked buildings
Parking · 2,080,885 sq ft
- Columbia Centerscore 90
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- Seattle Convention Centerscore —
Convention Center · 1,842,925 sq ft
- Two Union Squarescore 96
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- Us Bank Centerscore 87
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See also: most efficient in Seattle · biggest emitters
How does Virginia Mason - Cassel Craig Offices compare with other office buildings in Seattle?
The latest disclosures cover 497 office buildings in Seattle, out of 3,871 buildings citywide. Virginia Mason - Cassel Craig Offices's ENERGY STAR score of 74 compares with an average of 76 across the 378 that report a score; it scores higher than 32% of them and lower than 67%. Its site EUI of 79.8 kBtu/ft² is about 78% 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 5.6 kgCO₂e/ft² is about 704% above the group average of 0.7 kgCO₂e/ft².
At 39,760 sq ft, it is about 80% below the average floor area of 196,452 sq ft for those buildings. It was built in 1925, 40 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 Virginia Mason - Cassel Craig Offices's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Virginia Mason - Cassel Craig Offices, covering report years 2015–2025. Its ENERGY STAR score went from 91 in 2015 to 74 in 2025 (-17 points); its best year on file was 2017, at 94. Site EUI moved from 64.6 kBtu/ft² (2015) to 79.8 kBtu/ft² (2025), an 24% increase. Reported emissions went from 160 tCO₂e to 206 tCO₂e over the same span (up 29%).
What does an ENERGY STAR score of 74 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 74 means the building performs better than about 74% of its national peers. BuildingCensus bands the score into report-card grades; 74 falls in band B — above median (70–84). It sits 1 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. Virginia Mason - Cassel Craig Offices's 79.8 kBtu/ft² across 39,760 sq ft works out to about 3.2 billion Btu (930 MWh-equivalent) in 2025. Its source EUI of 108.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 91,452 kWh of electricity and 2,447 therms of natural gas for the year.
Which law requires Virginia Mason - Cassel Craig Offices to report its energy use?
Virginia Mason - Cassel Craig Offices 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:21115:2025). 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
- American Red Cross· 39,170 sq ft · score 55 (C)
- Sodo Commerce Building· 39,036 sq ft · score 95 (A)
- Union Trust Building· 39,030 sq ft · EUI 7.4 kBtu/ft²
- Duncan Building· 38,675 sq ft
- Rli Building· 38,460 sq ft · score 59 (C)
- Maynard Building· 38,376 sq ft · score 26 (D)
- 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 Virginia Mason - Cassel Craig Offices's energy grade?
Virginia Mason - Cassel Craig Offices scores 74 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 Virginia Mason - Cassel Craig Offices use?
Its 2025 site energy-use intensity was 79.8 kBtu/ft² (108.4 kBtu/ft² source) across 39,760 sq ft, including 91,452 kWh of electricity and 2,447 therms of natural gas.
What are Virginia Mason - Cassel Craig Offices's carbon emissions?
Virginia Mason - Cassel Craig Offices reported 206 tCO₂e of greenhouse-gas emissions (5.6 kgCO₂e/ft²) for 2025.
Where is Virginia Mason - Cassel Craig Offices?
Virginia Mason - Cassel Craig Offices is at 1218 TERRY AVE, in Seattle, Washington 98101. Its coordinates are 47.61098, -122.32766 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Virginia Mason - Cassel Craig Offices and when was it built?
Virginia Mason - Cassel Craig Offices has 39,760 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1925 as its year built. It is classed as office.
Is Virginia Mason - Cassel Craig Offices 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, “Virginia Mason - Cassel Craig Offices, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/virginia-mason-cassel-craig-offices-c1261205 (data as of October 2, 2026).