At a glance
35 Stone Office Building is a 171,945-square-foot office building at 3524 STONE WAY N in Seattle, Washington, built in 2023. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 88 out of 100 (grade A) and a site energy-use intensity of 40.6 kBtu/ft². That score is higher than 63% 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 | 88 (band A) |
| Site EUI | 40.6 kBtu/ft² |
| Source EUI | 112.0 kBtu/ft² |
| GHG emissions | — |
| GHG intensity | — |
| Electricity | 1,203,156 kWh |
| Natural gas | 914 therms |
| Gross floor area | 171,945 sq ft |
| Source record | seattle:52054:2025 |
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
- 3524 STONE WAY N
- City
- Seattle
- State
- Washington
- ZIP
- 98103
- Coordinates
- 47.65041, -122.34231
Within ~1 km
Nearby benchmarked buildings
- Broadstone Vinscore 83
Multifamily Housing · 824,678 sq ft
- Bowman Stonewayscore 99
Multifamily Housing · 426,320 sq ft
- Parkview & Waterside Campusscore —
Office · 404,916 sq ft
- Tableau (North Edge)score 88
Office · 338,989 sq ft
- Adobe Building-801-N 34 St.score 74
Office · 280,957 sq ft
Office · 243,334 sq ft
See also: most efficient in Seattle · biggest emitters
How does 35 Stone Office Building compare with other office buildings in Seattle?
The latest disclosures cover 497 office buildings in Seattle, out of 3,871 buildings citywide. 35 Stone Office Building's ENERGY STAR score of 88 compares with an average of 76 across the 378 that report a score; it scores higher than 63% of them and lower than 33%. Its site EUI of 40.6 kBtu/ft² is roughly in line with the average of 44.8 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 171,945 sq ft, it is about 12% below the average floor area of 196,452 sq ft for those buildings. It was built in 2023, 58 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.
What does an ENERGY STAR score of 88 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 88 means the building performs better than about 88% of its national peers. BuildingCensus bands the score into report-card grades; 88 falls in band A — high performer (85–100). 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. 35 Stone Office Building's 40.6 kBtu/ft² across 171,945 sq ft works out to about 7 billion Btu (2,046 MWh-equivalent) in 2025. Its source EUI of 112.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,203,156 kWh of electricity and 914 therms of natural gas for the year.
Which law requires 35 Stone Office Building to report its energy use?
35 Stone Office 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:52054:2025). 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
- Active Voice Building (Formerly Sixth & Lenora)· 169,020 sq ft · score 87 (A)
- National Building· 167,860 sq ft · EUI 22.5 kBtu/ft²
- Colman Building· 166,975 sq ft · score 84 (B)
- 5th & Pine· 165,202 sq ft · score 95 (A)
- Occidental Mall· 164,380 sq ft · score 80 (B)
- Salmon Bay· 163,921 sq ft
- 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 35 Stone Office Building's energy grade?
35 Stone Office Building scores 88 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2025 Seattle disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 35 Stone Office Building use?
Its 2025 site energy-use intensity was 40.6 kBtu/ft² (112.0 kBtu/ft² source) across 171,945 sq ft, including 1,203,156 kWh of electricity and 914 therms of natural gas.
What are 35 Stone Office Building's carbon emissions?
No greenhouse-gas emissions figure was reported for 2025.
Where is 35 Stone Office Building?
35 Stone Office Building is at 3524 STONE WAY N, in Seattle, Washington 98103. Its coordinates are 47.65041, -122.34231 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 35 Stone Office Building and when was it built?
35 Stone Office Building has 171,945 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 2023 as its year built. It is classed as office.
Is 35 Stone Office 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, “35 Stone Office Building, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/35-stone-office-building-3390dff1 (data as of October 2, 2026).