At a glance
Seattle City Light North Service Center (Nsc) is a 91,130-square-foot office building at 9700 STONE AVE N in Seattle, Washington, built in 1957. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 36 out of 100 (grade D), a site energy-use intensity of 78.3 kBtu/ft² and 104 tCO₂e of greenhouse-gas emissions. That score is higher than 7% 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 | 36 (band D) |
| Site EUI | 78.3 kBtu/ft² |
| Source EUI | 193.3 kBtu/ft² |
| GHG emissions | 104 tCO₂e |
| GHG intensity | 1.1 kgCO₂e/ft² |
| Electricity | 1,752,644 kWh |
| Natural gas | 14,072 therms |
| Gross floor area | 91,130 sq ft |
| Source record | seattle:238:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 36 | +10 | 78.3 kBtu/ft² | 104 tCO₂e |
| 2024 | 26 | -6 | 93.1 kBtu/ft² | 160 tCO₂e |
| 2023 | 32 | +2 | 81.8 kBtu/ft² | 106 tCO₂e |
| 2022 | 30 | +4 | 86.7 kBtu/ft² | 126 tCO₂e |
| 2021 | 26 | -2 | 93.1 kBtu/ft² | 150 tCO₂e |
| 2020 | 28 | +4 | 89.1 kBtu/ft² | 150 tCO₂e |
| 2019 | 24 | +1 | 97.5 kBtu/ft² | 180 tCO₂e |
| 2018 | 23 | 96.7 kBtu/ft² | 169 tCO₂e | |
| 2017 | — | 100.0 kBtu/ft² | 177 tCO₂e | |
| 2016 | — | 100.5 kBtu/ft² | 167 tCO₂e | |
| 2015 | 40 | 97.0 kBtu/ft² | 158 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
- 9700 STONE AVE N
- City
- Seattle
- State
- Washington
- ZIP
- 98103
- Coordinates
- 47.70044, -122.34136
Within ~1 km
Nearby benchmarked buildings
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See also: most efficient in Seattle · biggest emitters
How does Seattle City Light North Service Center (Nsc) compare with other office buildings in Seattle?
The latest disclosures cover 497 office buildings in Seattle, out of 3,871 buildings citywide. Seattle City Light North Service Center (Nsc)'s ENERGY STAR score of 36 compares with an average of 76 across the 378 that report a score; it scores higher than 7% of them and lower than 92%. Its site EUI of 78.3 kBtu/ft² is about 75% 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 1.1 kgCO₂e/ft² is about 57% above the group average of 0.7 kgCO₂e/ft².
At 91,130 sq ft, it is about half of the average floor area of 196,452 sq ft for those buildings. It was built in 1957, 8 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 Seattle City Light North Service Center (Nsc)'s energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Seattle City Light North Service Center (Nsc), covering report years 2015–2025. Its ENERGY STAR score went from 40 in 2015 to 36 in 2025 (-4 points); its best year on file was 2015, at 40. Site EUI moved from 97.0 kBtu/ft² (2015) to 78.3 kBtu/ft² (2025), a 19% decrease. Reported emissions went from 158 tCO₂e to 104 tCO₂e over the same span (down 35%).
What does an ENERGY STAR score of 36 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 36 means the building performs better than about 36% of its national peers. BuildingCensus bands the score into report-card grades; 36 falls in band D — lowest band (1–54). It sits 39 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. Seattle City Light North Service Center (Nsc)'s 78.3 kBtu/ft² across 91,130 sq ft works out to about 7.1 billion Btu (2,091 MWh-equivalent) in 2025. Its source EUI of 193.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,752,644 kWh of electricity and 14,072 therms of natural gas for the year.
Which law requires Seattle City Light North Service Center (Nsc) to report its energy use?
Seattle City Light North Service Center (Nsc) 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:238:2025). 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
- 4545 Roosevelt Way Ne· 91,100 sq ft · score 88 (A)
- Salal Credit Union Headquarters· 90,266 sq ft · score 85 (A)
- The Evanston Building· 90,000 sq ft · score 54 (D)
- 1130 Building Darigold Hq· 89,780 sq ft · score 76 (B)
- Broderick Building· 89,550 sq ft · score 94 (A)
- Pioneer Building· 89,355 sq ft · score 89 (A)
- 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 Seattle City Light North Service Center (Nsc)'s energy grade?
Seattle City Light North Service Center (Nsc) scores 36 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 Seattle City Light North Service Center (Nsc) use?
Its 2025 site energy-use intensity was 78.3 kBtu/ft² (193.3 kBtu/ft² source) across 91,130 sq ft, including 1,752,644 kWh of electricity and 14,072 therms of natural gas.
What are Seattle City Light North Service Center (Nsc)'s carbon emissions?
Seattle City Light North Service Center (Nsc) reported 104 tCO₂e of greenhouse-gas emissions (1.1 kgCO₂e/ft²) for 2025.
Where is Seattle City Light North Service Center (Nsc)?
Seattle City Light North Service Center (Nsc) is at 9700 STONE AVE N, in Seattle, Washington 98103. Its coordinates are 47.70044, -122.34136 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Seattle City Light North Service Center (Nsc) and when was it built?
Seattle City Light North Service Center (Nsc) has 91,130 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1957 as its year built. It is classed as office.
Is Seattle City Light North Service Center (Nsc) 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, “Seattle City Light North Service Center (Nsc), Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/seattle-city-light-north-service-center-nsc-25248325 (data as of October 2, 2026).