At a glance
Northgate Office Building is a 53,730-square-foot office building at 9750 3RD AVE NE in Seattle, Washington, built in 1979. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 10 out of 100 (grade D), a site energy-use intensity of 103.4 kBtu/ft² and 31 tCO₂e of greenhouse-gas emissions. That score is higher than 2% 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 | 10 (band D) |
| Site EUI | 103.4 kBtu/ft² |
| Source EUI | 289.4 kBtu/ft² |
| GHG emissions | 31 tCO₂e |
| GHG intensity | 0.6 kgCO₂e/ft² |
| Electricity | 1,577,481 kWh |
| Gross floor area | 53,730 sq ft |
| Source record | seattle:461:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 10 | -9 | 103.4 kBtu/ft² | 31 tCO₂e |
| 2024 | 19 | -1 | 84.1 kBtu/ft² | 25 tCO₂e |
| 2023 | 20 | -3 | 84.0 kBtu/ft² | 25 tCO₂e |
| 2022 | 23 | +1 | 81.9 kBtu/ft² | 25 tCO₂e |
| 2021 | 22 | -2 | 83.2 kBtu/ft² | 25 tCO₂e |
| 2020 | 24 | -8 | 82.1 kBtu/ft² | 26 tCO₂e |
| 2019 | 32 | +1 | 74.6 kBtu/ft² | 23 tCO₂e |
| 2018 | 31 | +22 | 75.6 kBtu/ft² | 24 tCO₂e |
| 2017 | 9 | -11 | 99.6 kBtu/ft² | 31 tCO₂e |
| 2016 | 20 | +2 | 88.3 kBtu/ft² | 28 tCO₂e |
| 2015 | 18 | 90.1 kBtu/ft² | 28 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
- 9750 3RD AVE NE
- City
- Seattle
- State
- Washington
- ZIP
- 98115
- Coordinates
- 47.70063, -122.32487
Within ~1 km
Nearby benchmarked buildings
- Thornton Place (Parent Property)score 61
Multifamily Housing · 771,253 sq ft
- Modera Northgatescore 100
Multifamily Housing · 426,841 sq ft
Parking · 423,569 sq ft
- 525 At The Enclavescore 91
Multifamily Housing · 313,595 sq ft
Retail Store · 302,812 sq ft
- 507 Northgatescore 21
Mixed Use Property · 295,410 sq ft
See also: most efficient in Seattle · biggest emitters
How does Northgate Office Building compare with other office buildings in Seattle?
The latest disclosures cover 497 office buildings in Seattle, out of 3,871 buildings citywide. Northgate Office Building's ENERGY STAR score of 10 compares with an average of 76 across the 378 that report a score; it scores higher than 2% of them and lower than 98%. Its site EUI of 103.4 kBtu/ft² is about 131% 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 0.6 kgCO₂e/ft² is about 14% below the group average of 0.7 kgCO₂e/ft².
At 53,730 sq ft, it is about 73% below 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 Northgate Office Building's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Northgate Office Building, covering report years 2015–2025. Its ENERGY STAR score went from 18 in 2015 to 10 in 2025 (-8 points); its best year on file was 2019, at 32. Site EUI moved from 90.1 kBtu/ft² (2015) to 103.4 kBtu/ft² (2025), an 15% increase. Reported emissions went from 28 tCO₂e to 31 tCO₂e over the same span (up 11%).
What does an ENERGY STAR score of 10 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 10 means the building performs better than about 10% of its national peers. BuildingCensus bands the score into report-card grades; 10 falls in band D — lowest band (1–54). It sits 65 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. Northgate Office Building's 103.4 kBtu/ft² across 53,730 sq ft works out to about 5.6 billion Btu (1,628 MWh-equivalent) in 2025. Its source EUI of 289.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,577,481 kWh of electricity for the year.
Which law requires Northgate Office Building to report its energy use?
Northgate 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:461:2025). 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
- Mckinstry 220 South Dawson· 53,620 sq ft · score 85 (A)
- Prologis Park Seattle 2· 53,550 sq ft · score 94 (A)
- Tableau· 53,108 sq ft · score 36 (D)
- Marshall Building/Dahlia Lounge· 52,800 sq ft · score 53 (D)
- Resource Center· 52,759 sq ft · score 84 (B)
- El Centro De La Raza· 52,554 sq ft · score 81 (B)
- 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 Northgate Office Building's energy grade?
Northgate Office Building scores 10 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 Northgate Office Building use?
Its 2025 site energy-use intensity was 103.4 kBtu/ft² (289.4 kBtu/ft² source) across 53,730 sq ft, including 1,577,481 kWh of electricity.
What are Northgate Office Building's carbon emissions?
Northgate Office Building reported 31 tCO₂e of greenhouse-gas emissions (0.6 kgCO₂e/ft²) for 2025.
Where is Northgate Office Building?
Northgate Office Building is at 9750 3RD AVE NE, in Seattle, Washington 98115. Its coordinates are 47.70063, -122.32487 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Northgate Office Building and when was it built?
Northgate Office Building has 53,730 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 Northgate 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, “Northgate Office Building, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/northgate-office-building-9887ea8d (data as of October 2, 2026).