At a glance
Northwest Bldg is a 85,385-square-foot office building at 2323 EASTLAKE AVE E in Seattle, Washington, built in 1978. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 100 out of 100 (grade A), a site energy-use intensity of 74.4 kBtu/ft² and 22 tCO₂e of greenhouse-gas emissions. That score is higher than 96% 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 | 100 (band A) |
| Site EUI | 74.4 kBtu/ft² |
| Source EUI | 208.4 kBtu/ft² |
| GHG emissions | 22 tCO₂e |
| GHG intensity | 0.4 kgCO₂e/ft² |
| Electricity | 1,122,990 kWh |
| Gross floor area | 85,385 sq ft |
| Source record | seattle:570:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 100 | ±0 | 74.4 kBtu/ft² | 22 tCO₂e |
| 2024 | 100 | ±0 | 79.8 kBtu/ft² | 24 tCO₂e |
| 2023 | 100 | ±0 | 79.2 kBtu/ft² | 24 tCO₂e |
| 2022 | 100 | +3 | 83.7 kBtu/ft² | 25 tCO₂e |
| 2021 | 97 | 90.7 kBtu/ft² | 27 tCO₂e | |
| 2020 | — | 90.2 kBtu/ft² | 28 tCO₂e | |
| 2019 | — | 84.2 kBtu/ft² | 26 tCO₂e | |
| 2018 | — | 87.0 kBtu/ft² | 27 tCO₂e | |
| 2017 | — | 91.5 kBtu/ft² | 28 tCO₂e | |
| 2016 | — | 91.4 kBtu/ft² | 28 tCO₂e | |
| 2015 | 77 | 92.4 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
- 2323 EASTLAKE AVE E
- City
- Seattle
- State
- Washington
- ZIP
- 98102
- Coordinates
- 47.64037, -122.32626
Within ~1 km
Nearby benchmarked buildings
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- 188 East Blainescore —
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- 1616 Eastlake Buildingscore —
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- Liza Eastlakescore 99
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Laboratory · 175,918 sq ft
- Eastlake 2851score 100
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See also: most efficient in Seattle · biggest emitters
How does Northwest Bldg compare with other office buildings in Seattle?
The latest disclosures cover 497 office buildings in Seattle, out of 3,871 buildings citywide. Northwest Bldg's ENERGY STAR score of 100 compares with an average of 76 across the 378 that report a score; it scores higher than 96% of them. Its site EUI of 74.4 kBtu/ft² is about 66% 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 0.4 kgCO₂e/ft² is about 39% below the group average of 0.7 kgCO₂e/ft².
At 85,385 sq ft, it is about 57% below the average floor area of 196,452 sq ft for those buildings. It was built in 1978, 13 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 Northwest Bldg's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Northwest Bldg, covering report years 2015–2025. Its ENERGY STAR score went from 77 in 2015 to 100 in 2025 (+23 points); its best year on file was 2022, at 100. Site EUI moved from 92.4 kBtu/ft² (2015) to 74.4 kBtu/ft² (2025), a 19% decrease. Reported emissions went from 28 tCO₂e to 22 tCO₂e over the same span (down 22%).
What does an ENERGY STAR score of 100 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: 100 is the top of the scale. BuildingCensus bands the score into report-card grades; 100 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. Northwest Bldg's 74.4 kBtu/ft² across 85,385 sq ft works out to about 6.4 billion Btu (1,862 MWh-equivalent) in 2025. Its source EUI of 208.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,122,990 kWh of electricity for the year.
Which law requires Northwest Bldg to report its energy use?
Northwest Bldg 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:570:2025). 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
- Emerald Landing I· 84,116 sq ft · score 10 (D)
- 400 Mercer Street Office Building· 80,019 sq ft · score 64 (C)
- O'shea Building/Gap· 79,957 sq ft · score 94 (A)
- Poll Building· 79,920 sq ft · EUI 49.8 kBtu/ft²
- HERITAGE BUILDING· 78,920 sq ft · EUI 18.4 kBtu/ft²
- Grange Office Plaza· 77,662 sq ft · score 90 (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 Northwest Bldg's energy grade?
Northwest Bldg scores 100 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 Northwest Bldg use?
Its 2025 site energy-use intensity was 74.4 kBtu/ft² (208.4 kBtu/ft² source) across 85,385 sq ft, including 1,122,990 kWh of electricity.
What are Northwest Bldg's carbon emissions?
Northwest Bldg reported 22 tCO₂e of greenhouse-gas emissions (0.4 kgCO₂e/ft²) for 2025.
Where is Northwest Bldg?
Northwest Bldg is at 2323 EASTLAKE AVE E, in Seattle, Washington 98102. Its coordinates are 47.64037, -122.32626 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Northwest Bldg and when was it built?
Northwest Bldg has 85,385 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1978 as its year built. It is classed as office.
Is Northwest Bldg 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, “Northwest Bldg, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/northwest-bldg-c28dd3f4 (data as of October 2, 2026).