At a glance
Belltown Center is a 25,920-square-foot office building at 2106 2ND AVE in Seattle, Washington, built in 1919. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 70 out of 100 (grade B), a site energy-use intensity of 70.0 kBtu/ft² and 51 tCO₂e of greenhouse-gas emissions. That score is higher than 26% 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 | 70 (band B) |
| Site EUI | 70.0 kBtu/ft² |
| Source EUI | 130.8 kBtu/ft² |
| GHG emissions | 51 tCO₂e |
| GHG intensity | 2.1 kgCO₂e/ft² |
| Electricity | 229,907 kWh |
| Natural gas | 8,963 therms |
| Gross floor area | 25,920 sq ft |
| Source record | seattle:21108:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 70 | -1 | 70.0 kBtu/ft² | 51 tCO₂e |
| 2024 | 71 | -3 | 68.1 kBtu/ft² | 50 tCO₂e |
| 2023 | 74 | +4 | 53.4 kBtu/ft² | 25 tCO₂e |
| 2022 | 70 | +4 | 65.4 kBtu/ft² | 42 tCO₂e |
| 2021 | 66 | +14 | 79.2 kBtu/ft² | 64 tCO₂e |
| 2020 | 52 | ±0 | 85.9 kBtu/ft² | 59 tCO₂e |
| 2019 | 52 | -4 | 85.7 kBtu/ft² | 58 tCO₂e |
| 2018 | 56 | +7 | 77.7 kBtu/ft² | 48 tCO₂e |
| 2017 | 49 | -26 | 81.6 kBtu/ft² | 55 tCO₂e |
| 2016 | 75 | -9 | 74.8 kBtu/ft² | 45 tCO₂e |
| 2015 | 84 | 60.6 kBtu/ft² | 34 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
- 2106 2ND AVE
- City
- Seattle
- State
- Washington
- ZIP
- 98121
- Coordinates
- 47.61302, -122.34316
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does Belltown Center compare with other office buildings in Seattle?
The latest disclosures cover 497 office buildings in Seattle, out of 3,871 buildings citywide. Belltown Center's ENERGY STAR score of 70 compares with an average of 76 across the 378 that report a score; it scores higher than 26% of them and lower than 72%. Its site EUI of 70.0 kBtu/ft² is about 56% 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 2.1 kgCO₂e/ft² is about 201% above the group average of 0.7 kgCO₂e/ft².
At 25,920 sq ft, it is about 87% below the average floor area of 196,452 sq ft for those buildings. It was built in 1919, 46 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 Belltown Center's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Belltown Center, covering report years 2015–2025. Its ENERGY STAR score went from 84 in 2015 to 70 in 2025 (-14 points); its best year on file was 2015, at 84. Site EUI moved from 60.6 kBtu/ft² (2015) to 70.0 kBtu/ft² (2025), an 16% increase. Reported emissions went from 34 tCO₂e to 51 tCO₂e over the same span (up 51%).
What does an ENERGY STAR score of 70 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 70 means the building performs better than about 70% of its national peers. BuildingCensus bands the score into report-card grades; 70 falls in band B — above median (70–84). It sits 5 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. Belltown Center's 70.0 kBtu/ft² across 25,920 sq ft works out to about 1.8 billion Btu (532 MWh-equivalent) in 2025. Its source EUI of 130.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 229,907 kWh of electricity and 8,963 therms of natural gas for the year.
Which law requires Belltown Center to report its energy use?
Belltown Center 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:21108:2025). 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
- 2300 EASTLAKE· 25,912 sq ft · EUI 40.9 kBtu/ft²
- Building O, 655 S ORCAS ST· 25,872 sq ft · EUI 38.2 kBtu/ft²
- Building P, 5700 6TH AVE S· 25,872 sq ft · score 58 (C)
- Canal Building· 25,859 sq ft · score 76 (B)
- Jewish Family Service· 25,834 sq ft
- Seattle City Light Technical Metering Operations· 25,658 sq ft · score 54 (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 Belltown Center's energy grade?
Belltown Center scores 70 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 Belltown Center use?
Its 2025 site energy-use intensity was 70.0 kBtu/ft² (130.8 kBtu/ft² source) across 25,920 sq ft, including 229,907 kWh of electricity and 8,963 therms of natural gas.
What are Belltown Center's carbon emissions?
Belltown Center reported 51 tCO₂e of greenhouse-gas emissions (2.1 kgCO₂e/ft²) for 2025.
Where is Belltown Center?
Belltown Center is at 2106 2ND AVE, in Seattle, Washington 98121. Its coordinates are 47.61302, -122.34316 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Belltown Center and when was it built?
Belltown Center has 25,920 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1919 as its year built. It is classed as office.
Is Belltown Center 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, “Belltown Center, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/belltown-center-1852a650 (data as of October 2, 2026).