Decibel Apartments
Multifamily Housing in Seattle, WA · 301 12TH AVE · 98122
At a glance
Decibel Apartments is a 69,656-square-foot multifamily housing building at 301 12TH AVE in Seattle, Washington, built in 2016. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 21.1 kBtu/ft² and 33 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 21.1 kBtu/ft² |
| Source EUI | 44.2 kBtu/ft² |
| GHG emissions | 33 tCO₂e |
| GHG intensity | 0.5 kgCO₂e/ft² |
| Electricity | 233,753 kWh |
| Natural gas | 5,412 therms |
| Gross floor area | 69,656 sq ft |
| Source record | seattle:50268:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 21.1 kBtu/ft² | 33 tCO₂e | |
| 2024 | — | 24.8 kBtu/ft² | 43 tCO₂e | |
| 2023 | — | 22.2 kBtu/ft² | 34 tCO₂e | |
| 2022 | — | 13.3 kBtu/ft² | 27 tCO₂e | |
| 2021 | — | 14.0 kBtu/ft² | 27 tCO₂e | |
| 2020 | — | 22.1 kBtu/ft² | 41 tCO₂e | |
| 2019 | 100 | ±0 | 19.1 kBtu/ft² | 34 tCO₂e |
| 2018 | 100 | ±0 | 9.5 kBtu/ft² | 4 tCO₂e |
| 2017 | 100 | 18.8 kBtu/ft² | 44 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
- 301 12TH AVE
- City
- Seattle
- State
- Washington
- ZIP
- 98122
- Coordinates
- 47.60460, -122.31715
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does Decibel Apartments compare with other multifamily housing buildings in Seattle?
The latest disclosures cover 1,971 multifamily housing buildings in Seattle, out of 3,871 buildings citywide. Its site EUI of 21.1 kBtu/ft² is about 40% below the average of 34.9 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.5 kgCO₂e/ft² is about 26% below the group average of 0.7 kgCO₂e/ft².
At 69,656 sq ft, it is about 19% below the average floor area of 86,468 sq ft for those buildings. It was built in 2016, 33 years later than the group's average year built (1983). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².
How has Decibel Apartments's energy performance changed over time?
BuildingCensus holds 9 Seattle disclosures for Decibel Apartments, covering report years 2017–2025. Its ENERGY STAR score was 100 in both 2017 and 2019. Site EUI moved from 18.8 kBtu/ft² (2017) to 21.1 kBtu/ft² (2025), an 12% increase. Reported emissions went from 44 tCO₂e to 33 tCO₂e over the same span (down 25%).
What does a site EUI of 21.1 kBtu/ft² mean?
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. Decibel Apartments's 21.1 kBtu/ft² across 69,656 sq ft works out to about 1.5 billion Btu (431 MWh-equivalent) in 2025. Its source EUI of 44.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 233,753 kWh of electricity and 5,412 therms of natural gas for the year.
Which law requires Decibel Apartments to report its energy use?
Decibel Apartments 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:50268:2025). 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 multifamily housing buildings in Seattle
- The Vermont Inn· 69,590 sq ft · score 98 (A)
- Junction Flats· 69,511 sq ft · score 98 (A)
- Allegro 1 Apartments· 69,452 sq ft · score 99 (A)
- Roosevelt & 50th Apartments· 69,404 sq ft · EUI 28.6 kBtu/ft²
- Pike Lofts Condominium· 69,272 sq ft · EUI 40.5 kBtu/ft²
- The Gateway - King County- Northgate Housing· 69,138 sq ft · score 82 (B)
- Multifamily Housing buildings in Seattle· 1,971 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 Decibel Apartments's energy grade?
Decibel Apartments did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 21.1 kBtu/ft².
How much energy does Decibel Apartments use?
Its 2025 site energy-use intensity was 21.1 kBtu/ft² (44.2 kBtu/ft² source) across 69,656 sq ft, including 233,753 kWh of electricity and 5,412 therms of natural gas.
What are Decibel Apartments's carbon emissions?
Decibel Apartments reported 33 tCO₂e of greenhouse-gas emissions (0.5 kgCO₂e/ft²) for 2025.
Where is Decibel Apartments?
Decibel Apartments is at 301 12TH AVE, in Seattle, Washington 98122. Its coordinates are 47.60460, -122.31715 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Decibel Apartments and when was it built?
Decibel Apartments has 69,656 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 2016 as its year built. It is classed as multifamily housing.
Is Decibel Apartments 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, “Decibel Apartments, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/decibel-apartments-8849b53c (data as of October 2, 2026).