Plymouth Place
Multifamily Housing in Seattle, WA · 3101 1ST AVE · 98121
At a glance
Plymouth Place is a 41,359-square-foot multifamily housing building at 3101 1ST AVE in Seattle, Washington, built in 2002. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 83.8 kBtu/ft² and 126 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 83.8 kBtu/ft² |
| Source EUI | 139.1 kBtu/ft² |
| GHG emissions | 126 tCO₂e |
| GHG intensity | 3.1 kgCO₂e/ft² |
| Electricity | 353,767 kWh |
| Natural gas | 22,597 therms |
| Gross floor area | 41,359 sq ft |
| Source record | seattle:19904:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 83.8 kBtu/ft² | 126 tCO₂e | |
| 2024 | — | 82.8 kBtu/ft² | 124 tCO₂e | |
| 2023 | — | 84.9 kBtu/ft² | 118 tCO₂e | |
| 2022 | — | 85.6 kBtu/ft² | 124 tCO₂e | |
| 2021 | — | 76.1 kBtu/ft² | 105 tCO₂e | |
| 2020 | — | 83.1 kBtu/ft² | 118 tCO₂e | |
| 2019 | — | 76.5 kBtu/ft² | 110 tCO₂e | |
| 2018 | — | 70.9 kBtu/ft² | 102 tCO₂e | |
| 2017 | — | 78.3 kBtu/ft² | 115 tCO₂e | |
| 2016 | — | 72.6 kBtu/ft² | 99 tCO₂e | |
| 2015 | — | 66.0 kBtu/ft² | 88 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.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 3101 1ST AVE
- City
- Seattle
- State
- Washington
- ZIP
- 98121
- Coordinates
- 47.61838, -122.35571
Within ~1 km
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See also: most efficient in Seattle · biggest emitters
How does Plymouth Place 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 83.8 kBtu/ft² is about 140% above the average of 34.9 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 3.1 kgCO₂e/ft² is about 337% above the group average of 0.7 kgCO₂e/ft².
At 41,359 sq ft, it is about half of the average floor area of 86,468 sq ft for those buildings. It was built in 2002, 19 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 Plymouth Place's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Plymouth Place, covering report years 2015–2025. Site EUI moved from 66.0 kBtu/ft² (2015) to 83.8 kBtu/ft² (2025), an 27% increase. Reported emissions went from 88 tCO₂e to 126 tCO₂e over the same span (up 45%).
What does a site EUI of 83.8 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. Plymouth Place's 83.8 kBtu/ft² across 41,359 sq ft works out to about 3.5 billion Btu (1,016 MWh-equivalent) in 2025. Its source EUI of 139.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 353,767 kWh of electricity and 22,597 therms of natural gas for the year.
Which law requires Plymouth Place to report its energy use?
Plymouth Place 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:19904:2025). 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
- Bergan Place· 41,332 sq ft · score 87 (A)
- Cobrizo Condominium· 41,316 sq ft · score 98 (A)
- Sausalito Condominium· 41,310 sq ft · score 79 (B)
- Plaid Apartments· 41,297 sq ft · score 89 (A)
- Viceroy Apts· 41,241 sq ft · score 92 (A)
- Luminaire· 41,149 sq ft
- 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 Plymouth Place's energy grade?
Plymouth Place did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 83.8 kBtu/ft².
How much energy does Plymouth Place use?
Its 2025 site energy-use intensity was 83.8 kBtu/ft² (139.1 kBtu/ft² source) across 41,359 sq ft, including 353,767 kWh of electricity and 22,597 therms of natural gas.
What are Plymouth Place's carbon emissions?
Plymouth Place reported 126 tCO₂e of greenhouse-gas emissions (3.1 kgCO₂e/ft²) for 2025.
Where is Plymouth Place?
Plymouth Place is at 3101 1ST AVE, in Seattle, Washington 98121. Its coordinates are 47.61838, -122.35571 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Plymouth Place and when was it built?
Plymouth Place has 41,359 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 2002 as its year built. It is classed as multifamily housing.
Is Plymouth Place 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, “Plymouth Place, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/plymouth-place-067126dc (data as of October 2, 2026).