Siena Del Lago Condominium
Multifamily Housing in Seattle, WA · 2059 MINOR AVE E · 98102
At a glance
Siena Del Lago Condominium is a 21,643-square-foot multifamily housing building at 2059 MINOR AVE E in Seattle, Washington, built in 1989. In its 2025 Seattle benchmarking disclosure it reported a site energy-use intensity of 51.7 kBtu/ft² and 44 tCO₂e of greenhouse-gas emissions.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 51.7 kBtu/ft² |
| Source EUI | 80.2 kBtu/ft² |
| GHG emissions | 44 tCO₂e |
| GHG intensity | 2.0 kgCO₂e/ft² |
| Electricity | 93,637 kWh |
| Natural gas | 8,005 therms |
| Gross floor area | 21,643 sq ft |
| Source record | seattle:23658:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 51.7 kBtu/ft² | 44 tCO₂e | |
| 2024 | — | 49.4 kBtu/ft² | 42 tCO₂e | |
| 2023 | — | 47.7 kBtu/ft² | 41 tCO₂e | |
| 2022 | — | 54.5 kBtu/ft² | 48 tCO₂e | |
| 2021 | — | 53.3 kBtu/ft² | 46 tCO₂e | |
| 2020 | — | 44.8 kBtu/ft² | 38 tCO₂e | |
| 2019 | — | 43.5 kBtu/ft² | 37 tCO₂e | |
| 2018 | — | 44.4 kBtu/ft² | 39 tCO₂e | |
| 2017 | — | 47.1 kBtu/ft² | 42 tCO₂e | |
| 2016 | — | 43.6 kBtu/ft² | 37 tCO₂e | |
| 2015 | — | 44.0 kBtu/ft² | 39 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
- 2059 MINOR AVE E
- City
- Seattle
- State
- Washington
- ZIP
- 98102
- Coordinates
- 47.63794, -122.32867
Within ~1 km
Nearby benchmarked buildings
- 1150 Eastlakescore —
Mixed Use Property · 444,757 sq ft
- Equinoxscore 98
Multifamily Housing · 322,771 sq ft
- 188 East Blainescore —
Laboratory · 310,584 sq ft
- 1616 Eastlake Buildingscore —
Laboratory · 281,306 sq ft
- Liza Eastlakescore 99
Multifamily Housing · 207,034 sq ft
Laboratory · 175,918 sq ft
See also: most efficient in Seattle · biggest emitters
How does Siena Del Lago Condominium 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 51.7 kBtu/ft² is about 48% 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 2.0 kgCO₂e/ft² is about 191% above the group average of 0.7 kgCO₂e/ft².
At 21,643 sq ft, it is about 75% below the average floor area of 86,468 sq ft for those buildings. It was built in 1989, 6 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 Siena Del Lago Condominium's energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Siena Del Lago Condominium, covering report years 2015–2025. Site EUI moved from 44.0 kBtu/ft² (2015) to 51.7 kBtu/ft² (2025), an 18% increase. Reported emissions went from 39 tCO₂e to 44 tCO₂e over the same span (up 13%).
What does a site EUI of 51.7 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. Siena Del Lago Condominium's 51.7 kBtu/ft² across 21,643 sq ft works out to about 1.1 billion Btu (328 MWh-equivalent) in 2025. Its source EUI of 80.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 93,637 kWh of electricity and 8,005 therms of natural gas for the year.
Which law requires Siena Del Lago Condominium to report its energy use?
Siena Del Lago Condominium 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:23658:2025). 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
- Valley Commons· 21,640 sq ft · score 91 (A)
- Tara Apts· 21,608 sq ft · score 90 (A)
- Towne Vue Manor· 21,602 sq ft · score 94 (A)
- College Park West Condominium· 21,600 sq ft · score 89 (A)
- West Point Place Condominium· 21,581 sq ft · EUI 19.4 kBtu/ft²
- 22 Unit Apartment· 21,580 sq ft · score 89 (A)
- 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 Siena Del Lago Condominium's energy grade?
Siena Del Lago Condominium did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 51.7 kBtu/ft².
How much energy does Siena Del Lago Condominium use?
Its 2025 site energy-use intensity was 51.7 kBtu/ft² (80.2 kBtu/ft² source) across 21,643 sq ft, including 93,637 kWh of electricity and 8,005 therms of natural gas.
What are Siena Del Lago Condominium's carbon emissions?
Siena Del Lago Condominium reported 44 tCO₂e of greenhouse-gas emissions (2.0 kgCO₂e/ft²) for 2025.
Where is Siena Del Lago Condominium?
Siena Del Lago Condominium is at 2059 MINOR AVE E, in Seattle, Washington 98102. Its coordinates are 47.63794, -122.32867 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Siena Del Lago Condominium and when was it built?
Siena Del Lago Condominium has 21,643 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1989 as its year built. It is classed as multifamily housing.
Is Siena Del Lago Condominium 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).
Working with Seattle building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Siena Del Lago Condominium, Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/siena-del-lago-condominium-204b92ff (data as of October 2, 2026).