Capco Plaza (Altamira + Qfc Etc.)
Mixed Use Property in Seattle, WA · 4550 42ND AVE SW · 98116
At a glance
Capco Plaza (Altamira + Qfc Etc.) is a 177,417-square-foot mixed use property building at 4550 42ND AVE SW in Seattle, Washington, built in 2008. In its 2025 Seattle benchmarking disclosure it reported an ENERGY STAR score of 93 out of 100 (grade A), a site energy-use intensity of 60.8 kBtu/ft² and 191 tCO₂e of greenhouse-gas emissions. That score is higher than 76% of the 29 scored mixed use property buildings in Seattle.
Seattle Energy Benchmarking Ordinance (SMC 22.920) · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 93 (band A) |
| Site EUI | 60.8 kBtu/ft² |
| Source EUI | 143.0 kBtu/ft² |
| GHG emissions | 191 tCO₂e |
| GHG intensity | 1.1 kgCO₂e/ft² |
| Electricity | 2,352,905 kWh |
| Natural gas | 27,604 therms |
| Gross floor area | 177,417 sq ft |
| Source record | seattle:20432:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 93 | +1 | 60.8 kBtu/ft² | 191 tCO₂e |
| 2024 | 92 | ±0 | 61.8 kBtu/ft² | 195 tCO₂e |
| 2023 | 92 | ±0 | 61.6 kBtu/ft² | 193 tCO₂e |
| 2022 | 92 | -1 | 63.5 kBtu/ft² | 213 tCO₂e |
| 2021 | 93 | 61.5 kBtu/ft² | 199 tCO₂e | |
| 2020 | — | — | 87 tCO₂e | |
| 2019 | 66 | +18 | 68.0 kBtu/ft² | 160 tCO₂e |
| 2018 | 48 | +16 | 78.7 kBtu/ft² | 166 tCO₂e |
| 2017 | 32 | +3 | 78.9 kBtu/ft² | 162 tCO₂e |
| 2016 | 29 | -4 | 80.8 kBtu/ft² | 173 tCO₂e |
| 2015 | 33 | 78.1 kBtu/ft² | 163 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
- 4550 42ND AVE SW
- City
- Seattle
- State
- Washington
- ZIP
- 98116
- Coordinates
- 47.56137, -122.38524
Within ~1 km
Nearby benchmarked buildings
Multifamily MR (5-9) · 649,605 sq ft
- Spruce West Seattlescore 61
Multifamily Housing · 409,825 sq ft
- Providence Mt St Vincentscore 44
Senior Living Community · 371,257 sq ft
- Maris Apartmentsscore 100
Multifamily Housing · 272,811 sq ft
- Junction 47score 84
Multifamily Housing · 271,922 sq ft
Supermarket/Grocery Store · 229,383 sq ft
See also: most efficient in Seattle · biggest emitters
How does Capco Plaza (Altamira + Qfc Etc.) compare with other mixed use property buildings in Seattle?
The latest disclosures cover 157 mixed use property buildings in Seattle, out of 3,871 buildings citywide. Capco Plaza (Altamira + Qfc Etc.)'s ENERGY STAR score of 93 compares with an average of 74 across the 29 that report a score; it scores higher than 76% of them and lower than 21%. Its site EUI of 60.8 kBtu/ft² is about 11% below the average of 68.7 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 1.1 kgCO₂e/ft² is about 23% below the group average of 1.4 kgCO₂e/ft².
At 177,417 sq ft, it is roughly in line with the average floor area of 165,352 sq ft for those buildings. It was built in 2008, 40 years later than the group's average year built (1968). Across all 24 jurisdictions BuildingCensus covers, the 1,212 mixed use property buildings average an ENERGY STAR score of 69 and a site EUI of 79.8 kBtu/ft².
How has Capco Plaza (Altamira + Qfc Etc.)'s energy performance changed over time?
BuildingCensus holds 11 Seattle disclosures for Capco Plaza (Altamira + Qfc Etc.), covering report years 2015–2025. Its ENERGY STAR score went from 33 in 2015 to 93 in 2025 (+60 points); its best year on file was 2021, at 93. Site EUI moved from 78.1 kBtu/ft² (2015) to 60.8 kBtu/ft² (2025), a 22% decrease. Reported emissions went from 163 tCO₂e to 191 tCO₂e over the same span (up 17%).
What does an ENERGY STAR score of 93 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 93 means the building performs better than about 93% of its national peers. BuildingCensus bands the score into report-card grades; 93 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. Capco Plaza (Altamira + Qfc Etc.)'s 60.8 kBtu/ft² across 177,417 sq ft works out to about 10.8 billion Btu (3,161 MWh-equivalent) in 2025. Its source EUI of 143.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,352,905 kWh of electricity and 27,604 therms of natural gas for the year.
Which law requires Capco Plaza (Altamira + Qfc Etc.) to report its energy use?
Capco Plaza (Altamira + Qfc Etc.) 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:20432:2025). 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 mixed use property buildings in Seattle
- 500 Fairview Research Center Ii· 167,201 sq ft · EUI 128.6 kBtu/ft²
- CITY WATCH APTS· 163,699 sq ft · score 85 (A)
- Seattle Biomedical Building· 159,700 sq ft · EUI 95.9 kBtu/ft²
- 12th Avenue Arts· 158,967 sq ft
- Airport Way Ctr - Bldg C· 145,158 sq ft · EUI 49.1 kBtu/ft²
- Cogir Queen Anne I· 145,085 sq ft · score 98 (A)
- Mixed Use Property buildings in Seattle· 157 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 Capco Plaza (Altamira + Qfc Etc.)'s energy grade?
Capco Plaza (Altamira + Qfc Etc.) scores 93 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 Capco Plaza (Altamira + Qfc Etc.) use?
Its 2025 site energy-use intensity was 60.8 kBtu/ft² (143.0 kBtu/ft² source) across 177,417 sq ft, including 2,352,905 kWh of electricity and 27,604 therms of natural gas.
What are Capco Plaza (Altamira + Qfc Etc.)'s carbon emissions?
Capco Plaza (Altamira + Qfc Etc.) reported 191 tCO₂e of greenhouse-gas emissions (1.1 kgCO₂e/ft²) for 2025.
Where is Capco Plaza (Altamira + Qfc Etc.)?
Capco Plaza (Altamira + Qfc Etc.) is at 4550 42ND AVE SW, in Seattle, Washington 98116. Its coordinates are 47.56137, -122.38524 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Capco Plaza (Altamira + Qfc Etc.) and when was it built?
Capco Plaza (Altamira + Qfc Etc.) has 177,417 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 2008 as its year built. It is classed as mixed use property.
Is Capco Plaza (Altamira + Qfc Etc.) 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, “Capco Plaza (Altamira + Qfc Etc.), Seattle, Washington — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/seattle/capco-plaza-altamira-qfc-etc-f9432dc4 (data as of October 2, 2026).