Cannon House Retirement & Assisted Living (Sea Mar)

How does Cannon House Retirement & Assisted Living (Sea Mar) compare with other senior living community buildings in Seattle?

The latest disclosures cover 48 senior living community buildings in Seattle, out of 3,871 buildings citywide. Cannon House Retirement & Assisted Living (Sea Mar)'s ENERGY STAR score of 88 compares with an average of 72 across the 40 that report a score; it scores higher than 55% of them and lower than 43%. Its site EUI of 28.9 kBtu/ft² is about 57% below the average of 66.7 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.2 kgCO₂e/ft² is about 90% below the group average of 1.7 kgCO₂e/ft².

At 94,370 sq ft, it is about 31% below the average floor area of 136,458 sq ft for those buildings. It was built in 2001, 10 years later than the group's average year built (1991). Across all 24 jurisdictions BuildingCensus covers, the 1,181 senior living community buildings average an ENERGY STAR score of 71 and a site EUI of 73.6 kBtu/ft².

How has Cannon House Retirement & Assisted Living (Sea Mar)'s energy performance changed over time?

BuildingCensus holds 11 Seattle disclosures for Cannon House Retirement & Assisted Living (Sea Mar), covering report years 2015–2025. Its ENERGY STAR score went from 54 in 2015 to 88 in 2025 (+34 points); its best year on file was 2023, at 90. Site EUI moved from 51.5 kBtu/ft² (2015) to 28.9 kBtu/ft² (2025), a 44% decrease. Reported emissions went from 122 tCO₂e to 16 tCO₂e over the same span (down 87%).

What does an ENERGY STAR score of 88 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 88 means the building performs better than about 88% of its national peers. BuildingCensus bands the score into report-card grades; 88 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. Cannon House Retirement & Assisted Living (Sea Mar)'s 28.9 kBtu/ft² across 94,370 sq ft works out to about 2.7 billion Btu (799 MWh-equivalent) in 2025. Its source EUI of 80.9 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 799,360 kWh of electricity for the year.

Which law requires Cannon House Retirement & Assisted Living (Sea Mar) to report its energy use?

Cannon House Retirement & Assisted Living (Sea Mar) 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:24888:2025). 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.