Thornton Place (Parent Property)

How does Thornton Place (Parent Property) 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. Thornton Place (Parent Property)'s ENERGY STAR score of 61 compares with an average of 83 across the 1,652 that report a score; it scores higher than 13% of them and lower than 87%. Its site EUI of 37.2 kBtu/ft² is roughly in line with the average of 34.9 kBtu/ft². Its emissions intensity of 0.9 kgCO₂e/ft² is about 23% above the group average of 0.7 kgCO₂e/ft².

At 771,253 sq ft, it is about 792% above the average floor area of 86,468 sq ft for those buildings. It was built in 2008, 25 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 Thornton Place (Parent Property)'s energy performance changed over time?

BuildingCensus holds 2 Seattle disclosures for Thornton Place (Parent Property), covering report years 2024–2025. Its ENERGY STAR score went from 74 in 2024 to 61 in 2025 (-13 points); its best year on file was 2024, at 74. Site EUI moved from 28.7 kBtu/ft² (2024) to 37.2 kBtu/ft² (2025), an 30% increase. Reported emissions went from 250 tCO₂e to 532 tCO₂e over the same span (up 113%).

What does an ENERGY STAR score of 61 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 61 means the building performs better than about 61% of its national peers. BuildingCensus bands the score into report-card grades; 61 falls in band C — below median (55–69). It sits 14 points below 75, the threshold for ENERGY STAR certification. 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. Thornton Place (Parent Property)'s 37.2 kBtu/ft² across 771,253 sq ft works out to about 28.7 billion Btu (8,408 MWh-equivalent) in 2025. Its source EUI of 79.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 4,226,916 kWh of electricity and 86,640 therms of natural gas for the year.

Which law requires Thornton Place (Parent Property) to report its energy use?

Thornton Place (Parent Property) 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:52046:2025). 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.