Westlake Terry West Bldg

How does Westlake Terry West Bldg compare with other office buildings in Seattle?

The latest disclosures cover 497 office buildings in Seattle, out of 3,871 buildings citywide. Westlake Terry West Bldg's ENERGY STAR score of 94 compares with an average of 76 across the 378 that report a score; it scores higher than 81% of them and lower than 16%. Its site EUI of 42.1 kBtu/ft² is roughly in line with the average of 44.8 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.3 kgCO₂e/ft² is about 61% below the group average of 0.7 kgCO₂e/ft².

At 303,103 sq ft, it is about 54% above the average floor area of 196,452 sq ft for those buildings. It was built in 2006, 41 years later than the group's average year built (1965). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².

How has Westlake Terry West Bldg's energy performance changed over time?

BuildingCensus holds 11 Seattle disclosures for Westlake Terry West Bldg, covering report years 2015–2025. Its ENERGY STAR score was 94 in both 2015 and 2025. Site EUI moved from 47.1 kBtu/ft² (2015) to 42.1 kBtu/ft² (2025), a 11% decrease. Reported emissions went from 66 tCO₂e to 50 tCO₂e over the same span (down 23%).

What does an ENERGY STAR score of 94 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 94 means the building performs better than about 94% of its national peers. BuildingCensus bands the score into report-card grades; 94 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. Westlake Terry West Bldg's 42.1 kBtu/ft² across 303,103 sq ft works out to about 12.8 billion Btu (3,740 MWh-equivalent) in 2025. Its source EUI of 116.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,244,834 kWh of electricity and 1,227 therms of natural gas for the year.

Which law requires Westlake Terry West Bldg to report its energy use?

Westlake Terry West Bldg 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:482:2025). 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.