San Francisco Marriott Union Square

How does San Francisco Marriott Union Square compare with other commercial buildings in San Francisco?

The latest disclosures cover 1,683 commercial buildings in San Francisco, out of 2,509 buildings citywide. San Francisco Marriott Union Square's ENERGY STAR score of 62 compares with an average of 78 across the 790 that report a score; it scores higher than 18% of them and lower than 81%. Its site EUI of 108.9 kBtu/ft² is about 121% above the average of 49.2 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 5.9 kgCO₂e/ft² is about 120% above the group average of 2.7 kgCO₂e/ft².

At 348,000 sq ft, it is about 224% above the average floor area of 107,408 sq ft for those buildings. It was built in 1972, 31 years later than the group's average year built (1941). Across all 24 jurisdictions BuildingCensus covers, the 2,307 commercial buildings average an ENERGY STAR score of 76 and a site EUI of 51.3 kBtu/ft².

How has San Francisco Marriott Union Square's energy performance changed over time?

BuildingCensus holds 15 San Francisco disclosures for San Francisco Marriott Union Square, covering report years 2011–2025. Its ENERGY STAR score went from 33 in 2011 to 62 in 2025 (+29 points); its best year on file was 2022, at 72. Site EUI moved from 132.8 kBtu/ft² (2011) to 108.9 kBtu/ft² (2025), a 18% decrease. Reported emissions went from 2,664 tCO₂e to 1,801 tCO₂e over the same span (down 32%).

What does an ENERGY STAR score of 62 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 62 means the building performs better than about 62% of its national peers. BuildingCensus bands the score into report-card grades; 62 falls in band C — below median (55–69). It sits 13 points below 75, the threshold for ENERGY STAR certification. In San Francisco, 73% 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. San Francisco Marriott Union Square's 108.9 kBtu/ft² across 348,000 sq ft works out to about 37.9 billion Btu (11,107 MWh-equivalent) in 2025. Its source EUI of 182.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 3,445,281 kWh of electricity and 212,556 therms of natural gas for the year.

Which law requires San Francisco Marriott Union Square to report its energy use?

San Francisco Marriott Union Square reports under SF Environment Code Chapter 20, the legal basis of San Francisco's Existing Buildings Energy Performance Ordinance, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2025 disclosure (source record sf:0285/020:2025). San Francisco's ordinance requires annual benchmarking for commercial buildings over 10,000 sq ft, with administrative penalties for buildings that fail to report.