Mosaica Family Apartments

How does Mosaica Family Apartments compare with other mixed residential buildings in San Francisco?

The latest disclosures cover 610 mixed residential buildings in San Francisco, out of 2,509 buildings citywide. Mosaica Family Apartments's ENERGY STAR score of 93 compares with an average of 85 across the 340 that report a score; it scores higher than 42% of them and lower than 54%. Its site EUI of 24.5 kBtu/ft² is about 32% below the average of 36.0 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 1.3 kgCO₂e/ft² is about 33% below the group average of 2.0 kgCO₂e/ft².

At 248,893 sq ft, it is about 50% above the average floor area of 165,572 sq ft for those buildings. It was built in 2009, 43 years later than the group's average year built (1967).

How has Mosaica Family Apartments's energy performance changed over time?

BuildingCensus holds 8 San Francisco disclosures for Mosaica Family Apartments, covering report years 2018–2025. Its ENERGY STAR score went from 96 in 2018 to 93 in 2025 (-3 points); its best year on file was 2022, at 97. Site EUI moved from 24.9 kBtu/ft² (2018) to 24.5 kBtu/ft² (2025), a 2% decrease. Reported emissions went from 349 tCO₂e to 333 tCO₂e over the same span (down 4%).

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 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. Mosaica Family Apartments's 24.5 kBtu/ft² across 248,893 sq ft works out to about 6.1 billion Btu (1,787 MWh-equivalent) in 2025. Its source EUI of 42.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 692,974 kWh of electricity and 37,268 therms of natural gas for the year.

Which law requires Mosaica Family Apartments to report its energy use?

Mosaica Family Apartments 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:4021/002-A: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.