170 KING ST

How does 170 KING ST 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. 170 KING ST's ENERGY STAR score of 86 compares with an average of 85 across the 340 that report a score; it scores higher than 29% of them and lower than 68%. Its site EUI of 46.1 kBtu/ft² is about 28% above the average of 36.0 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 2.6 kgCO₂e/ft² is about 28% above the group average of 2.0 kgCO₂e/ft².

At 229,124 sq ft, it is about 38% above the average floor area of 165,572 sq ft for those buildings. It was built in 2007, 41 years later than the group's average year built (1967).

How has 170 KING ST's energy performance changed over time?

BuildingCensus holds 8 San Francisco disclosures for 170 KING ST, covering report years 2018–2025. Its ENERGY STAR score went from 74 in 2019 to 86 in 2025 (+12 points). Site EUI moved from 51.0 kBtu/ft² (2019) to 46.1 kBtu/ft² (2025), a 10% decrease. Reported emissions went from 523 tCO₂e to 413 tCO₂e over the same span (down 21%).

What does an ENERGY STAR score of 86 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 86 means the building performs better than about 86% of its national peers. BuildingCensus bands the score into report-card grades; 86 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. 170 KING ST's 46.1 kBtu/ft² across 229,124 sq ft works out to about 10.6 billion Btu (3,096 MWh-equivalent) in 2025. Its source EUI of 97.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,322,182 kWh of electricity and 29,233 therms of natural gas for the year.

Which law requires 170 KING ST to report its energy use?

170 KING ST 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:3794/077:2025). San Francisco's ordinance requires annual benchmarking for commercial buildings over 10,000 sq ft, with administrative penalties for buildings that fail to report.