Hills Plaza I - 345 Spear Street
Office in California, CA · 345 Spear Street, San Francisco · 94105
At a glance
Hills Plaza I - 345 Spear Street is a 422,854-square-foot office building at 345 Spear Street, San Francisco in San Francisco, California, built in 1989. In its 2022 California benchmarking disclosure it reported an ENERGY STAR score of 77 out of 100 (grade B), a site energy-use intensity of 61.2 kBtu/ft² and 1,631 tCO₂e of greenhouse-gas emissions. That score is higher than 38% of the 4,912 scored office buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2022
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 77 (band B) |
| Site EUI | 61.2 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 1,631 tCO₂e |
| GHG intensity | 3.9 kgCO₂e/ft² |
| Electricity | 5,690,629 kWh |
| Natural gas | 103,491 therms |
| Gross floor area | 422,854 sq ft |
| Source record | california:1160068:2022 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2022latest | 77 | +3 | 61.2 kBtu/ft² | 1,631 tCO₂e |
| 2021 | 74 | -5 | 55.0 kBtu/ft² | 1,312 tCO₂e |
| 2020 | 79 | +19 | 52.0 kBtu/ft² | 1,333 tCO₂e |
| 2019 | 60 | -4 | 78.9 kBtu/ft² | 2,206 tCO₂e |
| 2018 | 64 | 68.3 kBtu/ft² | 1,916 tCO₂e |
Compliance context
AB 802 (Public Resources Code §25402.10)
AB 802 requires every California commercial building over 50,000 sq ft to report energy use to the CEC annually; the CEC publicly discloses the results statewide.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 345 Spear Street, San Francisco
- City
- California
- State
- California
- ZIP
- 94105
- Coordinates
- 37.78989, -122.39064
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Hills Plaza I - 345 Spear Street compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. Hills Plaza I - 345 Spear Street's ENERGY STAR score of 77 compares with an average of 75 across the 4,912 that report a score; it scores higher than 38% of them and lower than 61%. Its site EUI of 61.2 kBtu/ft² is roughly in line with the average of 56.4 kBtu/ft². Its emissions intensity of 3.9 kgCO₂e/ft² is roughly in line with the group average of 3.6 kgCO₂e/ft².
At 422,854 sq ft, it is about 178% above the average floor area of 151,937 sq ft for those buildings. It was built in 1989, 4 years later than the group's average year built (1985). 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 Hills Plaza I - 345 Spear Street's energy performance changed over time?
BuildingCensus holds 5 California disclosures for Hills Plaza I - 345 Spear Street, covering report years 2018–2022. Its ENERGY STAR score went from 64 in 2018 to 77 in 2022 (+13 points); its best year on file was 2020, at 79. Site EUI moved from 68.3 kBtu/ft² (2018) to 61.2 kBtu/ft² (2022), a 10% decrease. Reported emissions went from 1,916 tCO₂e to 1,631 tCO₂e over the same span (down 15%).
What does an ENERGY STAR score of 77 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 77 means the building performs better than about 77% of its national peers. BuildingCensus bands the score into report-card grades; 77 falls in band B — above median (70–84). 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 California, 65% 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. Hills Plaza I - 345 Spear Street's 61.2 kBtu/ft² across 422,854 sq ft works out to about 25.9 billion Btu (7,584 MWh-equivalent) in 2022. The disclosure also reports 5,690,629 kWh of electricity and 103,491 therms of natural gas for the year.
Which law requires Hills Plaza I - 345 Spear Street to report its energy use?
Hills Plaza I - 345 Spear Street reports under AB 802 (Public Resources Code §25402.10), the legal basis of California's Building Energy Benchmarking Program (statewide), which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2022 disclosure (source record california:1160068:2022). AB 802 requires every California commercial building over 50,000 sq ft to report energy use to the CEC annually; the CEC publicly discloses the results statewide.
More office buildings in California
- Pinnacle I· 422,651 sq ft · score 88 (A)
- Trans Pacific Centre· 421,992 sq ft · score 100 (A)
- Ca - San Francisco 211 Main· 421,010 sq ft · score 93 (A)
- One Park Plaza· 420,000 sq ft · score 28 (D)
- 100 Hooper St· 417,914 sq ft · score 95 (A)
- Public Works Building· 417,170 sq ft · score 80 (B)
- Office buildings in California· 6,214 benchmarked
- All California benchmarked buildings· AB 802 (Public Resources Code §25402.10)
- Most efficient large buildings in California
- Least efficient large buildings in California
- Biggest emitters in California
Frequently asked questions
What is Hills Plaza I - 345 Spear Street's energy grade?
Hills Plaza I - 345 Spear Street scores 77 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2022 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Hills Plaza I - 345 Spear Street use?
Its 2022 site energy-use intensity was 61.2 kBtu/ft² across 422,854 sq ft, including 5,690,629 kWh of electricity and 103,491 therms of natural gas.
What are Hills Plaza I - 345 Spear Street's carbon emissions?
Hills Plaza I - 345 Spear Street reported 1,631 tCO₂e of greenhouse-gas emissions (3.9 kgCO₂e/ft²) for 2022.
Where is Hills Plaza I - 345 Spear Street?
Hills Plaza I - 345 Spear Street is at 345 Spear Street, San Francisco, in San Francisco, California 94105. Its coordinates are 37.78989, -122.39064 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Hills Plaza I - 345 Spear Street and when was it built?
Hills Plaza I - 345 Spear Street has 422,854 sq ft of gross floor area, as reported in its 2022 disclosure. The disclosure lists 1989 as its year built. It is classed as office.
Is Hills Plaza I - 345 Spear Street covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2022 Building Energy Benchmarking Program (statewide) disclosure, which lists the buildings reporting under AB 802 (Public Resources Code §25402.10).
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About this data
Source: Building Energy Benchmarking Program (statewide) (AB 802 (Public Resources Code §25402.10)), as published July 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “Hills Plaza I - 345 Spear Street, San Francisco, California — 2022 benchmarking disclosure”, https://buildingcensus.com/buildings/california/hills-plaza-i-345-spear-street-83fcd157 (data as of July 9, 2026).