340 Bonair Siding - Demo'D
Office in California, CA · 340 Bonair Siding Road, Stanford · 94305
At a glance
340 Bonair Siding - Demo'D is a 71,603-square-foot office building at 340 Bonair Siding Road, Stanford in Stanford, California, built in 1962. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 100 out of 100 (grade A), a site energy-use intensity of 9.9 kBtu/ft² and 40 tCO₂e of greenhouse-gas emissions. That score is higher than 91% of the 4,912 scored office buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 100 (band A) |
| Site EUI | 9.9 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 40 tCO₂e |
| GHG intensity | 0.6 kgCO₂e/ft² |
| Electricity | 207,074 kWh |
| Gross floor area | 71,603 sq ft |
| Source record | california:10924557:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 100 | +3 | 9.9 kBtu/ft² | 40 tCO₂e |
| 2023 | 97 | -1 | 21.4 kBtu/ft² | 109 tCO₂e |
| 2022 | 98 | ±0 | 20.7 kBtu/ft² | 101 tCO₂e |
| 2021 | 98 | -1 | 18.6 kBtu/ft² | 81 tCO₂e |
| 2020 | 99 | +3 | 15.8 kBtu/ft² | 75 tCO₂e |
| 2019 | 96 | 31.0 kBtu/ft² | 147 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
- 340 Bonair Siding Road, Stanford
- City
- California
- State
- California
- ZIP
- 94305
- Coordinates
- 37.42931, -122.15836
Within ~1 km
Nearby benchmarked buildings
- Evgr Ascore 95
Residence Hall/Dormitory · 552,927 sq ft
- Evgr Bscore 84
Residence Hall/Dormitory · 487,928 sq ft
- Evgr Cscore 93
Residence Hall/Dormitory · 470,593 sq ft
- Wilbur Field Garagescore —
Parking · 403,414 sq ft
Parking · 322,273 sq ft
- Evgr Dscore 84
Residence Hall/Dormitory · 313,133 sq ft
See also: most efficient in California · biggest emitters
How does 340 Bonair Siding - Demo'D compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 340 Bonair Siding - Demo'D's ENERGY STAR score of 100 compares with an average of 75 across the 4,912 that report a score; it scores higher than 91% of them. Its site EUI of 9.9 kBtu/ft² is about 82% below the average of 56.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.6 kgCO₂e/ft² is about 84% below the group average of 3.6 kgCO₂e/ft².
At 71,603 sq ft, it is about half of the average floor area of 151,937 sq ft for those buildings. It was built in 1962, 23 years earlier 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 340 Bonair Siding - Demo'D's energy performance changed over time?
BuildingCensus holds 6 California disclosures for 340 Bonair Siding - Demo'D, covering report years 2019–2024. Its ENERGY STAR score went from 96 in 2019 to 100 in 2024 (+4 points). Site EUI moved from 31.0 kBtu/ft² (2019) to 9.9 kBtu/ft² (2024), a 68% decrease. Reported emissions went from 147 tCO₂e to 40 tCO₂e over the same span (down 72%).
What does an ENERGY STAR score of 100 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: 100 is the top of the scale. BuildingCensus bands the score into report-card grades; 100 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 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. 340 Bonair Siding - Demo'D's 9.9 kBtu/ft² across 71,603 sq ft works out to about 0.7 billion Btu (208 MWh-equivalent) in 2024. The disclosure also reports 207,074 kWh of electricity for the year.
Which law requires 340 Bonair Siding - Demo'D to report its energy use?
340 Bonair Siding - Demo'D 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 2024 disclosure (source record california:10924557:2024). 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
- San Mateo Gateway - 1820 Gateway· 71,594 sq ft · EUI 31.0 kBtu/ft²
- 1100 Investment· 71,516 sq ft · score 100 (A)
- 10330 - Building 2· 71,513 sq ft · score 65 (C)
- Mission Road Administration· 71,511 sq ft · score 83 (B)
- Santa Anita Ycoe Administration· 71,491 sq ft · score 88 (A)
- Development Center - Fremont· 71,460 sq ft · score 69 (C)
- 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 340 Bonair Siding - Demo'D's energy grade?
340 Bonair Siding - Demo'D scores 100 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 340 Bonair Siding - Demo'D use?
Its 2024 site energy-use intensity was 9.9 kBtu/ft² across 71,603 sq ft, including 207,074 kWh of electricity.
What are 340 Bonair Siding - Demo'D's carbon emissions?
340 Bonair Siding - Demo'D reported 40 tCO₂e of greenhouse-gas emissions (0.6 kgCO₂e/ft²) for 2024.
Where is 340 Bonair Siding - Demo'D?
340 Bonair Siding - Demo'D is at 340 Bonair Siding Road, Stanford, in Stanford, California 94305. Its coordinates are 37.42931, -122.15836 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 340 Bonair Siding - Demo'D and when was it built?
340 Bonair Siding - Demo'D has 71,603 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1962 as its year built. It is classed as office.
Is 340 Bonair Siding - Demo'D covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2024 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, “340 Bonair Siding - Demo'D, Stanford, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/340-bonair-siding-demo-d-f4d66469 (data as of July 9, 2026).