Research
Original data studies on the homes we work on in Sacramento, the foothills and the Bay Area, built from public datasets.
Every figure in these studies comes from a public dataset, named with its date on the page, and is computed by a script we keep with the site’s code. Each study has a downloadable CSV you are free to reuse with credit (CC BY 4.0). We check headline numbers a second time against the publisher’s own figures before we publish.
Studies
Wildfire
64.6%
of El Dorado County’s 100,466 buildings are directly exposed to wildfire; Placer 36.1%, Sacramento 10.2%.
Wildfire Exposure of Homes in Sacramento, Placer and El Dorado Counties
Read the study →Housing age
43.8%
of the 872,304 homes in Sacramento, Placer and El Dorado counties were built before 1980; Sacramento County 48.4%, Placer 28.1%.
How Old Are the Homes in Sacramento, Placer and El Dorado Counties?
Read the study →Statistics
31.35¢
per kilowatt-hour, California’s average home electricity price in 2025 (82% above the US), plus sourced figures on wildfire, housing age and window rules.
Northern California Siding and Window Statistics
See the statistics →Data sources
- USDA Forest Service, Wildfire Risk to Communities (April 2026 release)
- U.S. Census Bureau, American Community Survey 2020–2024 (tables B25034, B25035)
- California Energy Commission, 2025 Building Energy Efficiency Standards
- U.S. Energy Information Administration, Electric Power Annual and Electric Power Monthly
Questions about the data
Journalists and researchers can reach us through our contact page. If you find an error, tell us and we will correct the page and note the change.
Planning a siding or window project?
Talk to a Heritage Exteriors estimator about your home in Sacramento, the foothills, Lake Tahoe or the Bay Area.
Request a Free Estimate →Or call (916) 546-2991