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Jurisdiction directory

California home project permits by county

Many California households live outside city limits, where the county building department — not a city — issues the permit. 22 California counties, covering the state's largest jurisdictions, are inventoried here.

Verified August 2026

Counties covered

22

largest jurisdictions first

Municipalities tracked

36

in California

Population covered

34.7M

residents in listed counties

Code basis

Statewide

California Residential Code (Title 24, Part 2.5) plus the Title 24 energy standards

Highest-priority markets

Ranked by population, regulatory complexity, home-rule authority and municipal density.

Los Angeles County9,663,345 residents · priority 82.8Orange County3,151,184 residents · priority 82.1San Diego County3,269,973 residents · priority 80.8Riverside County2,473,000 residents · priority 79.5San Bernardino County2,189,000 residents · priority 79.4Santa Clara County1,877,592 residents · priority 77.3Alameda County1,622,188 residents · priority 77.1Sacramento County1,585,055 residents · priority 77Contra Costa County1,156,555 residents · priority 74.6Fresno County1,015,190 residents · priority 73.8Ventura County829,590 residents · priority 73.4Kern County913,820 residents · priority 73.2San Francisco County808,437 residents · priority 72.6San Joaquin County789,410 residents · priority 72.4Stanislaus County552,999 residents · priority 70.4Sonoma County482,404 residents · priority 69.7Tulare County477,054 residents · priority 69.6Solano County451,716 residents · priority 69.3Santa Barbara County444,500 residents · priority 69.2Placer County412,300 residents · priority 68.8

All California counties we cover

22 counties, largest first.

Los Angeles CountySeat: Los Angeles · 9,663,345 residentsSan Diego CountySeat: San Diego · 3,269,973 residentsOrange CountySeat: Santa Ana · 3,151,184 residentsRiverside CountySeat: Riverside · 2,473,000 residentsSan Bernardino CountySeat: San Bernardino · 2,189,000 residentsSanta Clara CountySeat: San Jose · 1,877,592 residentsAlameda CountySeat: Oakland · 1,622,188 residentsSacramento CountySeat: Sacramento · 1,585,055 residentsContra Costa CountySeat: Martinez · 1,156,555 residentsFresno CountySeat: Fresno · 1,015,190 residentsKern CountySeat: Bakersfield · 913,820 residentsVentura CountySeat: Ventura · 829,590 residentsSan Francisco CountySeat: San Francisco · 808,437 residentsSan Joaquin CountySeat: Stockton · 789,410 residentsStanislaus CountySeat: Modesto · 552,999 residentsSonoma CountySeat: Santa Rosa · 482,404 residentsTulare CountySeat: Visalia · 477,054 residentsSolano CountySeat: Fairfield · 451,716 residentsSanta Barbara CountySeat: Santa Barbara · 444,500 residentsPlacer CountySeat: Auburn · 412,300 residentsSan Luis Obispo CountySeat: San Luis Obispo · 281,401 residentsMonterey CountySeat: Salinas · 224,000 residents

Sources

Sources & verification

Last verified August 2026. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing — they are not quotes. Permit rules change; confirm with the building department before starting work.