In California
Built in California, for California shops.
SWITCHBOARD was built inside a working plumbing shop in Santa Maria, California. These pages cover 25 California cities trade by trade: the climate zone, the utilities, the permit office, how many active licenses the Contractors State License Board lists there, and what the calls look like through the year.
Each link opens that trade in that city. The number is how many licenses in that classification the CSLB lists in good standing with a mailing address in the city (License Master file, November 2026).
| City | Plumbing (C-36) | HVAC (C-20) | Electrical (C-10) | Roofing (C-39) | General contractors (B) |
|---|---|---|---|---|---|
| Anaheim | 182 | 153 | 256 | 64 | 810 |
| Bakersfield | 181 | 166 | 353 | 67 | 950 |
| Chula Vista | 128 | 58 | 109 | 12 | 409 |
| Fremont | 33 | 25 | 95 | 21 | 366 |
| Fresno | 135 | 165 | 271 | 87 | 901 |
| Irvine | 86 | 67 | 197 | 23 | 793 |
| Long Beach | 145 | 70 | 198 | 38 | 662 |
| Los Angeles | 649 | 265 | 937 | 164 | 3,405 |
| Modesto | 84 | 83 | 129 | 40 | 428 |
| Oakland | 121 | 50 | 180 | 51 | 818 |
| Oxnard | 79 | 34 | 67 | 52 | 292 |
| Riverside | 206 | 201 | 338 | 68 | 916 |
| Sacramento | 242 | 243 | 481 | 114 | 1,564 |
| Salinas | 79 | 21 | 108 | 40 | 322 |
| San Bernardino | 58 | 52 | 83 | 34 | 274 |
| San Diego | 486 | 239 | 591 | 100 | 2,673 |
| San Francisco | 440 | 99 | 565 | 77 | 2,278 |
| San Jose | 374 | 268 | 581 | 129 | 2,202 |
| San Luis Obispo | 26 | 8 | 47 | 6 | 234 |
| Santa Ana | 102 | 55 | 139 | 57 | 548 |
| Santa Barbara | 105 | 27 | 106 | 29 | 566 |
| Santa Maria | 59 | 22 | 64 | 30 | 265 |
| Santa Rosa | 139 | 77 | 196 | 41 | 844 |
| Stockton | 82 | 90 | 130 | 40 | 439 |
| Ventura | 92 | 27 | 128 | 26 | 403 |