Costa Mesa building permit report
3,114 building permits were issued in Costa Mesa, California over the last 12 months — including 571 reroofs, 439 remodels and additions, and 14 ADUs. Sourced from Costa Mesa's official permit portal.
Last updated November 02, 2026.
Month by month
| Month | All permits | Reroofs | Remodels & additions | ADUs | Pools & spas |
|---|---|---|---|---|---|
| Nov 2026 | 0 | 0 | 0 | 0 | 0 |
| Oct 2026 | 340 | 77 | 39 | 0 | 6 |
| Sep 2026 | 330 | 80 | 41 | 4 | 3 |
| Aug 2026 | 318 | 52 | 51 | 7 | 8 |
| Jul 2026 | 310 | 51 | 62 | 0 | 7 |
| Jun 2026 | 350 | 54 | 42 | 1 | 3 |
| May 2026 | 228 | 46 | 36 | 0 | 11 |
| Apr 2026 | 327 | 56 | 35 | 0 | 8 |
| Mar 2026 | 333 | 76 | 45 | 0 | 12 |
| Feb 2026 | 278 | 36 | 38 | 1 | 8 |
| Jan 2026 | 300 | 43 | 50 | 1 | 12 |
| Dec 2025 | 0 | 0 | 0 | 0 | 0 |
By work type
| Work type | Permits (12 mo) |
|---|---|
| Reroofs | 571 |
| Remodels & additions | 439 |
| ADUs | 14 |
| Pools & spas | 78 |
| Water heaters | 34 |
| Repipes | 11 |
| New construction | 58 |
Common questions about Costa Mesa permits
How many homes in Costa Mesa replaced their roof this year?
571 reroof permits were issued in Costa Mesa in the last 12 months. Each one is a home whose roof — a major factor in what a homeowners policy costs and whether a carrier will write it at all — was replaced on a specific, documented date.
How many ADUs were permitted in Costa Mesa?
14 accessory dwelling unit permits were issued over the last 12 months.
Are these numbers official?
They're compiled directly from Costa Mesa's own permit system — the same public records the city publishes — normalized and categorized by work type, refreshed nightly.
Other California cities
Work these permits. OneForm turns any of these lists into print-ready postcards with per-address QR tracking, under your own name and license number — so you know which addresses responded.
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