County building permit guide
Orange County, California building permits — complete guide (2026)
Orange County Development Services handles building and related permits for unincorporated Orange County and county-owned properties. Cities such as Anaheim, Irvine, Santa Ana, Huntington Beach, Fullerton, and Mission Viejo operate their own permit offices.
Avg cost: $150–$900+
Processing: 2–8+ weeks
~30K permits/yr
~3.2M residents
$150–$900+Avg permit cost
2–8+ weeksProcessing time
~30,000Permits/year
ADU-friendly; city-dependentADU-friendly
Ready to apply for your Orange County, California permit?
County services apply to unincorporated areas and county-owned properties. Cities maintain separate building departments.
Use OC Development Services permitting resources ↗
Orange County, California Building Department
Yes
OC Development Services — Building & Safety
(714) 667-8888
Mon–Fri business hours; verify current counter hours
601 N Ross St, Santa Ana, CA 92701
OC Development Services online permits
Do not assume the county issues your permit. Most Orange County addresses are inside incorporated cities. Coastal-zone, hillside, wildfire, and HOA/design-review rules may apply.
Permit fees — Orange County, California, 2026
| Permit type | Fee range | Processing | Notes |
|---|---|---|---|
| New Construction | $700–$3,000 | 4–10 weeks | CBC 2022; CalGreen; Coastal CDP for oceanfront lots |
| ADU | $250–$1,200 | 3–6 weeks | 60-day state window; Irvine and Anaheim have streamlined ADU process |
| Room Addition | $350–$1,600 | 3–7 weeks | Seismic requirements; HOA approval often required first |
| Pool | $350–$1,100 | 3–6 weeks | Barrier fence required; many OC HOAs add their own requirements |
| Roofing | $150–$450 | 1–2 weeks | Class A in fire areas; standard often same-day over-counter |
| Solar | $100–$300 | 1–2 weeks | SolarAPP+ in several OC cities; coastal permits may add review |
| Electrical | $100–$300 | 1–2 weeks | EV charger permits growing; panel upgrade fees vary by city |
| HVAC | $100–$280 | 1–2 weeks | Title 24 compliance; SEER2 requirements for replacements |
| Plumbing | $75–$225 | 1–2 weeks | Low-flow requirements; water softener permits in some cities |
| Fence | $75–$200 | 1–2 weeks | HOA restrictions often stricter; coastal view ordinances may limit height |
How to get a permit in Orange County, California
1
Find your building department
34 cities in OC, each with its own dept. Use OC GIS portal to confirm. Only unincorporated areas use OC Planning.
2
Check HOA requirements
OC has very high HOA penetration. Most projects need HOA architectural approval before permit application. Allow 2–6 weeks.
3
Coastal Commission check
Properties within ~1,000 ft of coast in Laguna Beach, Newport Beach, HB may require a Coastal Development Permit.
4
Submit application
Apply online through your city's portal. Simple permits often approved same-day or within 1–3 business days.
5
Plan review
Most OC cities complete residential reviews in 2–4 weeks. Expedited review available for a fee.
6
Schedule inspections
Online through city portal. Trade inspections typically available within 1–3 business days.
Jurisdictions within Orange County, California
Special zone requirements
Coastal Development Zone
Laguna Beach, Newport Beach, HB
CDP required for construction within ~1,000 ft of coast. Adds 2–6 months.
Very High Fire Hazard Zone
Laguna Hills, eastern hillsides
Chapter 7A fire-resistant materials required. Notable wildfire history.
HOA Architectural Control
Majority of county
Most planned communities require architectural committee approval before permit submittal. Allow 2–6 weeks.
Frequently asked questions — Orange County, California
Do I apply to OC or my city?
Almost always your city. Only unincorporated OC (~3% of residents) uses OC County Planning. All 34 OC cities have their own building departments.
ADU permitting in OC?
60-day approval mandated for ADUs under 850 sq ft. Most cities have pre-approved ADU programs. Check HOA CC&Rs — some HOAs prohibit secondary units despite state law.
Pool permit requirements?
Building permit plus electrical and gas sub-permits required. Safety barrier fence plan required. Many HOAs require board approval of pool design first.
Special rules for Laguna Beach?
Yes — strict design review, Coastal Zone CDP requirements, and historic neighborhood design board approval before building permit submission.
Official sources: OC Development Services / OC Public Works; 2025 California Building Standards Code; 2025 California Energy Code; U.S. Census BPS.