Plumbing Permit in Orange County, California
Permit required
Yes, a permit is required
Before starting any plumbing or drainage work in a building or on a property in unincorporated Orange County
By Mario Bailey, verified against official sources
Quick answer
Orange County adopted the 2025 California Plumbing Code by Ordinance No. 25-019 on November 4, 2025, and county code section 7-3-11 requires a permit from the Building Official before any plumbing or drainage work begins, with a separate permit for each building or structure. Section 7-3-12 exempts only repair work: clearing stoppages or repairing leaks in pipes, valves or fixtures where the repair does not involve replacing or rearranging valves, pipes or fixtures, and stopping leaks in drains, soil, waste or vent pipe. That second exemption has a sharp edge, since removing and replacing a defective trap, drain, soil, waste or vent pipe counts as new work and needs a permit. This applies to unincorporated Orange County only; the county's 34 incorporated cities run their own building departments.
Who is pulling this permit?
Apply yourself
Hire it out
Before you sign, ask the contractor:
- Who pulls the permit, you or me, and is the permit fee included in the bid?
- Which inspections will this job need, and who meets the inspector on site?
- Is your contractor license active in this locality, and under which business name?
When a permit is usually needed
Before starting any plumbing or drainage work in a building or on a property in unincorporated Orange County
What a plumbing permit costs in Orange County
How Orange County compares in California
No California jurisdiction we have verified sets a size threshold for this permit, so what actually differs between them is the fee.
| Jurisdiction | Permit needed? | Typical fee |
|---|---|---|
| Alameda County | Permit required | Building Inspection Department Service Fee Schedule (Schedule A, effective... |
| Contra Costa County | Permit required | Land Development Fee Schedule S-002 E.6, "Plumbing Permit (Other) $75.00... |
| Fresno County | Permit required | Section 2512 Plumbing Code Fees, FY 2026-27: Alteration, repair or addition of... |
| Los Angeles | Permit required | Itemized per fixture per LADBS Fee Sch.5 (7/2017), for example a toilet at $23... |
| Los Angeles County | Permit required | Plumbing Code Fee Schedule (Title 28 of the Los Angeles Code, Ord. |
| Orange Countythis page | Permit required | Plumbing Permit Application Flat Fee: $363 for FY 2024-25, $383 for FY... |
| Riverside County | Permit required | Residential Plumbing (BPL-RPLU): $274.30 fixed fee, per Appendix A to... |
How to apply in Orange County
You apply for a residential plumbing permit at your local building department by filing an application that describes the scope of work and site, along with construction documents, before any regulated plumbing installation, alteration, or repair begins. Minor repairs that do not touch piping or fixtures are generally exempt, and once issued the permit only stays valid if work is started within its time limit.
What most plumbing permit applications include:
- A permit is required before any owner or authorized agent constructs, alters, repairs, removes, converts, or replaces a plumbing system regulated by the code (IRC R105.1).
- The application must identify and describe the work, describe the site, state the intended use and occupancy, and be signed by the applicant or an authorized agent (IRC R105.3).
- Two or more sets of construction documents must accompany the application, drawn with enough clarity to show the location, nature, and extent of the proposed plumbing work and how it will conform to code (IRC R106.1, R106.1.1).
- Minor plumbing repairs, such as clearing a stoppage or removing and resetting a water closet without rearranging pipes or fixtures, are exempt from permit (IRC R105.2).
- Once issued, a permit is only valid for a limited window, commonly 180 days, and becomes invalid if the work is not started or is abandoned within that time, though extensions can be requested (IRC R105.3.2, R105.5).
General submittal guidance from 2021 International Residential Code (IRC), Chapter 1 Scope and Administration, Sections R105 Permits and R106 Construction Documents. Source. OC Public Works, OC Development Services (Building & Safety) sets the exact checklist for Orange County.
Where to apply in Orange County:
OC Public Works, OC Development Services (Building & Safety)
- 601 N. Ross Street, Santa Ana, CA 92701 (mailing: P.O. Box 4048, Santa Ana, CA 92702-4048)
- Phone: 714-667-8888
- Email: OCPWPermitting@ocpw.ocgov.com
Inspections and closing out your permit
Plumbing inspections are timed to whatever is about to hide the pipe: underground and under-slab piping is checked before concrete covers it, rough-in piping is pressure or water tested before walls close up, and a final inspection checks every fixture and backflow protection once the work is complete.
- Piping and equipment placed under a slab or floor must be in place and inspected before any concrete is poured or floor sheathing is installed over it (IRC R109.1.1.1).
- Rough plumbing, along with the mechanical, gas, and electrical rough-in, must be inspected prior to covering or concealment and before fixtures or appliances are set (IRC R109.1.2).
- Rough drain, waste, and vent (DWV) piping is tested with water, air, or (for plastic piping) a vacuum, and must show no evidence of leakage before it is closed in (IRC P2503.5.1).
- The water-distribution piping is tested and must hold tight under the system's working pressure, or under a 50 psi air test for non-plastic piping, before it is concealed (IRC P2503.7).
- The framing inspection cannot proceed until the plumbing rough inspection, along with the mechanical and electrical rough inspections, has been approved (IRC R109.1.4).
- At the final drainage test, each fixture is filled and then drained, and its traps and fixture connections must prove watertight by visual inspection (IRC P2503.5.2).
- Final inspection is made after all work required by the permit is complete, and includes confirming backflow protection, such as vacuum breakers on hose bibbs, is installed (IRC R109.1.6, P2902.4.3).
Schedule each inspection in advance and pass the final before you use the work or close the permit. Request inspections through the Orange County permit portal or by phone at 714-667-8888.
Inspection sequence from 2021 International Residential Code (IRC), Section R109 Inspections and Section P2503 Inspection and Tests. Source. An open permit left un-inspected can surface later in a title search or home sale.
Your Plumbing Permit checklist for Orange County
- Confirm the requirement. Yes, a permit is required. Usually needed: Before starting any plumbing or drainage work in a building or on a property in unincorporated Orange County.
- Budget the fee. Plumbing Permit Application Flat Fee: $363 for FY 2024-25, $383 for FY 2025-26, $391 for FY 2026-27, including all plumbing fixtures, toilets, disposals, rainwater drains, water piping, treatment or softening equipment, gas piping and outlets, re-pipes, tankless water heaters and grey water systems. Storage-Type Water Heater: $85 in all three fiscal years. Sewer Lateral Replacement: $264, $277 and $282. Private Sewage Disposal Systems, each septic: $1,450 time-and-materials deposit. Stand Alone plumbing permit for individual appliances: $178, $188 and $192. From the OC Development Services Fee Schedule 2024-2027, fees effective July 21, 2024. Official fee schedule.
- Apply. You apply for a residential plumbing permit at your local building department by filing an application that describes the scope of work and site, along with construction documents, before any regulated plumbing installation, alteration, or repair begins. Minor repairs that do not touch piping or fixtures are generally exempt, and once issued the permit only stays valid if work is started within its time limit. Start at the Orange County permit portal.
- Keep the office details handy. OC Public Works, OC Development Services (Building & Safety). Phone: 714-667-8888. Address: 601 N. Ross Street, Santa Ana, CA 92701 (mailing: P.O. Box 4048, Santa Ana, CA 92702-4048).
- Plan for inspections. Plumbing inspections are timed to whatever is about to hide the pipe: underground and under-slab piping is checked before concrete covers it, rough-in piping is pressure or water tested before walls close up, and a final inspection checks every fixture and backflow protection once the work is complete.
Compiled from the official sources on this page. Last checked .
Frequently asked questions
- Do you need a plumbing permit in Orange County?
- Orange County adopted the 2025 California Plumbing Code by Ordinance No. 25-019 on November 4, 2025, and county code section 7-3-11 requires a permit from the Building Official before any plumbing or drainage work begins, with a separate permit for each building or structure. Section 7-3-12 exempts only repair work: clearing stoppages or repairing leaks in pipes, valves or fixtures where the repair does not involve replacing or rearranging valves, pipes or fixtures, and stopping leaks in drains, soil, waste or vent pipe. That second exemption has a sharp edge, since removing and replacing a defective trap, drain, soil, waste or vent pipe counts as new work and needs a permit. This applies to unincorporated Orange County only; the county's 34 incorporated cities run their own building departments. Always confirm with the OC Public Works, OC Development Services (Building & Safety) before starting.
- How much does a plumbing permit cost in Orange County?
- Plumbing Permit Application Flat Fee: $363 for FY 2024-25, $383 for FY 2025-26, $391 for FY 2026-27, including all plumbing fixtures, toilets, disposals, rainwater drains, water piping, treatment or softening equipment, gas piping and outlets, re-pipes, tankless water heaters and grey water systems. Storage-Type Water Heater: $85 in all three fiscal years. Sewer Lateral Replacement: $264, $277 and $282. Private Sewage Disposal Systems, each septic: $1,450 time-and-materials deposit. Stand Alone plumbing permit for individual appliances: $178, $188 and $192. From the OC Development Services Fee Schedule 2024-2027, fees effective July 21, 2024. See the official fee schedule for current amounts.
- Where do you apply for a plumbing permit in Orange County?
- You can apply through the Orange County permit portal or contact the OC Public Works, OC Development Services (Building & Safety) directly. The links are listed on this page.
- Can a homeowner pull a plumbing permit themselves in Orange County?
- Under California law (Business & Professions Code 7044(a)-(b); Business & Professions Code 7031.5): California exempts an owner-builder from contractor licensing when the owner personally performs the work, or uses only wage employees, on their own property and does not intend the improvements for sale. A homeowner may also directly hire licensed trade contractors for up to four single-family residences a year, or improve their own principal residence without a general contractor's license, as long as they have actually lived there for the 12 months before the work is finished. Selling a self-built structure within one year of completion creates a rebuttable presumption that it was built for sale, which defeats the exemption, and selling five or more structures within a year makes that presumption conclusive. Separately, every city or county that requires a building permit must also require the applicant to file a signed statement giving their contractor license number or the basis of their claimed exemption; a false or missing statement carries a $500 civil penalty. Confirm how Orange County applies this before you apply.
From the Library
What else needs a permit in Orange County
Every other permit type we have verified for this jurisdiction, with the rule that applies here.
| Project | Permit needed? | Threshold | Typical fee |
|---|---|---|---|
| Deck Permit | Permit required | Not specified | Decks are priced under the patio line items in the OC Development Services Fee Schedule... |
| Electrical Permit | Permit required | Not specified | Electrical Permit Application Flat Fee, 1 to 75 fixtures: $340 for FY 2024-25, $356 for... |
| Fence Permit | It depends | Fences and freestanding walls over six feet in height require a building permit; fences not over six feet are exempt unless a permit was required as a condition of project approval | Fences (over 6'): valuation-based, per the OC Development Services Fee Schedule... |
| HVAC Permit | Permit required | Not specified | Mechanical Permit Application Flat Fee: $400 for FY 2024-25, $420 for FY 2025-26, $429... |
| Patio Permit | Permit required | Not specified | Patio, Standard: Covers, Decks, Balconies, Enclosures: $768 for FY 2024-25, $803 for FY... |
| Pool Permit | Permit required | Not specified | Pool/Spa - New: valuation-based. |
| Roof Replacement Permit | Permit required | Not specified | Reroof: $342 for FY 2024-25, $362 for FY 2025-26, $370 for FY 2026-27. |
| Shed Permit | It depends | One-story detached accessory buildings used as tool and storage sheds, play houses and similar uses are exempt from a building permit only when the floor area does not exceed 120 square feet and the structure sits at least 3 feet from the property line and 6 feet from other buildings on the same property | The OC Development Services Fee Schedule 2024-2027 (effective July 21, 2024) publishes... |
| Solar Permit | Permit required | Not specified | Solar Permits, Roof-Mounted (includes County Standard Plan): $428 for FY 2024-25, $448... |
Plumbing Permit in other California localities
Everything above, sourced
Code references
National and state model-code sections the general guidance on this page is drawn from. They are not Orange County documents; the office above sets the local rules.
Verified by a person against the sources above on , not confirmed with OC Public Works, OC Development Services (Building & Safety). Rules change; confirm before you build. How we verify.
Last checked: Report an error on this page
Compare Plumbing Permit requirements across California localities