Plumbing Permit in San Diego County, California
Permit required
Yes, a permit is required
Before installing, altering, repairing, removing, converting or replacing plumbing or gas piping in unincorporated San Diego County, including a homeowner-installed water heater replacement
Issued byPlanning & Development Services (PDS), Building Services Division
By Mario Bailey, verified against official sources
Quick answer
San Diego County requires a permit to erect, install, enlarge, alter, repair, remove, convert or replace any plumbing or gas system. The exemptions are narrow and turn on who does the work. Replacing a water heater is exempt only when there is no change to the unit type or servicing utilities and a California licensed plumbing contractor performs it, which means a homeowner doing the same swap needs a permit. Replacing a toilet, bidet, showerhead or faucet is exempt only when done by the building owner or a licensed plumbing contractor, limited to the service side of the fixture's shut-off valve, with no work inside a floor, ceiling or wall cavity and no fixture connected to a gas line or electrical service. Stopping a leak is exempt, but if a concealed trap, drain, water, soil, waste or vent pipe has to be removed and replaced, the county treats that as new work requiring a permit and inspection. This applies to unincorporated San Diego County; the 18 incorporated cities, including San Diego, Chula Vista, Oceanside and Escondido, run their own building departments.
Typical threshold: Plumbing and gas work needs a permit; the notable exemption is a replacement water heater with no change to the unit type or servicing utilities when installed by a California licensed plumbing contractor.
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When a permit is usually needed
Before installing, altering, repairing, removing, converting or replacing plumbing or gas piping in unincorporated San Diego County, including a homeowner-installed water heater replacement
What a plumbing permit costs in San Diego County
How San Diego 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 | ...permit scope, 'Plumbing Permit 17% of Building Permit Fees, $140.00... |
| Contra Costa County | Permit required | Land Development Fee Schedule S-002 E.6, "Plumbing Permit (Other) $75.00... |
| Fresno County | Permit required | ...2026-27: Alteration, repair or addition of a drain or waste line $80.47... |
| Los Angeles | Permit required | ...per fixture per LADBS Fee Sch.5 (7/2017), for example a toilet at $23 and... |
| Los Angeles County | Permit required | ...the Los Angeles Code, Ord. No. 2013-0050), effective July 1, 2026: $41.35... |
| Orange County | Permit required | Plumbing Permit Application Flat Fee: $363 for FY 2024-25, $383 for FY... |
| San Diego Countythis page | Permit required | ...07/10/2026, FY 25/26) line item "Plumbing Only": Permit Fee $392.00, no... |
How to apply in San Diego County
In San Diego 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:
- For San Diego County, 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).
- For San Diego County, 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. Planning & Development Services (PDS), Building Services Division sets the exact checklist for San Diego County.
Where to apply in San Diego County:
Planning & Development Services (PDS), Building Services Division
- 5510 Overland Ave., Suite 110, San Diego, CA 92123
- Phone: 858-565-5920
- Email: pdsbuildingpermitcounter@sdcounty.ca.gov
Plumbing Permit in San Diego County compared with nearby California localities
| Locality | Permit needed? | Threshold | What each California schedule says | Verified |
|---|---|---|---|---|
| San Diego County | Permit required | Plumbing and gas work needs a permit; the notable exemption is a replacement water heater with no change to the unit type or servicing utilities when installed by a California licensed plumbing contractor. | ...613 (effective 07/10/2026, FY 25/26) line item "Plumbing Only": Permit Fee $392.00... | |
| Alameda County | Permit required | Any size | ...of a building permit scope, 'Plumbing Permit 17% of Building Permit Fees, $140.00... | |
| Contra Costa County | Permit required | Any size | Land Development Fee Schedule S-002 E.6, "Plumbing Permit (Other) $75.00 minimum."... | |
| Fresno County | Permit required | Any size | ...Fees, FY 2026-27: Alteration, repair or addition of a drain or waste line $80.47... | |
| Los Angeles | Permit required | Any size | Itemized per fixture per LADBS Fee Sch.5 (7/2017), for example a toilet at $23 and a... |
Inspections and closing out your permit
In San Diego County, 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.
- In San Diego County: 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).
- In San Diego County: 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).
- In San Diego County: 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).
- In San Diego County: 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).
- In San Diego County: 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).
- In San Diego County: 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).
- In San Diego County: 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 San Diego County permit portal or by phone at 858-565-5920.
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 San Diego County
- Confirm the requirement. Yes, a permit is required. Typical threshold: Plumbing and gas work needs a permit; the notable exemption is a replacement water heater with no change to the unit type or servicing utilities when installed by a California licensed plumbing contractor. Usually needed: Before installing, altering, repairing, removing, converting or replacing plumbing or gas piping in unincorporated San Diego County, including a homeowner-installed water heater replacement.
- Budget the fee. PDS 613 (effective 07/10/2026, FY 25/26) line item "Plumbing Only": Permit Fee $392.00, no plan review fee. "Electrical and Plumbing" or "Plumbing and Mechanical" is $498.00, and "Electrical, Plumbing and Mechanical" is $734.00. Official fee schedule.
- Apply. In San Diego 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. Start at the San Diego County permit portal.
- Keep the office details handy. Planning & Development Services (PDS), Building Services Division. Phone: 858-565-5920. Address: 5510 Overland Ave., Suite 110, San Diego, CA 92123.
- Plan for inspections. In San Diego County, 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 San Diego County?
- San Diego County requires a permit to erect, install, enlarge, alter, repair, remove, convert or replace any plumbing or gas system. The exemptions are narrow and turn on who does the work. Replacing a water heater is exempt only when there is no change to the unit type or servicing utilities and a California licensed plumbing contractor performs it, which means a homeowner doing the same swap needs a permit. Replacing a toilet, bidet, showerhead or faucet is exempt only when done by the building owner or a licensed plumbing contractor, limited to the service side of the fixture's shut-off valve, with no work inside a floor, ceiling or wall cavity and no fixture connected to a gas line or electrical service. Stopping a leak is exempt, but if a concealed trap, drain, water, soil, waste or vent pipe has to be removed and replaced, the county treats that as new work requiring a permit and inspection. This applies to unincorporated San Diego County; the 18 incorporated cities, including San Diego, Chula Vista, Oceanside and Escondido, run their own building departments. Always confirm with the Planning & Development Services (PDS), Building Services Division before starting.
- How much does a plumbing permit cost in San Diego County?
- PDS 613 (effective 07/10/2026, FY 25/26) line item "Plumbing Only": Permit Fee $392.00, no plan review fee. "Electrical and Plumbing" or "Plumbing and Mechanical" is $498.00, and "Electrical, Plumbing and Mechanical" is $734.00. See the official fee schedule for current amounts.
- Where do you apply for a plumbing permit in San Diego County?
- You can apply through the San Diego County permit portal or contact the Planning & Development Services (PDS), Building Services Division directly. The links are listed on this page.
- Can a homeowner pull a plumbing permit themselves in San Diego County?
- Under California law (Business & Professions Code 7044(a)-(b); Business & Professions Code 7031.5): California exempts an owner from contractor licensing under section 7044 when they personally perform all the work on their own property, or any work they do not perform themselves is done by their own employees paid only wages, and none of the improvements are intended or offered for sale. It also exempts an owner who directly contracts with licensed contractors for each trade, as long as no more than four of the single-family residential structures involved are intended or offered for sale in a calendar year; this route does not apply if the owner instead contracts with a general contractor for the construction. A homeowner may also improve their own principal residence without a license, as long as the work is done before any sale, they have actually resided there for the 12 months before completion, and they have not used this exemption on more than two structures more than once in any three-year period. 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 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 civil penalty of up to $500. Confirm how San Diego County applies this before you apply.
From the Library
What else needs a permit in San Diego 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 | It depends | A deck needs a building permit when it is more than 30 inches above adjacent grade, or sits over a basement or story below, or forms part of an accessible route. | ...from the Schedule of Building Permit Fees Based on Valuation, which is $374.00 for... |
| Electrical Permit | Permit required | Electrical work needs a permit; exemptions are limited to minor repairs, low-voltage signal wiring not over 25 volts between conductors, and connecting a portable appliance to an existing permanently installed receptacle. | ...(effective 07/10/2026, FY 25/26) line item "Electrical Only": Permit Fee $392.00... |
| Fence Permit | It depends | Fences and freestanding masonry walls over 6 feet in height need a building permit; open fences up to 8 feet are also exempt if the uppermost two feet is only barbed or razor wire on angled supports. | ...fence, re-roof, stairs, radio tower, antenna, etc." at a Plan Review Fee of $405.00... |
| HVAC Permit | Permit required | Mechanical work needs a permit; the county exempts only minor service work such as replacing a faulty control, valve, drier or filter, or repairing equipment without removing it from its installed position. | ...(effective 07/10/2026, FY 25/26) line item "Mechanical Only": Permit Fee $392.00... |
| Patio Permit | It depends | Patio covers and carports accessory to an individual dwelling unit need a building permit once projected roof area exceeds 300 square feet. | ...fence, re-roof, stairs, radio tower, antenna, etc." at a Plan Review Fee of $405.00... |
| Pool Permit | It depends | The only exempt pool is a prefabricated pool accessory to a one- or two-family dwelling that is less than 18 inches deep, holds no more than 5,000 gallons, and sits entirely above ground; everything else needs a permit. | ...07/10/2026, FY 25/26) line item "Swimming Pool/ Spa": Plan Review Fee $266.00 plus... |
| Roof Replacement Permit | Permit required | Any size | ...fence, re-roof, stairs, radio tower, antenna, etc." at a Plan Review Fee of $405.00... |
| Shed Permit | It depends | One-story detached non-habitable accessory structures such as tool or storage sheds need a building permit once floor area exceeds 120 square feet. | ...or Recreational Room Simple Enough for OTC review" at a Plan Review Fee of $578.00... |
| Solar Permit | Permit required | Any size | The county's Getting Started with Solar Photovoltaic page states that "Currently, the... |
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 San Diego County documents; the office above sets the local rules.
How this plumbing permit page for San Diego County was verified. 2 official sources: sandiegocounty.gov, sandiegocounty.gov; fee schedule: official document. Last checked by Mario Bailey, not confirmed with Planning & Development Services (PDS), Building Services Division. Rules change; confirm before you build. How we verify.
Last checked: Report an error on this page
Compare Plumbing Permit requirements across California localities