San Diego

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Plumbing Permit

This permit is required for the alteration, addition or replacement of a plumbing system or portion of a plumbing system within or on any structure or premises and to comply with the minimum standards necessary to safeguard public health, safety, and welfare, unless  exempted in PDF icon San Diego Municipal Code §129.0403.

Municipal Code:

PDF icon Plumbing Permit Procedures

  1. PDF icon Who may prepare Plans, Reports, Calculations, etc?
    • Plumbing plans and calculations shall be stamped and signed in accordance with the California Business and Professions Code. The plumbing plans and calculations shall be signed by a licensed mechanical engineer. An architect or civil engineer can sign the Plumbing plans only if he or she has designed the project as the responsible designer of the plumbing system. A mechanical contractor can sign and stamp the plumbing plans and calculations and/or Title 24 energy compliance for the plumbing system only if he/she is responsible for both the design and installation of the system. PDF icon Project Submittal Requirements, Section 2: 7.1
    • PDF icon Plumbing Permit Expiration and Extension
  2. Additions and Modifications to the California Codes



A plumbing permit is not required for the following plumbing work however, exemption from the permit requirements of the Plumbing Regulations does not authorize any work to be done in any manner in violation of the provisions of the Plumbing Regulations or any other applicable local or state regulations. Learn more about PDF icon exemptions from a plumbing permit

  • Stopping of leaks in drains, soil, waste, or vent pipe; however, this exemption does not apply for the replacement of any drain pipe, soil, waste or vent pipe with new material in any part as part of the repair.
  • Clearing of stoppages, or the repair of leaks in soil, waste, or vent pipes, valves, fixtures, or replacement of exposed traps in existing plumbing systems serving lavatories, sinks, laundry trays or similar fixtures.
  • Replacement in kind of plumbing fixtures, unless the installation requires an alteration or replacement of drainage, waste, vent or water supply piping.

Submittal Requirements:

  1. Single Dwelling Unit/Duplex
    • Plumbing plans are not required for one- and two-family dwellings or townhouses, as defined in the California Residential Code, and their accessory structures.
    • When plumbing fixtures are present, show all existing, proposed and relocated plumbing fixtures.  Plumbing equipment location, size, make and model of proposed water heater must be shown.  PDF icon Project Submittal Requirements, Section 2A: 5.1.5 – 5.1.6
    • Energy calculations are required for all new buildings and additions to building except accessory structures or non-habitable areas. PDF icon Project Submittal Requirements, Section 2A: 9.0
  2. All Other Buildings and Structures, PDF icon Construction Permits – Structures, Section 2: 7.0
    • Plumbing plans and calculations are required for all buildings and structures other than one-and two-family dwellings except when the installation qualifies for a no-plan permit (Simple Permit).
  3. Temporary Plumbing/Gas Permits.
    • See San Diego Municipal Code Section PDF icon 129.0402 and/or Section PDF icon 129.0403 for all information regarding temporary Plumbing/Gas Permits.

Fee Schedule:


Publications and Resources: