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Chapter 1 — GENERAL CODE PROVISIONS

103.3 Applications and Permits.

California Mechanical Code (Title 24, Part 4) · 2025 edition · updated 2026-09-12 · California

Italicized text is a California amendment to the model code, as printed in the official publication.

The Authority Having Jurisdiction shall be permitted to require the submission of plans, specifications, drawings, and such other information in accordance with the Authority Having Jurisdiction, prior to the commencement of, and at a time during the progress of, work regulated by this code.

The issuance of a permit upon construction documents shall not prevent the Authority Having Jurisdiction from thereafter requiring the correction of errors in said construction documents or from preventing construction operations being carried on thereunder where in violation of this code or of other pertinent ordinance or from revoking a certificate of approval where issued in error.

103.3.1 Licensing. Provision for licensing shall be determined by the Authority Having Jurisdiction.

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▸Contents — California Mechanical Code (Title 24, Part 4)
California Mechanical Code (Title 24, Part 4)
  1. ▸Chapter 1 — GENERAL CODE PROVISIONS
    Overview
    1. 104.2 Items (1) through (5) of this code.
    2. 101.1 Title.
    3. 101.2 Scope.
    4. 101.3 Purpose.
    5. 101.4 Unconstitutional.
    6. 101.5 Validity.
    7. 102.1 Conflicts Between Codes.
    8. 102.2 Existing Installations.
    9. 102.3 Maintenance.
    10. 102.4 Additions, Alterations, Renovations, or Repairs.
    11. 102.5 Health and Safety.
    12. 102.6 Changes in Building Occupancy.
    13. 102.7 Moved Structures.
    14. 102.8 Appendices.
    15. 103.1 General.
    16. 103.2 Liability.
    17. 103.3 Applications and Permits.
    18. 103.4 Right of Entry.
    19. 104.1 Permits Required.
    20. 104.2 Exempt Work.
    21. 104.3 Application for Permit.
    22. 104.4 Permit Issuance.
    23. 104.5 Fees.
    24. 105.1 General.
    25. 105.2 Required Inspections.
    26. 105.3 Testing of Systems.
    27. 105.4 Connection to Service Utilities.
    28. 106.1 General.
    29. 106.2 Notices of Correction or Violation.
    30. 106.3 Penalties.
    31. 106.4 Stop Orders.
    32. 106.5 Authority to Disconnect Utilities in Emergen-cies.
    33. 106.6 Authority to Condemn.
    34. 107.1 General.
    35. 107.2 Limitations of Authority.
  2. Chapter 2 — DEFINITIONS
  3. Chapter 3 — GENERAL REGULATIONS
  4. Chapter 4 — VENTILATION AIR
  5. Chapter 5 — EXHAUST SYSTEMS
  6. Chapter 6 — DUCT SYSTEMS
  7. Chapter 7 — COMBUSTION AIR
  8. Chapter 8 — CHIMNEYS AND VENTS
  9. Chapter 9 — INSTALLATION OF SPECIFIC APPLIANCES
  10. Chapter 10 — BOILERS AND PRESSURE VESSELS
  11. Chapter 11 — REFRIGERATION
  12. Chapter 12 — HYDRONICS
  13. Chapter 13 — FUEL GAS PIPING
  14. Chapter 14 — PROCESS PIPING
  15. Chapter 15 — SOLAR ENERGY SYSTEMS
  16. Chapter 16 — STATIONARY POWER PLANTS
  17. Chapter 17 — GEOTHERMAL ENERGY SYSTEMS AND AMBIENT TEMPERATURE…
  18. Chapter 18 — REFERENCED STANDARDS
  19. Appendix A — RESIDENTIAL PLAN EXAMINER REVIEW FORM FOR HVAC SY…
  20. Appendix B — PROCEDURES TO BE FOLLOWED TO PLACE GAS EQUIPMENT …
  21. Appendix C — INSTALLATION AND TESTING OF OIL (LIQUID) FUEL-FIR…
  22. Appendix D — FUEL SUPPLY: MANUFACTURED/MOBILE HOME PARKS AND R…
  23. Appendix E — SUSTAINABLE PRACTICES
  24. Appendix F — SIZING OF VENTING SYSTEMS AND OUTDOOR COMBUSTION …
  25. Appendix G — EXAMPLE CALCULATION OF OUTDOOR AIR RATE
  26. Appendix H — PROFESSIONAL QUALIFICATIONS
  27. Appendix I — INDOOR HORTICULTURAL FACILITIES
  28. Appendix J — CLEAN AIR DELIVERY

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