Plumbing Permit Requirements

Home Owner Rule

A home owner does not need to obtain a plumbing permit for the interior of their home provided he/she is doing the plumbing installation themselves and the residence is for the owner's personal use and not built on speculation of resale or intended as a rental property.  If the home owner wishes to have the work inspected by the Building Division, then a plumbing permit must be obtained to cover the cost for inspections.  See State of Montana Building Codes Bureau

Required Plumbing Permits

A permit is required for any installation, removal, alteration, or repair of plumbing, water and sewer service lines, gas lines, and drainage systems or parts thereof.

Plumbing permits need to be obtained by a State of Montana licensed Plumber. Exception see Home Owner Rule.

Work Exempt from Permit

  • The stopping of leaks in drains, water, soil, waste or vent pipe, provided, however, that if any concealed trap, drain pipe, water, soil, waste or vent pipe becomes defective and it becomes necessary to remove and replace the same with new material, such work shall be considered as new work and a permit shall be obtained and inspection made as provided in this code.
  • The clearing of stoppages or the repairing of leaks in pipes, valves or fixtures and the removal and reinstallation of water closets, provided such repairs do not involve or require the replacement or rearrangement of valves, pipes or fixtures.