Do I need a plumbing permit in Calgary if I'm retiling a shower and replacing the drain at the same time?

Yes, you will need a plumbing permit from the City of Calgary if you're replacing the shower drain as part of your retiling project. Any work that involves relocating, replacing, or modifying plumbing fixtures and drainage connections requires a permit and inspection by a Safety Codes Officer.

What Triggers the Permit Requirement

Replacing a shower drain involves disconnecting and reconnecting the drain assembly to the waste line beneath the shower pan. This is considered plumbing work under the Alberta Safety Codes Act, even if it's part of a larger tile renovation. The drain replacement must be performed by a licensed plumber who will pull the permit and arrange for the required inspection. Simply retiling over an existing drain without modification does not require a permit — but the moment you disconnect that drain assembly, you've crossed into permitted work territory.

The Process in Calgary

Your licensed plumber will apply for the plumbing permit through the City of Calgary's online portal or in person at the Municipal Building. The permit fee is typically $85-$150 depending on the scope of work. Once the drain replacement is complete but before the new tile work covers the area, a Safety Codes Officer will inspect the installation to ensure it meets the Alberta Building Code requirements for proper slope, waterproofing integration, and secure connections. Only after the inspection passes can your tile installer proceed with waterproofing membrane and tile installation over the new drain.

Coordinating Trades and Timing

This creates a specific sequence for your shower retile project. First, the licensed plumber removes the old tile around the drain area, replaces the drain assembly, and calls for inspection. After the inspection passes, your tile installer can begin the waterproofing membrane installation (Schluter Kerdi, RedGard, or Laticrete Hydro Ban) that integrates with the new drain assembly, followed by tile installation. Attempting to coordinate this work without proper permits puts you at risk of having to tear out completed tile work if the City discovers unpermitted plumbing modifications during a later inspection or sale.

Calgary's Chinook climate makes proper drain installation even more critical — the extreme temperature swings cause substrate movement that can stress improperly installed drain connections. A professional plumber familiar with Calgary conditions will ensure the drain assembly has proper flexibility to handle seasonal movement without compromising the waterproof seal.

Cost Considerations

Budget an additional $400-$800 for the licensed plumber's work and permit fees on top of your tile installation costs. While this adds to the project expense, proper permitting protects you from liability issues and ensures the work meets code requirements. Unpermitted plumbing work can create problems during home sales and may void insurance coverage if water damage occurs from faulty installation.

Need help finding both a licensed plumber and tile installer for your shower project? Calgary Tiling can match you with local professionals through the Calgary Construction Network who understand the permit coordination process.