What Are Garage Suite Plumbing Requirements in Calgary?
Plumbing Permit & Code Requirements
Garage suites in Calgary require a City of Calgary plumbing permit before any water or drainage work begins. The permit process typically takes 5–10 business days and costs $150–$300 depending on fixture count.
All plumbing must meet Alberta Building Code Section 9.2 and the current Calgary Plumbing Code. Work must be performed by a licensed Alberta plumber—DIY plumbing is not permitted.
Required Plumbing Fixtures & Specifications
- Separate water supply: Your suite needs its own dedicated water line with shut-off valve
- Bathroom requirements: If included, you need a toilet, sink, and shower/tub with proper venting
- Kitchen setup: Kitchenette sinks require grease trap installation and separate drainage
- Backflow prevention: All suites require approved backflow preventer devices on water supply
- Drain/waste/vent (DWV): All drains must slope properly (¼” per foot minimum) and connect to municipal sewer
- Ventilation: Plumbing vent stacks must extend above roof line with proper clearance
Inspection & Approval
The City of Calgary requires rough-in inspection before walls close and final inspection before occupancy. Your licensed plumber schedules these with the City.
Estimated Plumbing Costs
| Component | Cost Range |
|---|---|
| Bathroom rough-in (toilet, sink, shower) | $1,200–$1,800 |
| Kitchen sink & drainage | $600–$900 |
| Water supply & shut-off | $400–$600 |
| Backflow preventer | $250–$400 |
| Permit & inspections | $200–$400 |
| Total | $2,650–$4,100 |
OAF Construction coordinates all plumbing work with licensed contractors and manages City permits to ensure your Calgary garage suite meets code requirements.