Start with the layout
The toilet is the hardest fixture to move because it needs a 3 inch drain and a vent within a limited distance. Vanities and showers are more flexible. Keeping the toilet roughly where it is saves cost; moving it across the room may mean opening the floor and ceiling below.
Decisions to make early
- Shower or tub. Trading the tub for a walk-in stall is a frequent request, though the drain may need to be enlarged and moved.
- Curbless shower. Requires the floor to be recessed or the drain set lower, often involving the joists.
- Shower valve. Pressure-balancing valves are standard; thermostatic valves allow separate temperature and volume control.
- Body sprays or rain heads. Need adequate supply size and possibly a larger valve.
- Freestanding tub. Calls for a drain in the floor under it and a filler standing up from the floor.
- Wall-hung toilet. Needs an in-wall carrier and thicker wall.
Waterproofing
Showers need a continuous waterproofing system tied into the drain. Talk to your tiler about which system they use so the plumber installs a matching drain.
Budgeting
Hidden problems are common once walls are open: corroded pipe, poor past work, damaged subfloor. Set aside a contingency.
Permits
Many bathroom renovations in Whitby need a plumbing permit, especially if fixtures are added or moved. Read plumbing permits before you start.
See also bathroom renovation plumbing and shower valve replacement.