The plumbing is the part of a bathroom renovation you will never see again, and the part that decides whether the finished room works. Here is what to expect on the plumbing side, and how to keep it from becoming the expensive part.
Do You Need A Permit?
Replacing fixtures in the same place is usually maintenance. Moving a toilet, adding a shower, relocating a vanity or changing drain and vent piping needs a plumbing permit in Langley, Surrey, Abbotsford and most Lower Mainland municipalities. Rough-in is inspected before walls close, then a final once fixtures are in. Skipping it shows up at resale or on an insurance claim, when it is far more expensive to deal with.
What Drives The Cost
- Moving fixtures. Keeping the toilet, tub and vanity where they are is the single biggest saving. Moving a toilet means new drain and vent work, often in the floor.
- Pipe you find behind the wall. Poly-B, galvanized steel or cast iron drains usually get replaced while the wall is open, because you will not get a cheaper chance.
- The shower. A custom tiled shower needs a properly sloped base, a waterproofed pan and a valve set to the exact finished-wall depth. Prefab units are quicker and cheaper.
- Wall-hung and floating fixtures. They need carriers and blocking installed before drywall.
- Access. Concrete slab floors and second-storey bathrooms cost more to work in than a basement with an open ceiling.
The Order That Saves Money
- Choose fixtures before rough-in, so drains and supplies land where the actual vanity and tub go.
- Demolition and inspection of what is there.
- Rough-in: drains, vents, supplies, valve bodies, blocking. Permit inspection.
- Walls, tile and finishes.
- Fixture installation and final inspection.
The most common expensive mistake is a vanity or tub chosen after the walls are closed, with connections that do not match what is behind them.
Things Worth Adding While The Wall Is Open
- Shut-off valves at every fixture
- Blocking for future grab bars
- A pressure-balanced or thermostatic shower valve
- An access panel behind the tub valve
- Replacing any old supply or drain pipe in the same wall
Related: mechanical renovations · bathroom rough-in milestones · a Langley bathtub replacement
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- 7 Signs You Need a Plumber in Langley BC
- Poly-B Pipe Replacement Cost in BC — What Langley Homeowners Need to Know
