Renovating a Bathroom or Kitchen in Metro Vancouver? Sort the Plumbing Out First

The most expensive plumbing mistakes we see in Metro Vancouver renovations are not leaks — they are decisions made in the wrong order. A homeowner closes up a wall, then realizes the shower valve is in the wrong spot, or that the sixty-year-old galvanized pipe feeding the new $4,000 vanity is the reason the water still runs rusty. Getting the plumbing sorted before the reno starts is the difference between a clean project and a demo-it-twice one.

Here is what to settle first, and why the sequence matters.

1. Figure out if your reno needs a plumbing permit

In British Columbia — and specifically in the City of Vancouver and the surrounding municipalities — the rule of thumb is simple: if you move or add a fixture, you need a plumbing permit. That means relocating a sink or toilet, adding a shower, running a new dishwasher or fridge line, or changing the drain and vent routing behind the wall. A straightforward like-for-like replacement in the same location — a new tub where the old tub sat, on the same drain — generally does not.

The nuance that catches people: even moving a fixture a short distance counts as new work, because it changes the drain, vent, and supply layout that the code governs. The permit is not red tape for its own sake — it triggers the inspection that confirms your drains slope correctly, your venting is right, and your supply lines are sized properly, all of which protect the home (and your insurance) long after the tile goes up.

One more thing worth knowing: the permit is normally pulled by the licensed plumbing contractor, not the homeowner or the general contractor. When a licensed plumber pulls it, they become professionally responsible for the work meeting the BC Plumbing Code and passing inspection. (For water heaters specifically, the rules are their own thing — we broke those down in do you need a permit to replace a water heater in BC.)

2. Treat open walls as a one-time opportunity

This is the single most valuable point in this article. A renovation tears open the exact walls and floors that a plumber would otherwise have to cut into — and pay to patch — during a standalone repair. That means the marginal cost of upgrading your pipes while you are already renovating is a fraction of what it costs later.

It matters most in Metro Vancouver's older housing stock. Homes built before the 1970s often still run original galvanized steel supply lines that corrode from the inside out — the cause of that rusty first-draw water, dropping pressure, and pinhole leaks. Many 1980s and 1990s homes have Poly-B (polybutylene), which insurers increasingly flag. If your walls are coming open anyway, that is the moment to replace those runs with PEX or copper — both accepted under the BC Plumbing Code — rather than tiling over a pipe that is on borrowed time.

We see it constantly: a beautiful new Burnaby bathroom fed by a 1958 galvanized line that should have been swapped while the studs were exposed. If you are unsure what you have, that assessment is exactly what our repiping & renovation team does before the drywall stage — not after.

3. Lock your fixtures and hot-water plan before the rough-in

Plumbing rough-in — the pipes inside the walls and floor — has to be placed for the specific fixtures you have chosen. A wall-mounted faucet, a freestanding tub filler, a second showerhead, a pot-filler over the range: each changes where the supply and drain need to land. Choosing fixtures after the rough-in is how you end up opening a wall twice.

So decide, before rough-in day:

• Every fixture and its location — sinks, toilet, tub, shower, and any new lines (dishwasher, fridge, pot-filler, bidet). Our faucets & fixtures page covers what to think through.
• Your hot-water capacity. Adding a second bathroom or a big soaker tub can outrun an older tank. A renovation is the natural moment to right-size — or to weigh a switch to tankless. We compared the two for BC homes in tankless vs. tank water heaters, and our hot water tank team can size it to the finished house, not the old one.
• Shut-offs and access. Ask for isolation valves on the new fixtures and a sensible access panel for the tub — small things that make the next twenty years easier.

4. Keep the trades in the right order

A renovation only flows if the trades go in sequence: demolition, then plumbing and electrical rough-in while the walls are open, inspection, insulation and drywall, then finishing — and the plumber comes back at the end to set the fixtures. Plumbing rough-in that happens after the drywall closes means cutting it open again.

This is where a good general contractor earns their keep: they hold that sequence, book the inspections at the right stage, and keep the plumber and the tile-setter from colliding. On renovation projects across Metro Vancouver we work alongside Naybur Contracting, a licensed local general contractor — the kind of build partner who keeps the rough-in, inspection, and finishing in the order that saves you from paying for the same wall twice. If you are managing the reno yourself, just hold the line on one rule: nothing closes up until the plumbing has been roughed in and inspected.

The short version

Sort the plumbing before the pretty stuff. Confirm whether you need a permit (moving a fixture almost always means yes), use the open walls to replace aging galvanized or Poly-B while it is cheap to reach, choose your fixtures and hot-water plan before the rough-in, and keep the trades in order. Do that and the renovation goes in once. Planning a bathroom, kitchen, or whole-home reno in Burnaby or Metro Vancouver? Talk to our renovation plumbing team before the walls close — that is when we save you the most.