Plumbing permits in BC sit in a frustrating grey zone for most homeowners. Big projects clearly need them. Small fixes clearly don't. But there's a substantial middle ground where the answer depends on the municipality, the type of work, and whether you're hiring a licensed plumber or doing it yourself. Doing work that needed a permit without one creates real problems — failed inspections at resale, insurance issues if there's a future failure, and the occasional stop-work order from a passing inspector. Here's the practical guide for the Lower Mainland.
The general rule, then the exceptions
Almost every Lower Mainland municipality follows the same general rule: any plumbing work that alters the system (changes pipe routing, adds or relocates fixtures, modifies the water supply or drainage system, or touches gas) requires a plumbing permit. Repairs that simply replace a failed component in its original location and configuration usually don't.
Work that DEFINITELY requires a permit
- Sewer line replacement or repair (any portion of the underground line from the foundation to the property line)
- Water service line replacement (from the city meter to the house)
- Adding a new bathroom or laundry — anywhere there's a new drain connection
- Relocating a fixture (moving a toilet, sink, tub to a new location)
- Tankless water heater installation when replacing a tank, OR when relocating a water heater to a new spot
- Any gas work whatsoever — connecting an appliance, running a new line, capping a line — gas work in BC must be done by a BC-certified gas fitter and requires a permit
- Backflow preventer installation
- Connecting a new outbuilding or addition to the existing plumbing system
- Any work that crosses the property line (sewer connection to city main, water service to city main)
Work that USUALLY doesn't need a permit
- Replacing a toilet in its existing location with a similar-sized toilet (the wax ring, flange, and supply line are component replacements, not system alterations)
- Replacing a faucet, valve, or supply line under a sink
- Replacing a garbage disposal
- Replacing a water heater 'like for like' (same fuel type, same location, same approximate capacity) — this varies slightly by municipality; Surrey and Burnaby require no permit, Vancouver's bylaws can be tighter on tankless conversions
- Replacing a P-trap or section of drain pipe
- Replacing an outdoor hose bib in the same location
- Clearing a clogged drain (cabling or hydro-jetting an existing line, not modifying it)
The grey zone — varies by municipality
- Adding a single new hose bib on an exterior wall — some cities require a permit, others don't
- Installing a water softener that requires a drain connection to existing plumbing
- Replacing a water heater with a different fuel type (e.g. electric to gas) — usually requires both plumbing and gas permits
- Replacing a kitchen sink with one that requires moving the drain location by more than a few inches
- Re-routing supply lines during a kitchen renovation
When in doubt, ask. Calling the city plumbing inspector and describing what you want to do takes 5 minutes and gets you a definitive answer. Or hire a licensed plumber who will know — and will pull the permit on your behalf if needed.
Who can pull a permit
Two paths in BC:
Licensed plumbing contractor
Any BC-licensed plumber can pull a plumbing permit and is responsible for the work meeting code. The inspection process is straightforward because the plumber knows what inspectors look for. This is the default for any non-trivial work — we pull the permit, do the work, coordinate the inspection, and hand you the signed-off paperwork.
Owner-permit (homeowner pulls their own)
Most BC municipalities allow a homeowner to pull a permit to do their own plumbing work on their own home, IF they actually live there (not for rental properties, not for properties they're flipping). The homeowner-permit path has some real catches:
- You're personally on the hook for the work meeting code
- Failed inspection = you fix it, possibly twice
- Insurance complications — many home insurance policies have exclusions for owner-done plumbing failures
- Resale liability — work disclosed as owner-done may affect the sale or trigger a buyer's inspection contingency
Owner-permit makes sense for very specific situations (you're a retired tradesperson, you're truly doing minor work, you have time to navigate the inspection process). For most homeowners, hiring it out is faster and less stressful.
The permit process — what to expect
- Application — typically online through the municipality's e-permitting portal, with a sketch or description of the work, the licensed plumber's info (if applicable), and a fee
- Plan review — for major work (additions, sewer line replacements), a city plumbing inspector reviews the proposal
- Permit issued — typically within 1–10 business days depending on complexity and municipality
- Work performed — to BC plumbing code requirements
- Rough-in inspection — for work that will be covered by walls/floors, an inspector visits before closure to verify pipes, joints, and connections
- Final inspection — full system pressure-tested, fixtures connected, work signed off
- Permit closed — final paperwork; this is the document you keep for resale records
For minor work (replacing a water heater, single-fixture replacement that needs a permit), inspection may just be a final visit — no rough-in needed.
Common gotchas we see
Tankless water heater conversion done without a permit
A tank-to-tankless conversion almost always requires both plumbing and gas permits. We see homeowners (or unlicensed installers) skip the permit, then have problems years later when selling — buyer's inspector flags the un-permitted gas work, the sale stalls until it's remediated. Get the permit at install time. Adds days, not weeks. Worth it.
Sewer line repair claimed as 'cleaning' to avoid a permit
Some homeowners get talked into a 'sewer line cleaning' by an unscrupulous operator when what's actually happening is a partial repair or cut-and-replace. If a piece of pipe is being installed, that's a repair and it needs a permit. We won't do unpermitted sewer line work — full stop.
Adding a basement bathroom without telling the city
Hugely common, hugely problematic on resale. The unpermitted bathroom may not show up in the property's plumbing records, but the new drain connections and supply lines are visible in any inspection. Buyers ask for permits; if there aren't any, the sale gets complicated. Permits cost a fraction of the resale headache.
Hot water on hot water cross-connection
Replacing a recirculating pump or making changes to a hot-water recirculation loop can inadvertently create a code violation if cold-water inlet routing is wrong. We see this on DIY tankless installs occasionally. Triple-check or hire it out.
If you've already done work without a permit
Two options:
Retro-permit
Most BC municipalities allow a 'work-without-permit' or retroactive permit application. You submit it, the city inspector evaluates the existing work, and if it meets code, the permit is issued (with a financial penalty, typically 2x the normal permit fee). If the work doesn't meet code, you have to bring it up to code first. It's not pleasant but it's recoverable.
Hire a licensed plumber to assess and retro-permit
We routinely help homeowners through this. We assess the existing work, identify any code issues, do the corrective work, then walk the city inspector through the retroactive sign-off. The total cost is usually less than redoing the work from scratch, and once the permit is closed your property records are clean.
Frequently asked
Does the permit appear on my property records?
Yes — closed plumbing permits become part of the property's plumbing history at the municipality. Buyers and their inspectors can request these records, which is exactly what makes permits valuable at resale (they show the work was done to code by qualified people).
How much does a permit cost?
Permit fees vary by municipality and project type. Most Lower Mainland residential plumbing permits run $100–500 for typical work, more for major projects like full sewer replacements. We bundle permit costs into our written estimates so they're never a surprise.
Can I get in trouble for old un-permitted work?
The city doesn't typically go looking for old un-permitted work, but it can become an issue at resale (buyer's inspector flags it), during an insurance claim (insurer asks for permit records), or when applying for a related permit (city inspector notices the previous un-permitted work and asks about it). Retro-permitting before any of these triggers is the cleanest path.
Got the problem we just described? We answer 24/7 across Surrey, Langley, Vancouver, Burnaby, Coquitlam, Delta, White Rock, and Richmond. Call Mr. Plunger Plumbing & Drainage at (604) 870-1442 — real plumber on the line, exact ETA before dispatch, up-front quote before any work starts.