How do I convert a tub-shower combo to a standalone walk-in shower in a Vancouver home?

Converting a tub-shower combo to a standalone walk-in shower is one of the most popular bathroom renovations in Metro Vancouver, and the process involves demolition, plumbing modifications, waterproofing, and finishing — typically taking 5 to 10 working days and costing $5,000 to $15,000 depending on finish level and complexity. This is not a DIY project; it requires a licensed plumber and an experienced tile installer at minimum.

The process follows a specific sequence that experienced contractors know well. Getting the order right is critical — skipping steps or doing them out of sequence leads to costly rework.

Demolition and Assessment

The first step is removing the existing tub, surrounding tile or surround panels, and any damaged drywall or substrate. This is the stage where you discover what is behind the walls — and in older Vancouver homes (pre-1975), you may find galvanized steel supply lines that should be replaced with copper or PEX, cast iron drain piping that may need updating, or even asbestos in old floor tiles or pipe insulation. Homes built before 1990 should have suspect materials tested for asbestos before demolition begins — professional asbestos testing costs $200–$400 and is a wise precaution. Demolition for a standard tub-shower conversion runs $500–$1,500 including haul-away of the old tub and debris.

Plumbing Modifications

The bathtub drain sits in a different location than a shower drain, and the drain configuration is different. A bathtub uses a 1.5-inch drain with an overflow; a shower requires a 2-inch drain positioned for proper floor slope. A licensed plumber will relocate the drain, adjust the trap, and verify the vent connections meet BC Plumbing Code requirements. If you are moving from a tub faucet to a shower valve mounted higher on the wall, the supply line rough-in also needs modification. Plumbing work for a tub-to-shower conversion typically costs $800–$2,500 and requires a plumbing permit from your municipality. The City of Vancouver plumbing permit runs approximately $150–$300.

Substrate and Waterproofing

Once plumbing is roughed in and inspected, cement backer board (Durock or HardieBacker) is installed on all shower walls — never standard drywall or greenboard. The shower floor receives either a preformed acrylic or solid-surface shower base ($300–$800 for the base, $1,500–$3,500 installed) or a custom-tiled shower pan with a mortar bed, pre-slope, waterproof liner, and final mud bed ($2,000–$5,000 installed). A custom tile pan gives you more design flexibility and allows for a curbless or low-curb entry.

Waterproofing is the most critical step in the entire project. A continuous waterproof membrane — Schluter Kerdi sheet membrane ($4–$8 per square foot installed) or liquid-applied membrane like RedGard ($2–$5 per square foot installed) — must cover every square inch of the shower walls and floor, with all seams, corners, and penetrations (valve, shower head, niche) sealed with membrane tape or additional liquid membrane. In Vancouver's humid climate, where outdoor humidity averages 75–85%, any gap in the waterproofing will lead to moisture infiltration and mould growth behind the tile. This is the single most important investment in the entire conversion.

Tile, Fixtures, and Finishing

With waterproofing complete and verified, tile installation begins — floor first (small mosaic for slope conformity), then walls. A glass shower enclosure or door is measured and ordered after tile is complete (frameless glass takes 2–3 weeks for fabrication). The shower valve trim, shower head, and accessories (niche shelves, grab bars) are installed last. Total tile and finishing for a standard tub-to-shower conversion runs $3,000–$8,000 depending on tile selection and glass enclosure type.

For Vancouver condos, add strata approval (obtain before any work begins), contractor insurance documentation ($2 million minimum liability is standard), restricted work hours (typically 8:30 AM–4:30 PM weekdays), and materials handling logistics for upper-floor units. Strata requirements typically add 10–20% to the project cost.