Garage Conversion Costs: With Bathroom vs Dry Space in Vancouver

Adding a full bathroom to a garage conversion in Metro Vancouver typically adds $15,000 to $30,000 on top of a dry conversion, pushing the total from roughly $40,000–$65,000 for a basic dry living space to $60,000–$95,000 for a conversion with a complete three-piece bathroom. The plumbing component is the single largest cost differentiator between the two project types, and understanding exactly where that money goes helps you decide whether the investment makes sense for your situation.

A dry garage conversion — one with no plumbing whatsoever — covers the essential work of transforming an uninsulated vehicle storage space into a comfortable, code-compliant habitable room. In Metro Vancouver, this scope typically includes removing the garage door and framing an insulated wall with windows ($4,000 to $8,000), insulating walls to R-22 and ceiling to R-40 ($5,000 to $10,000), building up the floor with insulation, vapour barrier, and subfloor ($5,000 to $12,000), electrical work including new circuits, outlets, lighting, and potentially a panel upgrade ($4,000 to $8,000), installing a ductless mini-split heat pump ($4,000 to $6,500), interior finishing with drywall, paint, trim, and flooring ($8,000 to $15,000), and permits plus professional drawings ($3,000 to $6,000). These numbers reflect 2026 Metro Vancouver pricing, where labour rates for skilled trades have risen significantly.

When you add a full bathroom (toilet, sink, and shower or tub), several major cost categories come into play that do not exist in a dry conversion.

Underslab plumbing is the most expensive single element. Most garage slabs in Metro Vancouver were poured without any drain connections, which means your plumber needs to saw-cut the concrete slab, excavate trenches for drain and supply lines, install new drain pipes connecting to the home's existing sewer lateral, backfill, and patch the concrete. This work alone costs $5,000 to $12,000 depending on the distance to the nearest sewer connection, the depth of the existing drain, and whether any complications arise (tree roots, deteriorated clay pipe, or inadequate slope for gravity drainage). In areas of Metro Vancouver with older homes — East Vancouver, New Westminster, parts of Burnaby — the existing sewer laterals may be clay pipe in questionable condition, and your contractor may recommend a camera inspection ($300 to $500) before connecting.

Bathroom fixtures and installation add another layer of cost. A mid-range three-piece bathroom with a tiled shower stall, vanity with sink, and toilet typically costs $4,000 to $8,000 for materials and $3,000 to $6,000 for installation in Metro Vancouver. This includes the tile work, waterproof membrane in the shower (a code requirement that protects against moisture damage — especially critical in Vancouver's marine climate), plumbing fixture connections, and finishing details. If you opt for a bathtub/shower combination instead of a standalone shower, material costs are similar but installation may be slightly less.

Ventilation requirements for a bathroom add cost that a dry conversion avoids. The BC Building Code requires mechanical ventilation in all bathrooms, and the vent must exhaust to the exterior — not into the attic or wall cavity. Installing a bathroom exhaust fan with exterior ducting runs $500 to $1,200. Waterproof drywall or cement board in wet areas adds approximately $500 to $1,000 beyond standard drywall costs.

Water supply lines need to be extended from the house to the garage bathroom. If the home's existing plumbing runs near the garage (which is common when the garage shares a wall with a kitchen or laundry room), this is relatively straightforward — $1,000 to $2,500 for hot and cold supply lines. If the plumbing is on the far side of the house, the run is longer and more complex, potentially adding $2,000 to $4,000.

The value proposition depends on how you plan to use the space. A dry conversion is ideal for a home office, studio, gym, playroom, or media room — spaces where plumbing adds no functional value. A bathroom becomes essential if the space will serve as a bedroom (guests or family need washroom access), a rental suite (tenants expect a bathroom), or an in-law suite. In Metro Vancouver's rental market, a converted garage with a bathroom can generate $1,200 to $1,800 per month in rental income, compared to limited rental appeal for a space without plumbing.

From a return on investment perspective, the bathroom adds roughly $15,000 to $30,000 in conversion cost but can add $30,000 to $60,000 in assessed property value for a well-executed conversion in Metro Vancouver, and substantially more if the space is configured as a legal secondary suite. The key is ensuring the plumbing work is done properly with permits — unpermitted bathroom additions are a red flag for home inspectors and can create significant complications when selling.

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