BATHROOM RENOVATION COSTS IN WA

Budget renovation

$12,000–$18,000

Basic fixtures, keep layout

Mid-range renovation

$18,000–$28,000

Quality fixtures, minor layout changes

Premium renovation

$28,000–$50,000+

Designer fixtures, full layout change

Ensuite (small)

$10,000–$20,000

Keep layout, quality finishes

Demolition (labour)

$800–$2,500

Strip to frame

Waterproofing

$600–$1,200

Wet area membrane

Tiling labour

$2,500–$6,000

Floor and walls

Plumbing labour

$2,500–$5,500

Fixtures and connections

Electrical labour

$800–$2,000

Lighting, exhaust, heated towel rail

Vanity installation

$400–$1,200

Supply extra

What you find behind the walls

The most common bathroom renovation problem in Perth is discovering the original waterproofing — or lack of it — once demolition begins. Homes built between 1960 and 1995 in suburbs like Noranda, Balga, Girrawheen and Gosnells often have no waterproofing membrane at all. When found, the scope expands — substrate repair, membrane application and re-tiling. Include a provisional sum for substrate repair in the scope agreement before work starts.

Layout changes multiply cost

Moving the toilet, shower or bath requires relocating plumbing waste lines — in a slab home this means cutting and re-routing concrete. This alone adds $2,000–$5,000. Budget carefully for any layout changes and always get a plumber to assess feasibility before committing to a design that moves fixtures.

Trade sequencing in Perth heat

Perth's summer heat affects waterproofing membranes and adhesives — both have temperature application ranges. Tiling too soon after waterproofing in 38°C heat leads to adhesion failures. Professional Perth tilers schedule bathroom work for early morning and avoid tiling in direct afternoon sun in summer.

Fixture and tile quality variance

The same bathroom renovation can vary by $8,000–$15,000 based purely on fixture and tile selection. A Reece or Tradelink mid-range package costs $3,000–$5,000 in fixtures. Imported European brands run $8,000–$20,000. The labour to install them is identical. Be clear on your product budget before the consult.

What provisional sum is included for substrate repair on demolition?

Does the quote include waterproofing — which product and to which standard?

Who manages trade sequencing and what is the schedule?

Will the plumber provide a Form 5 and the electrician a Certificate of Compliance?

What happens to the price if we find degraded substrate or missing waterproofing?

Can I see examples of previous bathroom work in Perth homes of similar age?

What is the payment schedule — are milestones tied to defined completion stages?

Is the layout change feasible without cutting the slab?