Bathroom Renovation in Mount Waverley

If the renovation strips the shower area back to the substrate, waterproofing must be redone — a failed membrane is the most expensive bathroom defect there is, because the fix means demolishing finished tiling. Several countries regulate wet-area waterproofing explicitly. Never let a contractor tile directly over an old or damaged membrane.

Keep the existing layout, choose mid-range fittings from stocked lines rather than special orders, use large-format tiles only on feature areas, and paint rather than tile ceilings and upper walls. Do not economize on waterproofing, drainage falls, or the tiler's labour — those are the items whose failure costs multiples later.

Strip-out, then first-fix plumbing and electrics (pipes and cables in walls), then substrate preparation and waterproofing, then tiling, then second-fix (toilet, vanity, taps, shower screen, lights), then silicone and snagging. If a quote or schedule doesn't follow this order, question it — out-of-sequence work is how leaks and redone tiles happen.

It can work on sound, well-bonded wall tiles and saves strip-out cost, but it fails on floors with movement, adds thickness that fouls doors and fittings, and hides the condition of the substrate and membrane. Most renovators strip back in wet areas — if a contractor proposes tile-over-tile in the shower zone specifically, treat it as a cost-cutting red flag.

In rough order: whether you move plumbing (relocating the toilet or shower is the single biggest multiplier), the quality tier of tiles and fittings, bathroom size, waterproofing scope, and access (upper floors and apartment buildings cost more). Labour typically makes up 40-60% of the total, so a bigger bathroom does not scale cost linearly — fixture count matters more than floor area.

Relocating a toilet means rerouting the soil pipe and adjusting floor levels; moving a shower means new drainage falls and full re-waterproofing. Either typically adds a meaningful share of the total budget and extra days of work. If your budget is tight, keeping the existing layout is the single most effective cost-saver.

The HIA Kitchens and Bathrooms Report puts the median around AUD 26,000-27,000, with budget renovations from about AUD 10,000-15,000 and premium projects AUD 35,000-80,000. Waterproofing, licensed trades, and certification requirements make Australian bathrooms pricier than comparable UK/US work.

State law prohibits unlicensed plumbing and electrical work — fines apply and your home insurance can refuse claims arising from it. DIY is fine for demolition, painting, and assembly-type tasks; everything touching water, waste, or wiring must be a licensed trade with compliance certificates.