Ask three renovators how long a bathroom takes and you will get three answers, all of them technically true. The variation is not evasiveness. It reflects the fact that a bathroom is a small room in which eight trades have to work in a fixed sequence, and every one of those handovers is a place where days go missing.
Here is a realistic program for a standard full bathroom renovation in an Australian home, and an honest account of what stretches it.
The short answer
- Cosmetic refresh (no new membrane, same layout): 1 to 2 weeks.
- Small bathroom or powder room: 2 to 4 weeks.
- Full bathroom renovation, same footprint: 3 to 5 weeks on site.
- Layout change or wet room build: 4 to 6 weeks.
- Structural work, moved walls or windows: 6 to 10 weeks, plus approvals beforehand.
Those are on-site figures. They start on demolition day. The planning, selections and lead times that come before demolition day are usually longer than the build, and are where most of the real delay hides.
Week by week
Week one: strip out and rough-in
Days one and two are demolition. Fixtures out, tiles off, sheeting removed, everything down to the frame and the slab or joists. This is when the bathroom tells you the truth about itself: rotten bearers under a leaking shower, corroded copper, framing that is 40mm out of plumb, and occasionally asbestos sheeting that stops the job until a licensed removalist has been and gone.
Days three to five are rough-in. The plumber sets the new waste and water points, the electrician runs cabling for lighting, exhaust and any heated floor, and the carpenter installs noggings for the vanity, rails and screen fixings. Nothing looks like progress this week, and everything that follows depends on it being right.
Week two: substrates and waterproofing
New wet-area sheeting goes on, the floor is levelled or screeded to the correct fall, and the waterproofer applies the membrane. Membranes need to cure. Depending on the product and the weather, that is one to three days when nobody can work in the room, and pushing tiling forward into that window is the most common cause of a bathroom that leaks in year three.
This is also the week the waterproofing certificate is generated. Ask for it, keep it with the property records, and do not accept "the tiler did it" as an answer.
Week three: tiling
Tiling is the longest single trade and the one most sensitive to your choices. A single large format porcelain on floor and walls might take four days. The same room in a herringbone pattern with a mosaic shower floor and three niches can take eight. Grouting and silicone follow, and grout also needs curing time before anything gets wet.
Week four: fit-off and finish
The plumber returns to install the vanity, basin, toilet, tapware and shower rose. The electrician fits lights, the exhaust and the switches. The screen installer measures on site (frameless glass is almost always measured after tiling, then made, which is a three to ten day gap on its own), and the painter does the ceiling and any make-good. Final clean, defect walk, done.
What actually causes delays
- Fixture lead times. An imported vanity or a made-to-order stone top can be 8 to 14 weeks. If it is not ordered before demolition, the job will wait for it. This is the single biggest avoidable delay.
- Late selections. Choosing tiles in week two means the tiler is booked for a week you cannot use. Finalise every selection before the first hammer swings.
- Hidden damage. Water damage, rot, old wiring or non-standard framing found on day two. Add days, and a variation.
- Asbestos. Common in pre-1990 wet areas. Licensed removal and a clearance certificate can add a week.
- Changing your mind. Moving the shower after rough-in means undoing work that is already certified. It is the most expensive and most disruptive thing a homeowner can do.
How to make it faster
Not by pressuring the trades. Curing times are physics. What you can control is everything upstream: have all selections locked and all long-lead items on site before demolition, agree a written program with the renovator, agree a variation process in advance, and be reachable for the three or four decisions that will come up mid-job. Renovations that finish on time are almost always ones where the homeowner did their part before week one.
Plan around it
If it is your only bathroom, assume you will be without it for the entire program, not just part of it. Arrange a portable toilet, a gym membership or a stay with family for the tiling and waterproofing weeks. And do not book a family event for the week after the scheduled finish date. Book it for two weeks after.
Ready to get numbers on your own bathroom? Send one brief and up to three licensed Sydney renovators will quote the same scope, free and with no obligation. Start your brief.
