The Bathroom Renovation Checklist: Every Decision in Order

By the WTD team · Updated June 2026

Every renovation decision made after demolition costs more than the same decision made before it. This checklist sequences the lot — scope, selections, quotes, approvals, logistics and handover — against What's The Damage's July 2026 re-verified national bands of $10,000–$55,000, so the spend lands where you chose, not where the schedule forced it.

Why sequence beats enthusiasm

Bathroom renovations don't usually fail on workmanship — they fail on ordering. A tile chosen after demolition holds the site hostage for its lead time. A layout question raised at rough-in reprices the plumbing. A certificate nobody asked for at handover becomes a resale problem years later. The checklist below sequences every decision so each one is made while it's still cheap, working backwards from demolition day. Six phases, each with a timing window and a short list of actions that genuinely matter.

Phase 1 — Scope and budget (6–10 weeks out)

Start by picking a tier honestly. What's The Damage's July 2026 re-verification across 90+ sources puts basic renovations at $10,000–$20,000 nationally, mid-range at $20,000–$35,000 and premium at $35,000–$55,000 — and knowing which band you're operating in disciplines every later decision. Then make the single biggest cost call in the whole project: does the layout stay or move? Keeping the toilet, shower and basin where they are keeps the budget in finishes; relocating them moves it into drainage. Measure the room properly, decide what happens to the bath, and note how the household showers while the room is out of action. Finally, set a contingency — ten to fifteen per cent is the working convention, and homes built before 1990 should hold the top of that range for what strip-out might reveal.

Phase 2 — Design and selections (4–8 weeks out)

Every fixture and finish gets chosen now, before anyone quotes and long before anyone demolishes: tiles (with quantities and spare boxes from the same batch), vanity, toilet suite, tapware, shower system, screen style, lighting, exhaust, mirrors and accessories. Build a lead-time list as you go — custom vanities commonly run four to eight weeks, imported tiles and stone tops can run longer — and order the long-lead items as soon as the design is locked. Plan the invisible things while planning the visible: where the exhaust ducts to, how the lighting layers, whether wall blocking should go in for future grab rails while the frames are open. Selections made in this phase cost a decision; the same selections made mid-build cost a delay.

Phase 3 — Quotes and contracts (4–6 weeks out)

Get three quotes against the same written scope — same fixtures, same layout, same finish schedule — or the numbers can't be compared. Check every licence against your state or territory's public register, and confirm current insurance. Then read for what's included rather than the total: waterproofing and who certifies it, rubbish removal, the shower screen, and the compliance certificates you'll hold at the end should all be inside the price. Agree staged payments tied to completed milestones rather than calendar dates, keep the deposit modest, and establish the variations rule before it's needed: nothing changes scope or price without being written down and signed by both sides. The cheapest quote missing these protections is rarely the cheapest job.

Phase 4 — Approvals and compliance (run in parallel)

A like-for-like renovation — same layout, same footprint — generally doesn't need planning approval. Layout changes, structural work, window alterations and anything touching drainage can, and requirements differ between states, territories and councils, so confirm before contracts are signed rather than after. Apartment owners have a second layer: strata approval, which typically brings its own waterproofing standards, working-hours limits and access conditions. None of this is difficult; all of it runs on clocks measured in weeks, which is exactly why it sits in parallel with quoting rather than after it.

Phase 5 — Pre-start logistics (1–2 weeks out)

The unglamorous week that protects the schedule. Receive and check every delivery — tiles inspected against batch and shade numbers, fixtures unboxed and checked for damage, because a cracked basin discovered at fit-off is a fortnight's delay. Agree where the skip sits and how trades access the room, and protect the path with floor coverings. Clear the bathroom and the rooms along the access route of anything valuable or dust-sensitive. Confirm the downtime plan: which days the toilet is unusable, which days the water is off, and what the fallback is. Exchange keys or access arrangements, agree working hours, and give the neighbours a heads-up — small courtesies that pay off across a multi-week build.

During the build — the owner's five jobs

Once trades are on site, the owner's job compresses to five things. Stay reachable — most mid-build questions need answers in hours, not days, and unreachable owners create idle sites. Inspect at the two milestones that matter most: after rough-in, while the fixture positions can still be sanity-checked, and after waterproofing, before tiling hides it forever. Keep every variation written — scope, price, signature — however friendly the conversation that produced it. Pay against completed milestones only. And keep a simple decision log; on a five-week job, memory is not a filing system.

Handover — the paperwork that matters later

The renovation isn't finished when the silicone cures; it's finished when the folder is full. Collect the waterproofing certificate, the plumbing compliance certificate and the electrical certificate of safety — these are the documents a future sale will ask for. Gather the warranties: membrane, shower screen, tapware, vanity, and the workmanship warranty on the job itself. Take the care instructions for stone and grout seriously enough to file them. Then do the final walkthrough in daylight, list any defects in writing, and agree the rectification window before the final payment is released. Ten minutes of paperwork at handover is the cheapest insurance the whole renovation offers.

Frequently asked questions

What should I decide before starting a bathroom renovation?

Three things, in order: which national cost tier you're operating in ($10,000–$20,000 basic, $20,000–$35,000 mid-range, $35,000–$55,000 premium), whether the layout stays or moves — the single biggest cost fork in the project — and every fixture and finish selection, locked before demolition rather than during the build.

When should I order tiles and fixtures for a renovation?

As soon as the design is locked, typically four to eight weeks before demolition. Custom vanities commonly carry four-to-eight-week lead times and imported tiles or stone can run longer. Everything with a lead time should be ordered, delivered and checked against batch numbers before strip-out begins.

Do I need council approval to renovate a bathroom?

A like-for-like renovation — same layout, same footprint — generally doesn't need planning approval. Layout changes, structural work and window alterations can, and requirements differ between states, territories and councils, so confirm before signing contracts. Apartment owners also need strata approval, which usually brings its own waterproofing standards and working-hours conditions.

What certificates should I receive at the end of a bathroom renovation?

The waterproofing certificate, the plumbing compliance certificate and the electrical certificate of safety, plus warranties for the membrane, shower screen, tapware and workmanship. These are the documents a future sale will ask for — collect them before releasing the final payment, not after.

How much contingency should I hold for a bathroom renovation?

Ten to fifteen per cent of the budget is the working convention. Homes built before 1990 should hold the top of that range, because strip-out is where surprises live: water-damaged framing, non-compliant old plumbing, or asbestos sheeting requiring licensed removal.

When should I inspect the work during a renovation?

At the two milestones that matter most: after rough-in, while fixture positions can still be sanity-checked, and after waterproofing, before tiling hides it forever. Then a final daylight walkthrough with a written defect list before the last payment is released.