A First-Time Homeowner's Guide to Bathroom Renovation

Updated September 2026 · 9 min read

Nobody's first renovation goes smoothly, but most of what goes wrong isn't bad luck — it's not knowing the order things happen in. Decisions get made late, when they're expensive, instead of early, when they're free.

This is the whole arc, start to finish: seven phases, what each one asks of you, and roughly how long it takes.

The shape of the project

Total: often three to four months from first thought to finished room, with three to six weeks of actual construction. The planning is longer than the building, and that's correct.

The most common first-timer mistake is compressing phases 1–4 into a weekend and then spending phase 6 making decisions under pressure.

Phase 1: Decide what actually needs to change

Start with problems, not products. Write down what's wrong with the bathroom you have: no storage, the shower is cramped, the light is bad, it's dated, there's mould in the corner.

Then separate the list:

• Must fix — anything failing. Leaks, rot, no ventilation, unsafe electrics.
• Want to fix — the daily irritations. Storage, layout, light.
• Would be nice — the aesthetics.

This ordering matters because the budget will get tight, and when it does you want to cut from the bottom. Without the list you'll cut whatever is least visible, which is usually in the first category.

Then answer the question that dominates the budget: does the plumbing move? Keeping the toilet, sink and shower where they are keeps the project in a predictable band. Moving them means opening the floor and re-routing drains — often the difference between a mid-range and a high-end budget.

Phase 2: Set a budget you can hold

Write down the maximum you can spend, then subtract 15% and call it contingency. Plan the project with what's left.

The 15% isn't pessimism. Bathrooms hide their problems behind tile and under floors, and demolition regularly turns up rot, failed subfloor, or wiring that isn't to code. A reserve makes those a phone call instead of a crisis. If you finish without touching it, you've got 15% back.

Our budgeting guide covers where the money goes and what each scope realistically costs. The headline: labour is typically 40–55% of the total. A budget built from material prices will come in low.

Phase 3: Design and selections — do this before you hire

This is the phase first-timers skip and later wish they hadn't.

Choose everything: tile (and grout colour), vanity, countertop, sink, faucet, shower valve and matching trim, showerhead, toilet, glass, mirror, lighting, fan, paint, hardware, accessories. Write it into a list with model numbers.

Why now rather than during construction:

• Selections drive construction. A shower valve's rough-in body goes in before tile. Vanity dimensions set plumbing heights. Choosing late means guessing early and reworking later.
• Lead times are real. Custom glass and specialty tile can take weeks. A crew waiting on your tile is a schedule slipping.
• You'll choose better. Eleven decisions made calmly beforehand beat eleven made under pressure in a torn-apart house.

Phase 4: Hiring

Get three bids on the same written scope. Handing each contractor your own scope of work is what makes their prices comparable; without it, three numbers tell you nothing. See what to include in a scope of work.

For each candidate, check:

• Licence and insurance — verify both directly, not from a photocopy. Liability and workers' compensation.
• References from finished bathrooms, ideally 1–2 years old so you hear how the work aged.
• Whether they pull the permit in their own name. If they ask you to pull an owner-builder permit for their work, that's a warning sign.
• A written contract with scope, milestone-based payments, a change-order process, and a warranty.

On price: the lowest bid is usually low for a reason — a thinner waterproofing spec, lower allowances, or something omitted. Ask what's different rather than assuming a bargain. The middle bid on a detailed scope is often the honest one.

Be wary of a large upfront deposit. Payments should track completed work.

Phase 5: Permits

If plumbing, electrical, structure or ventilation changes, you almost certainly need a permit. Cosmetic like-for-like replacement usually doesn't. Rules are local — one call to your building department settles it. Full detail in our permits guide.

The rough-in inspection is worth welcoming rather than enduring: it's a qualified independent person checking the plumbing, wiring and waterproofing inside your walls at the last moment anyone can see them.

Phase 6: Construction

Typical order:

1. Protection and demolition — 1–3 days
2. Rough-in — plumbing, electrical, framing changes — several days
3. Inspection — work pauses until it happens
4. Waterproofing — the step whose quality you'll never see again
5. Drywall and prep
6. Tile — usually the longest single phase, and it has curing time built in
7. Paint, fixtures, vanity, glass templating and install
8. Final inspection and clean

Glass is often last because it's templated to the finished tile — which is why it arrives as a late, surprising invoice.

What nobody warns you about

• Dust travels. Even with barriers, fine dust reaches the whole house. Move what you care about out first.
• Losing a bathroom is worse than expected. If it's your only one, plan seriously — this is a genuine reason to stage the work or arrange to stay elsewhere.
• There are quiet days. Waiting on inspection, curing, or a delivery is normal and doesn't mean you've been abandoned.
• You will be asked to decide things quickly. Every unmade decision becomes urgent. This is why phase 3 exists.
• It looks worse before better. The middle of a remodel is uniformly grim.

Phase 7: The punch list

Don't make the final payment on the day it looks finished. Walk the room properly, in good light, with time:

• Run every tap and the shower; check drainage and look for slow leaks under the vanity
• Flush the toilet several times; check it doesn't rock
• Open and close every drawer, door and the shower door
• Test every switch, outlet, and the GFCI's test button
• Run the fan — hold tissue to it to confirm real suction
• Check grout and silicone lines, especially in corners and where tile meets tub or floor
• Look along tile in raking light for lippage and uneven joints
• Check paint edges, caulk lines, and trim

Write the list, agree a date for it to be closed out, and hold a meaningful final payment until it is. Then get the warranty, the permit sign-off, and the model numbers of everything in writing — you'll want them in five years when a cartridge fails.

First-timer checklist

Frequently asked questions