SummitBridge
Plan a reno
that won’t blow out
Before a wall comes down, the budget, the approvals and the order of works are already decided. Here’s how to plan an Australian renovation properly — and know exactly where DIY stops and a licensed trade begins.
Decide what you’re actually renovating, and why
A clear brief is the cheapest thing you’ll ever produce — and the single biggest defence against a blow-out. Settle these before you call anyone.
- Needs vs wants. Separate the things the room must do from the finishes you’d love. Wants are the first thing to flex when the number gets tight.
- How long you’ll stay. A forever-home renovation justifies different spending to one you’ll sell in three years.
- Your home’s era. A Queenslander, a Federation cottage and a brick-veneer project home each want very different approaches.
- Where the line sits. Mark the jobs you’ll do yourself and the ones a licensed trade must handle — before you cost anything.
Photograph everything first
A full set of “before” photos helps with quotes, approvals and your own memory of how services run behind the walls.
Live in the space
Spend a week noticing how the room really fails you — bad light, no bench space, a door that fights the fridge — before you redesign it.
Don’t move the wet areas
Keeping plumbing and drainage roughly where they are is the easiest way to keep a kitchen or bathroom reno affordable.
Rough out the number before you fall in love
Set an indicative range first, then refine it with written quotes. Use the planner to start the conversation — it’s educational only.
Educational estimate only — not a quote. Always get written quotes from licensed trades.
Build the line items
Trades, materials, fixtures, waste removal, hire and approvals — list them all so nothing ambushes you mid-build.
Add 10–15% contingency
Older homes hide surprises — old wiring, damp, asbestos, non-standard framing. The contingency is not optional.
Get three written quotes
Compare on scope, not just price. A cheap quote that omits make-good or rubbish removal isn’t cheaper.
Spend where it shows
Put money where hands and eyes land — benches, tapware, lighting — and save on the things nobody touches.
Where a mid-range kitchen budget tends to land
Indicative proportions only — every home, finish and trade differs.
A reno runs in a sequence — tap each stage
Do things out of order and you pay to redo them. This is the path almost every renovation follows.
Lock the brief and a firm budget ceiling with contingency. Sanity-check feasibility against your home’s structure and your council’s rules before committing a cent to design.
Turn the brief into measured plans and a finishes schedule. Good documentation is what lets trades quote accurately and stops costly mid-build decisions.
Confirm whether the work is exempt, complying development or needs full council approval. Wet areas, structural changes and decks frequently require sign-off from a building certifier.
Isolate services and test pre-1990 homes for asbestos before disturbing anything. Careful strip-out is a stage where DIY genuinely saves money — provided you know what you’re cutting into.
Electrical, plumbing and gas rough-in — licensed-trade territory, no exceptions. Sequence them so nothing gets closed up before it’s inspected and signed off.
Waterproofing, tiling, cabinetry, painting and the final fixtures. The most visible, most rewarding stage — and where measured, patient DIY pays off best.
What needs approval — and when to stop and call a pro
Some work is licensed-trade only
In Australia, the following must be carried out by appropriately licensed tradespeople — DIY is illegal and dangerous:
- Electrical — any fixed wiring, switchboards, circuits or hard-wired fixtures.
- Gas — appliance connections, lines and cooktops.
- Plumbing & drainage — moving pipes, waste, and most water connections.
- Structural & waterproofing — load-bearing changes and wet-area membranes to Australian Standards.
Always ask for the licence and a compliance certificate for completed work.
When you likely need approval
Rules vary by state and council, but as a rough guide, you should check before you start if your project touches any of these:
Removing or altering load-bearing walls, adding rooms, changing the roofline or the building footprint almost always needs approval and engineering sign-off.
New bathrooms, relocating drainage and waterproofing must meet Australian Standards and are usually inspected. Your licensed plumber will advise on certification.
Above a certain height or floor area, outdoor structures need approval. Setbacks, boundary rules and bushfire (BAL) requirements may also apply in some areas.
Heritage listings, character overlays and flood or bushfire zones add their own controls — even for changes that would otherwise be exempt. Always confirm with your council first.
Get the site ready before the trades arrive
A prepared site runs faster, safer and cheaper. Work through this before any major work begins.
- Order long-lead items early. Cabinetry, stone benchtops, tiles and tapware can take weeks — confirm before demolition so trades aren’t left waiting.
- Check materials on delivery. Count, inspect for damage and confirm dye-lots on tiles before anyone starts laying.
- Set up dust protection. Seal doorways, protect floors and plan a clear path for debris out of the house.
- Book the skip and waste removal. Allow more volume than you think, and separate anything that needs special disposal.
- Test before you disturb. In pre-1990 homes, have suspect sheeting, eaves and vinyl tested for asbestos and use a licensed removalist.
- Plan a temporary kitchen or bathroom. Even a kettle, a microwave and a tub make a long reno survivable.
Timber
Build for where you live
Coastal homes want corrosion-resistant fixings; tropical north needs ventilation and termite-resistant detailing; cold southern homes reward insulation and draught-sealing. The right material in the wrong climate fails early.
Compare materials“The plans we paid for upfront felt expensive — until they stopped three change-orders that would’ve cost ten times as much.”
— Priya & Tom, renovated a 1950s cottage, Adelaide SA
Renovation questions, answered
Many cosmetic renovations need no approval, but structural changes, wet areas, decks over a certain height and additions usually do. Some minor works qualify as exempt or complying development in some states. Always confirm with your local council or a private certifier before starting.
In Australia, electrical, gas, plumbing and structural work must be carried out by appropriately licensed tradespeople. DIY is fine for painting, cosmetic updates, flat-pack joinery and many repairs — we’re always clear about where that line sits.
Allow at least 10–15% on top of your quoted costs. Older Australian homes commonly hide surprises like asbestos, rising damp, outdated wiring or non-standard framing that only appear once work begins.
Yes. Homes built or renovated before the late 1980s may contain asbestos in eaves, sheeting, vinyl and more. Have suspect materials tested and use a licensed removalist for anything beyond very small quantities.
No — it gives a rough, educational range to help you start planning. Real costs depend on your home, finishes and trades, so always get written quotes.