How to get renovation quotes for a flip in Australia

The renovation quote is the single number on your feasibility most likely to be a fantasy, and it is the one beginners guess at. You would never set your after-repair value off a hunch, yet plenty of people buy a flip on a builder mate's "yeah, about eighty grand" and then wonder where the profit went. Learning how to get renovation quotes you can actually trust, and compare side by side, is what turns your reno line from a guess into a number you can defend. Get it right before you exchange and the whole deal stands on solid ground.

This is general information, not financial, legal or building advice, so treat it as a starting point and get your own licensed people across the specifics of your job.

Why the renovation quote decides the deal

On a flip you make your money when you buy, and the buy price is only as good as the numbers behind it. Your maximum offer is worked backwards from the resale value minus every cost, and the reno is usually the second-biggest cost after the purchase itself. If that figure is soft, your maximum offer is soft, and you can overpay for a property without ever knowing it.

That is why quotes are due-diligence work, not something you sort out after settlement. A vague allowance is how a flip that looked like a $60,000 profit turns into a break-even when the real invoices land. Treat the reno number with the same rigour you would treat your comparable sales, because it swings the deal just as hard. The whole process fits inside the wider how to flip a house in Australia playbook; this is the reno-costing piece done properly.

Get your own number before you ask for a single quote

Walk in with your own estimate first. If you have no idea what the work should cost, you cannot tell a sharp quote from a rip-off, and you will get anchored to whatever the first builder says. A baseline is your bunkum detector.

Build it two ways. Sanity-check the total against a realistic renovation cost per square metre for the scope you are planning, then itemise it properly with the reno estimator or the renovation cost calculator so you have a line-by-line figure, not a round number. Now when the quotes come back you can see which trades a builder has under-cooked to win the job, and which are genuinely priced. Pair that with the renovations that actually add value so you are only pricing work a buyer will pay you back for.

How to get renovation quotes you can compare

Here is the fix that solves ninety per cent of quoting problems: write a scope of works before you ask anyone to price it. A scope is a plain document that lists every item of work, room by room, with the finish and the fittings named. "Renovate bathroom" is not a scope. "Strip to studs, waterproof, tile floor and walls to ceiling, supply and install vanity, toilet, shower screen, tapware to a $1,500 PC allowance" is a scope.

The reason is simple. If three builders price off the same detailed scope, their quotes are genuinely comparable, because they are all pricing the same job. If you hand them a vague brief, one assumes budget fittings, another assumes premium, a third leaves out the waterproofing, and the cheapest quote is often just the one that left the most out. You are then comparing three different jobs and calling it a bargain. A written scope forces every quote onto the same footing and strips the guesswork out of the comparison.

Give each builder the same documents, the same access, and the same deadline, and ask for the price broken down by trade or by room rather than as one lump sum. A breakdown is what lets you interrogate the number instead of just accepting it.

How to read a builder's quote and where the traps hide

A quote is only as honest as its exclusions. Read those first. The number at the bottom means nothing until you know what it does not include.

Watch for these:

Provisional sums and PC items. A provisional sum is the builder's allowance for work not yet fully scoped; a prime cost (PC) item is an allowance for a product you have not chosen yet, like tapware or a benchtop. They are normal, but if the allowances are set low the quote looks cheap and blows out later when reality costs more. Check every allowance against your own baseline.

Exclusions and "by others." Anything marked excluded or "by others" is a cost you carry, not the builder. Skip bins, temporary fencing, council fees, appliances and landscaping are common ones.

GST. Confirm whether the price includes GST. A quote that quietly excludes it is ten per cent light before you start.

Payment stages. A fair progress schedule ties payments to completed stages. Be wary of a large deposit demanded up front, and know that in New South Wales the maximum deposit on residential building work is capped by law.

If a "quote" arrives as a single verbal number or a one-line text, it is not a quote, it is a guess with a person attached. Get it in writing with the scope referenced, or do not count it.

Check the licence and the insurance before you sign

This is the fast, non-negotiable vetting step, and it is where a few verifiable facts matter. In New South Wales, residential building work valued over $5,000 including GST must be done under a written contract by a licensed contractor, per NSW Fair Trading. For work over $20,000, the builder must also hold Home Building Compensation cover before taking a deposit or starting, which protects you if they become insolvent, disappear or lose their licence, as icare sets out. If that cover is not actually in place, a builder going bust part-way through the job can leave you badly exposed, so confirm the certificate for your specific job exists before you pay. The dollar thresholds and the insurance scheme differ by state, so check the register that applies to your job: NSW Fair Trading, the Victorian Building Authority, or the Queensland Building and Construction Commission (QBCC).

Two minutes on the state regulator's public register tells you whether the licence is real, current, and the right class for the work. Do it for every builder you are seriously considering, confirm they carry the required insurance, and ask for a couple of recent references you actually call. Whether you use a licensed builder at all, or coordinate trades yourself, changes your obligations, so read whether you need a licence to flip a house and the insurance you need to renovate before you decide who runs the site.

How many quotes, and when to get them

Three written quotes off the same scope is the practical sweet spot. One gives you no comparison, two can be a coin toss, and past three or four you are just delaying the job. You are not automatically taking the cheapest; you are looking for the most complete quote from someone licensed, insured and available in your timeframe.

Timing is the tricky part on a flip. Ideally you price the work before you are locked in, but you rarely have full access to a property you do not own yet. Use what you can: a thorough building and pest inspection to scope the structural surprises, open-home visits to measure and photograph, and your own itemised baseline to carry the deal through feasibility. Where the state allows it, a cooling-off period or a subject-to-inspection clause can buy you the time to firm up quotes before the deal is unconditional. Line up your trades and your builder early so the job can start soon after settlement, because every extra week of empty house is holding cost eating your margin.

A tight scope is your best protection against variations

Variations are where budgets die. A variation is any change to the agreed scope, and each one is a chance for the price to climb and the timeline to stretch. Some are unavoidable, like the rot you only find once the wall is open. Most are not; they come from a scope that was too loose to hold.

The defence is the same document that got you comparable quotes. A detailed, signed scope means there is far less to argue about, because the work was agreed in writing up front. Hold a genuine contingency on top, keep decisions ahead of the trades so nobody is standing around waiting on you, and manage the build tightly once it starts. I have written up running the job day to day in how to manage a renovation on a flip, and who to have around you in who you need on your team to flip a house.

Turn the winning quote into your feasibility number

Once you have a quote you trust, it stops being a quote and becomes a hard input. Drop it into the flip ROI calculator alongside your purchase costs, holding costs and selling costs, and the profit that comes out is one you can actually stand behind. Model the strategies a block supports with feasibility, and see how the reno figure sits inside a full deal in the sample analysis or the wider cost to flip a house breakdown.

Do the quoting properly and you remove the biggest source of nasty surprises on a flip. A scope, three comparable written quotes, a quick licence and insurance check, and a real number in your feasibility. That is the difference between hoping a flip works and knowing it does before you spend a cent.

This is general information only and is not financial, legal or building advice. Licensing rules, insurance requirements and building costs vary by state and change over time, so verify the current requirements for your job and engage your own licensed builder and qualified advisers before you contract any work.