The property due diligence checklist for flippers in Australia

A property due diligence checklist is the cheapest insurance you will ever buy on a flip. The deals that go wrong almost never go wrong on the day you sell. They go wrong on the day you exchange contracts, because something you did not check, an easement, a flood overlay, a cracked slab, a zoning that will not allow what you planned, turns out to be sitting in the property the whole time. Due diligence is just the disciplined process of finding those things before you are legally bound, not after.

I run the same checklist on every property, and I run it in four parts: the physical, the legal, the planning and the money. Miss any one of them and you can still lose a deal you thought was a winner. This is how I work through each one. It is general information rather than legal, financial or contract advice, so treat it as a starting point and get your own professionals to check the specifics on any property you are serious about.

What a property due diligence checklist actually covers

Due diligence has a reputation for being paperwork, and that is part of why people rush it. On a flip it is not paperwork, it is the difference between a costed deal and a guess. Every check you run either confirms a number you already had, the resale value, the renovation budget, the holding time, or it uncovers a cost you had not priced. Both outcomes are gold, because both let you either sharpen your offer or walk away before it is your problem.

The four parts below are not optional extras you get to if there is time. They are the whole job. And the order matters less than the discipline: you want every box ticked before you exchange, because after exchange your options shrink to whatever your contract conditions and your state's cooling-off rules give you, and at auction you get none of them.

The physical check: what the building is really worth to you

Start with the building itself, because it sets your renovation budget and your budget sets everything else. A proper building and pest inspection is non-negotiable on a flip. You are not buying a home to live in and forgive its flaws, you are buying a problem to solve at a profit, so you need the problems costed, not glossed over. Structural movement, rising damp, dodgy wiring, illegal additions and termite damage are the ones that turn a cosmetic flip into a money pit.

Walk the property yourself as well, with your renovation in mind rather than a buyer's eye. Where does the money have to go, and where can you leave things alone? The gap between a $40,000 refresh and a $120,000 renovation is the gap between a deal that works and one that does not, and you cannot set that number from the listing photos. If the physical check moves your reno figure, it moves your maximum offer, which is exactly what it is there to do.

The legal check: contract, title, easements and covenants

Next comes the contract, and this is where a good conveyancer or solicitor earns their fee. Get them onto the contract of sale before you make a serious offer, not after. What you are hunting for is anything on the title that limits what you can do or costs you money to deal with: easements that let a neighbour or a utility run pipes, drains or access across the land, and restrictive covenants that dictate what you can build, the materials you can use, or whether you can subdivide at all.

An easement running through the exact spot you planned to extend, or a covenant banning a second storey, can quietly delete the whole reason you liked the deal. These are recorded on the title and disclosed in the contract, so they are findable, but only if someone reads the documents properly. Your solicitor should also confirm that any past renovation was approved and certified, because unapproved building work becomes your liability the moment you own it, and you will have to disclose it when you sell. They should also flag whether the property is sold with a sitting tenant: flipping a house with tenants in it means the existing lease carries over to you, and you cannot start a renovation until you have vacant possession. If there is a pool, the safety-barrier certificate is a contract item in its own right in several states, with its own rescission and rectification rules, so flipping a house with a pool adds a check your conveyancer should run before you exchange.

The planning check: zoning, overlays and what you can build

The planning check answers the question the marketing never will: what does the council actually allow here? Zoning sets the permitted uses and the controls on height, floor space and setbacks, and the overlays sit on top and can stop a deal cold. I have written a full explainer on what LEP and DCP planning rules mean, and a separate guide on how to check flood and bushfire overlays, because those two overlays are the most common margin-killers: they restrict what you can build, blow out your construction costs, and hit resale value and insurance.

This is the check where the right tool saves you hours. FlipPro's full deal analysis pulls live council zoning and overlay data (NSW, VIC and QLD live now) against the actual address, so you can see the planning constraints before you commit, and the feasibility tool tests the strategies a block can genuinely support rather than the ones you are hoping for. If the planning check says the subdivision or the second dwelling will not fly, you want to know that while you can still change your offer.

The money check: comps, feasibility and your ceiling

The last check ties the first three together into a number. Everything you have learned, the reno cost, the legal costs, the planning constraints, feeds a feasibility, and the feasibility gives you the only figure that matters at the negotiating table: your maximum offer. Start from a defensible resale value built on real comparable sales, which is what the ARV calculator is for, then subtract every cost down to a ceiling you do not cross. Run the full picture through the flip ROI calculator, or see how it all fits together on a real property in the sample analysis.

This is also where you sanity-check the deal against the qualities that make a property worth flipping in the first place. If you are unsure, my post on what makes a good flip property lays out the filters I use. A property that fails the money check is not a bad property, it is just a bad price, and a bad price is fixable in negotiation if the vendor is motivated. The feasibility is what tells you where that price sits.

The state-by-state disclosure you should read first

Here is a shortcut most buyers miss: the vendor is often required to hand you a big chunk of your due diligence before you even ask. What is provided differs by state, so read the right document first. I have written a dedicated guide to what a vendor disclosure statement is in each state and how a missing or wrong one lets you out of the contract; the short version follows.

In New South Wales, a section 10.7 planning certificate must be attached to the contract of sale. It sets out the zoning and the planning controls, plus property constraints like flooding, bushfire-prone land and contamination, so it does a lot of your planning check for you. In Victoria, the vendor must give you a section 32 statement, and estate agents are legally required to make the Consumer Affairs Victoria due diligence checklist available to buyers, so use both. In Queensland, the seller disclosure scheme that started on 1 August 2025 now requires sellers to give buyers a disclosure statement (Form 2) with prescribed certificates before you sign, covering title, zoning, and any flood or environmental risks. These documents do not replace your own checks, but they give you a running start, and a gap or an error in one can even be grounds to get out of the contract.

Run the checklist before you exchange, not after

None of this is complicated. It is just disciplined, and discipline is what separates flippers who compound from flippers who get one bad deal and quit. Physical, legal, planning, money: run all four before you are bound, use the vendor's disclosure to get ahead, and let anything you find move your offer or end your interest. The whole point is that a surprise you find during due diligence is free, and a surprise you find after settlement is expensive.

If you want to see where due diligence sits in the wider process, the complete guide to flipping a house in Australia puts every step in order. Do the checks first, then decide the number. That order is the entire game.

This is general information only and is not financial, legal, tax or contract advice. Disclosure obligations, planning certificates, cooling-off rights and contract rules change and vary by state, so confirm the current position for your state and engage a licensed conveyancer or solicitor, a qualified building inspector and your own professional advisers before making or signing any offer.