Property due diligence checklist for Australian buyers

Ask ten buyers what due diligence they did before their last offer and most will list two or three things: a building inspection, a scan of recent sales, maybe a quick read of the contract. The full checklist has closer to forty items across seven categories, and the ones people skip are usually the ones that cost the most. A flood overlay across the back of the yard, an easement under the planned extension, a strata fund three special levies deep: none of these show at an open home, and all of them are public information you can check before you exchange.

This is the complete property due diligence checklist for Australian buyers. It is organised into the seven categories that matter, with what to check, why it matters, and the rough time and cost of each. Where a check is free and you can do it yourself in minutes, we say so. Where it needs a professional, we say that too. If you want the argument for why this work pays for itself before you dive into the list, start with why property due diligence is the cheapest insurance you will ever buy.

What property due diligence actually covers

Due diligence is the structured investigation of a property before you are legally committed to buy it. It spans four questions:

• Is the title clean? Who owns it, and what is registered against it.
• Is the land constrained? Zoning, overlays, easements and hazards that decide what you can and cannot do.
• Is the building sound? Structure, pests, services and compliance.
• Do the numbers work? Price against comparable sales, outgoings, and (for units) the health of the body corporate.

The trap is that most buyers do the visible checks (the building inspection, the sales comparison) and skip the invisible ones (the overlays, the easements, the strata fund balance). The checklist below is built so you do not skip a category. Run the free desk checks on every property you are serious about, and commission the paid checks only on the one or two that survive.

1. Legal and title checks

This is where due diligence begins, before you pay for a single inspection.

Title search

Time: 15 minutes. Cost: $20 to $50.

A title search confirms who legally owns the property and reveals everything registered against it: mortgages, caveats, covenants and easements. Order it through your state land registry or ask your conveyancer to pull it. The registered owner on title must match the seller named on the contract.

Easements and covenants

Time: 30 minutes. Cost: included in the title search.

An easement gives someone else a right over part of your land, most often a water, sewer or electricity authority. Anything you build over a registered easement can be dug up or demolished at your cost, without compensation. Restrictive covenants can dictate materials, height, or that only one dwelling may be built. Both are common and both are routinely missed in a fast contract review. We break this down in detail in easements and restrictions on title.

Zoning and planning controls

Time: 10 to 30 minutes. Cost: free.

The zone decides what you can do with the land as of right, what needs consent, and what is prohibited. Layered on top are the development controls (height, floor space ratio, minimum lot size, setbacks) and any overlays. "It is zoned residential" is never the full answer, because two lots in the same zone can permit completely different things once overlays are applied. You can look the zone up on your state planning portal, or read how to check a property's zoning and what you can build.

2. Council and conveyancing searches

These are the document searches your conveyancer runs, and the ones you should understand rather than rubber-stamp.

• The vendor's statement. In Victoria this is the Section 32; in NSW the contract must attach a Section 10.7 planning certificate; Queensland relies on the contract plus your own searches. It discloses zoning, rates, outgoings, and known restrictions. Read it properly. See how to read a Section 32 vendor statement.
• Planning certificate. Confirms the zone, overlays, and whether the land is affected by road widening, land reservation or contamination notices.
• Rates, land tax and outstanding charges. Unpaid council rates, water and land tax can transfer with the property. Confirm what is owing and who clears it at settlement.
• Sewer and water service diagram. Shows the mains, connection point and any sewer easement crossing the lot. A Section 73 or equivalent search costs $30 to $50.
• Building approvals history. Confirm that extensions, decks, pools and granny flats were approved and certified. Unapproved work becomes your liability the day you settle.

3. Building, pest and structural checks

Time: 1 to 2 hours on site, report in 24 to 48 hours. Cost: $400 to $800 combined.

Building and pest inspections are non-negotiable, whether you are buying a house or an investment. The CSIRO estimates around one in three Australian homes is affected by termites at some point, and pests cause the majority of structural damage. A good inspector checks:

• Structural condition: foundations, framing, roof structure and any movement cracking.
• Roof, gutters and waterproofing, especially in wet areas and balconies.
• Electrical and plumbing systems, hot water, and switchboard age.
• Active or historical termite and borer activity, plus conducive conditions.
• Whether renovations were done to code.

If the report finds major defects, you either renegotiate the price to cover them or walk. This is the check most worth its fee.

4. Strata and body corporate checks (units and apartments)

Time: 1 to 2 hours to review, or $300 to $500 for a professional strata inspection.

Buying into strata means buying a share of a shared balance sheet. A strata or body corporate search should tell you:

• The capital works (sinking) fund balance, and whether it is adequate for the building's age.
• Current levies and any special levy that has been struck or foreshadowed.
• Minutes from the last two years, for signs of disputes, defects or major works.
• Insurance currency and whether the building is adequately covered.
• By-laws that affect pets, renovations, parking and short-term letting.

A healthy fund and quiet minutes are green flags. A depleted fund with a looming special levy for concrete cancer or cladding rectification can add tens of thousands of dollars, and is the single biggest avoidable mistake in apartment buying.

5. Environmental and hazard checks

Time: 15 to 30 minutes at the desk. Cost: free.

This is the category buyers skip most and pay for hardest, because hazards rarely show from the street and each one carries its own build cost. Check every layer that applies:

• Flood. The 1% AEP (one in a hundred year) flood level against the dwelling and the yard. A raised minimum floor level can turn a slab build into a piered one.
• Bushfire. The Bushfire Attack Level (BAL). BAL-12.5 is mild; BAL-29 typically adds $30,000 to $60,000 to a build; BAL-FZ (flame zone) adds six figures and raises insurance questions.
• Contaminated land. Historical industrial, service-station or agricultural use, checked against the state EPA register and old aerial imagery.
• Coastal hazard. Erosion and inundation lines, relevant on much of the Queensland, NSW and WA coast.
• Acid sulfate soils, landslip and mine subsidence where the mapping applies.

Each of these is a data layer held by a council, state or federal spatial service. The overlay does not go away because you did not check it; skipping the query just defers the discovery to a more expensive moment. See five hazard overlays buyers miss.

6. Financial and contract checks

Time: 2 to 3 hours. Cost: free, or a conveyancer's contract review fee.

• Comparable sales. Recent sales of genuinely comparable properties in the immediate area, adjusted for size, condition and position. Your offer should sit inside that range unless you can articulate why you are paying above it.
• Contract of sale. Have a conveyancer or solicitor read it before you sign. They flag special conditions, unusual clauses, easements and covenants.
• Deposit and settlement terms. Confirm the deposit (commonly 10%) and that the settlement period (typically 30 to 90 days) suits your finance.
• Cooling-off rights. Know whether your state and contract type give you a cooling-off period, and how long.
• Finance and valuation. Confirm your lender will value the property at or above your price, especially for units and unusual dwellings.

7. Neighbourhood and market checks

Time: 1 to 2 hours. Cost: free.

• Suburb profile: median price and price trend, days on market, and the buyer-to-seller balance.
• For investors: vacancy rate (below 2% is tight), median rent and rental trend, and tenant demographics.
• Planned change: infrastructure, rezoning and development applications nearby that could lift or dent value.
• The lived reality: visit at different times, check noise corridors near rail and arterial roads, and walk the street after dark.

How to run the checklist without burning weeks

You do not run all forty items on every property. You sequence them:

1. Desk filter, every serious candidate (free, about 30 minutes): zoning, overlays and hazards, easements on title, and comparable sales. Reject anything that fails here before you spend a dollar.
2. Document searches, the survivors: vendor's statement, planning certificate, rates and sewer diagram.
3. Paid inspections, the final one or two: building and pest, strata report, contract review by your conveyancer.

This order stops you paying for a building inspection on a property that an overlay would have ruled out in the first ten minutes.

• Planning tab: zone, permitted uses, height, floor space ratio and minimum lot size (checklist items in sections 1 and 2).
• Hazards tab: flood, bushfire BAL, coastal, landslip and acid sulfate overlays (section 5).
• Title and heritage context: easements, heritage and character overlays, and contamination signals (sections 1 and 5).
• Suburb tab: median price, recent sales and rental yields (sections 6 and 7).

A SafeBuy report is $23 and returns in under 60 seconds, querying the same council, state and federal data a town planner reads. It does not replace a title search, a building and pest inspection, a strata report, or your conveyancer's contract review: those are the paid checks in sections 3, 4 and 6. What it does is compress the desk research from a day of portal-hopping into one page, so you know which properties are worth the paid checks at all. You can run a free report on any address to see the risk layers before you commit.

The property due diligence checklist, in one place

• Title search ordered; registered owner matches the seller
• Easements and covenants identified
• Zone, permitted uses and development controls confirmed
• Vendor's statement / planning certificate read in full
• Rates, land tax and outstanding charges confirmed
• Sewer and water service diagram checked
• Building approvals for extensions, decks and pools verified
• Building and pest inspection completed
• Strata search and fund balance reviewed (units)
• Flood, bushfire, contamination and coastal overlays checked
• Comparable sales support the offer price
• Contract reviewed by a conveyancer or solicitor
• Deposit, settlement and cooling-off terms understood
• Suburb, vacancy and planned-change research done

Due diligence is not about finding a perfect property. It is about knowing exactly what you are buying before you are committed, so the surprises are ones you priced in rather than ones that change your life. Work the checklist top to bottom, filter hard at the free stage, and spend on the paid checks only where a property has earned them. For the full step-by-step process from first inspection to exchange, read buyer due diligence: how to check a property before you buy.