Property Due Diligence in 2026: The Complete Checklist

What Is Property Due Diligence?

Property due diligence is the process of independently verifying everything a seller tells you about a property — and finding everything they don't. It's the gap between what a listing says and what an informed buyer knows.

In Australia, the principle of caveat emptor (buyer beware) still applies in most states. That means the legal and financial risk of missing something significant sits with you, not the agent, not the vendor. A missed planning overlay, an undisclosed structural defect, or a miscalculated borrowing estimate can cost tens of thousands of dollars — sometimes more.

This checklist covers every layer of due diligence a property buyer in Australia should complete before signing a contract.

1. Legal Due Diligence

Review the Contract of Sale

Every property sale in Australia comes with a Contract of Sale prepared by the vendor's solicitor. It's written in their interest, not yours. Before signing anything, your conveyancer or solicitor should review:

Special conditions — any clauses that modify standard terms, particularly around settlement periods, inclusions, or access
Vendor statements (Section 32 in Victoria, Form 1 in SA, etc.) — mandatory disclosure documents covering title, planning, outgoings, and encumbrances
Title search — confirms the vendor actually owns the property and identifies any mortgages, caveats, or easements registered against it
Easements and covenants — restrictions on how the land can be used; drainage easements, building height covenants, and right-of-way arrangements all affect future development

Check Planning and Zoning

Planning overlays determine what you can build, renovate, or subdivide. In Victoria alone, there are over 30 different overlay types — Heritage Overlays, Vegetation Protection Overlays, Flood Overlays, and Bushfire Management Overlays all carry material implications for your ability to develop or alter the property.

Check the planning scheme through your state's planning portal:
- Victoria: planning.vic.gov.au
- NSW: planningportal.nsw.gov.au
- Queensland: developmenti.qld.gov.au

A property in a Heritage Overlay may require council approval for external changes as minor as repainting. A property with a Flood Overlay may affect insurance premiums and financing.

Verify Permits and Building Approvals

Unpermitted building work is one of the most common and costly discoveries made post-purchase. Verify through your local council:

Are all structures on the property (sheds, extensions, decks, granny flats) covered by an approved permit?
Is there an Occupancy Permit or Certificate of Final Inspection for any completed building work?
Are there any open or lapsed permits that haven't been finalised?

Unpermitted structures may need to be demolished or brought up to code at the buyer's expense.

2. Financial Due Diligence

Confirm Your Borrowing Capacity — With Current Rates

Borrowing capacity assessments shift with interest rate changes. Following the February 2026 RBA rate hike to 3.85%, lenders are now assessing borrowers at approximately 9.35% (loan rate plus APRA's 3% serviceability buffer). Pre-approvals issued before February 4 may no longer reflect your actual borrowing limit.

Before making an offer, confirm with your broker:
- What is your current maximum borrowing capacity at today's rates?
- Is your pre-approval still valid, and at what rate was it assessed?
- What do your monthly repayments look like under the current rate environment, and under a scenario where rates rise a further 50bps?

Understand Total Purchase Costs

The purchase price is not the full cost. Budget for:

Cost	Typical Range
Stamp duty	1.4% – 5.5% of purchase price (varies by state and buyer type)
Legal/conveyancing fees	$1,200 – $2,500
Building and pest inspection	$400 – $800
Mortgage registration and transfer fees	$100 – $500
Lender's mortgage insurance (if <20% deposit)	1% – 3% of loan amount
Moving costs	$1,000 – $5,000

First home buyers in most states qualify for stamp duty concessions or exemptions. Check your eligibility before calculating total costs.

Assess Ongoing Costs

Council rates — typically $1,000 – $2,500 per year; confirm with the vendor statement
Body corporate/owners corporation fees — for apartments and townhouses, annual levies can range from $2,000 to $10,000+. Request a full strata report including the administrative and capital works fund balances and any pending special levies.
Insurance — building insurance is generally required by lenders from the date of exchange
Land tax — applies to investment properties above the threshold in most states

3. Physical Due Diligence

Get an Independent Building and Pest Inspection

A vendor may offer an inspection report as part of the marketing — don't rely on it. Commission your own from a licensed inspector who works for you, not the seller.

A thorough building inspection should assess:

Structural integrity — foundations, walls, roof framing
Roof condition — age, material, visible damage, guttering
Moisture and water damage — rising damp, leaks, drainage issues
Electrical and plumbing — age, safety compliance, hot water system
Pest activity — active termite infestations and historical damage

A pest inspection (separate to building in most cases) specifically checks for termite presence, entry points, and evidence of previous treatment. In high-risk areas — particularly coastal or heavily vegetated suburbs — this is non-negotiable.

Assess the Site Itself

Beyond the structure, evaluate the land:

Slope and drainage — does water pool near the foundation after rain?
Soil type — reactive clay soils require specific foundation design for any building work
Asbestos — homes built before 1987 may contain asbestos-containing materials in roofing, fencing, or internal linings
Contamination — if the property has a commercial or industrial history, or was a former service station site, soil contamination is a real risk. A Phase 1 environmental assessment may be warranted.

4. Market Due Diligence

Verify the Price Against Recent Sales

Agent appraisals and vendor expectations don't always reflect market reality. Before making an offer, pull recent comparable sales data:

Properties with similar land size, bedroom count, and condition within the same suburb
Sales within the last 3–6 months (longer periods are less relevant in a moving market)
Price-per-square-metre comparisons for land-heavy purchases

Look for both what sold and what passed in — auction results that show properties being passed in indicate vendor expectations may be above market.

Check Suburb Fundamentals

A property's long-term value is tied to its suburb's fundamentals:

Vacancy rates — for investment purchases, high vacancy rates signal oversupply
Rental yield trends — gross yield is a starting point, but net yield after costs is what matters
Infrastructure pipeline — planned transport, schools, or commercial development can lift demand; conversely, planned industrial development or road widening can suppress it
Demographic trends — population growth, household formation rates, and income profiles all shape long-term demand

An Intelliprop Suburb Report provides data-driven analysis on suburb fundamentals including demand indicators, comparable sales, and investment metrics — covering all suburbs across Australia.

5. Insurance and Risk Due Diligence

Check Insurability Before You Buy

Not all properties are straightforwardly insurable. Properties in:

Flood zones
High bushfire risk areas
Cyclone-prone regions
Areas with recent landslip or coastal erosion

...may attract significantly higher premiums or exclusions that limit coverage. Contact your insurer with the property's address before exchange to confirm you can get cover and at what cost.

Title Insurance

Title insurance protects against defects in the title that weren't identified during conveyancing — including fraud, unpermitted building work, and survey errors. It's a one-off premium, typically $500 – $1,500, and covers the life of ownership. Most conveyancers will offer this as an add-on; it's worth considering, particularly for older properties with complex title histories.

Using Technology in Your Due Diligence Process

AI-powered property reports can process data that would take days to manually compile — planning overlays, comparable sales, suburb metrics, flood and bushfire risk flags, and market positioning — in minutes.

An Intelliprop Property Report ($25) covers a single property across legal risk indicators, market value assessment, and suburb context. A Suburb Report ($49) provides deep suburb intelligence for investors or buyers comparing multiple locations.

These tools don't replace a conveyancer, building inspector, or mortgage broker. But they give you a factual foundation before you spend money on professional fees — and they surface issues you might not know to ask about.

Due Diligence Checklist — Summary

Legal
- [ ] Contract of Sale reviewed by conveyancer or solicitor
- [ ] Vendor statement / Section 32 reviewed
- [ ] Title search completed
- [ ] Easements, covenants, and encumbrances identified
- [ ] Planning and zoning checked
- [ ] All building permits and approvals verified

Financial
- [ ] Borrowing capacity confirmed at current rates
- [ ] Pre-approval valid and up to date
- [ ] Total purchase costs calculated (stamp duty, legal, inspection fees, LMI if applicable)
- [ ] Ongoing costs estimated (rates, body corporate, insurance, land tax)
- [ ] Strata report obtained (for apartments and townhouses)

Physical
- [ ] Independent building inspection completed
- [ ] Pest inspection completed
- [ ] Site drainage and slope assessed
- [ ] Asbestos risk considered (pre-1987 properties)

Market
- [ ] Comparable sales reviewed (last 3–6 months)
- [ ] Suburb vacancy rates and rental yield checked (investment properties)
- [ ] Infrastructure pipeline reviewed

Insurance and Risk
- [ ] Insurability confirmed with insurer
- [ ] Title insurance considered

The Bottom Line

Property due diligence is not optional — it's the difference between a good purchase and an expensive mistake. In a market where prices move quickly and information asymmetry favours sellers, the buyers who do the work are the ones who make better decisions.

Start with the data. Commission the professionals. Don't skip steps because you're excited about a property.

And if you want a single report that pulls together property risk, market positioning, and suburb fundamentals before you pay for inspections — an Intelliprop Property Report is the right place to start.