Due Diligence Before You Buy a Property: The Complete Checklist

Due diligence is the work you do to confirm that a property is what it appears to be, that you can use it the way you intend and that the price reflects the facts. It happens in the window before you commit, or during a cooling-off or conditional period where one applies. Done well, it turns a large purchase from a leap of faith into a series of checked boxes.

The process spans legal, physical, regulatory and financial questions. Each strand reduces a different kind of risk. This checklist sets out what to verify, who usually does it and why it matters, grouped by theme so you can work through it in order.

A note before you start: rules, taxes and disclosure obligations differ by state and territory, and some steps are triggered at different points in the contract process depending on where you buy. Treat the items marked [Verify] as prompts to confirm the local detail with your conveyancer or solicitor.

Legal And Title Due Diligence

The legal layer establishes what you are actually buying and on what terms. This is the part most buyers underestimate, and the part where a professional review pays for itself.

Review The Contract Of Sale

Have your conveyancer or solicitor review the contract before you sign or, where the contract is signed first, during any cooling-off or review period. They check the parties, the price, the deposit, the settlement timeframe, the inclusions and exclusions and any special conditions that shift risk onto you.

Read the vendor disclosure material as well. Most jurisdictions require the vendor to attach a disclosure statement or prescribed documents, and the obligations and the buyer's remedies for an inaccurate statement vary by state [Verify]. Flag anything you do not understand rather than assuming it is standard.

Order A Title Search

A title search confirms who legally owns the property and what is recorded against it. Your conveyancer obtains the certificate of title and the dealings noted on it from the state land registry.

Read the title for these items:

• Ownership: the registered proprietor must match the seller named in the contract
• Easements: rights for others to cross or use part of the land, such as drainage, access or services
• Covenants: restrictions on how the land can be used or built on, often limiting materials, height or subdivision
• Caveats: a claim or interest lodged by a third party that can block dealings until resolved
• Encumbrances and mortgages: charges that must be discharged at or before settlement

An easement or covenant can sit quietly on a title for years and then frustrate a renovation or extension. Confirm that nothing on the title conflicts with your plans before you commit.

Planning, Zoning And Building Approval

This theme answers a simple question with large consequences: can the property be used and changed the way you intend, and has past work been done legally.

Check Zoning And Planning Controls

Obtain a planning certificate from the local council or the relevant state planning authority [Verify]. It records the zone that applies to the land and the controls that come with it.

Work through these planning points:

• Current zone: residential, mixed use, commercial, rural or another category, and what that permits
• Overlays: heritage, environmental, flooding, bushfire or character overlays that add restrictions
• Future development: proposed rezoning, nearby major projects or precinct plans that could change the area
• Road widening and resumption: any reservation that could take part of the land for a future road or public work

If you plan to extend, subdivide or run a business from the property, confirm the controls allow it before you sign. Planning rules also shape what your neighbours can build, which affects views, light and noise.

Confirm Building Approvals And Certificates

Unapproved building work is a common and expensive surprise. Decks, carports, sheds, pergolas, bathrooms and granny flats are frequent offenders.

Ask your conveyancer to confirm that structures match the approvals held by council, and that the required certificates exist:

• Approved plans and permits for any additions or alterations
• Final occupancy or completion certificates where required [Verify]
• Compliance certificates for pools, fences, plumbing and electrical work where applicable [Verify]
• For newer builds, any home warranty or builder's insurance that should pass to you [Verify]

Unapproved work can mean rectification orders, demolition, insurance gaps or a discount you should be negotiating now rather than discovering later.

Physical Condition Of The Property

A property can have clean title and full approvals and still cost you tens of thousands in repairs. The physical inspections cover the building itself and the land it sits on.

Building And Pest Inspection

Engage a qualified, insured inspector for a building inspection and a separate or combined pest inspection. The building report covers structural integrity, roofing, walls, moisture, drainage and the general state of the dwelling. The pest report covers termites, borers and other timber pests, plus conditions that attract them.

Read the report for major defects, safety hazards and signs of ongoing problems rather than cosmetic wear. A significant finding gives you grounds to renegotiate, request rectification or walk away where the contract allows.

Survey And Boundaries

A survey confirms that fences, walls and buildings sit where the title says they do. Encroachments work in both directions: a neighbour's structure over your boundary, or your structure over theirs.

Consider an identification survey where boundaries look uncertain, where you plan to build close to a fence or where the title dimensions and the physical site appear to disagree. Resolving a boundary question before settlement is far simpler than after.

Utilities And Connections

Confirm that the essential services are connected and adequate:

• Water and sewer, or a septic or treatment system in unsewered areas
• Electricity, and gas where relevant
• Telecommunications and internet, including the connection type available at the address
• Stormwater drainage and its discharge point

In rural and semi-rural areas, check water security in particular: tank capacity, bore licences, dam rights and reliable access. A service that is assumed and not confirmed can become a costly connection later.

Environmental And Site Risk

Some risks attach to the location rather than the building. They affect insurance, usability and long-term value.

Flood, Bushfire And Contamination

Check the property against the relevant hazard mapping and council records [Verify]:

• Flood risk: flood mapping, overland flow paths and any history of inundation
• Bushfire risk: bushfire-prone area mapping and any construction or vegetation requirements that follow
• Contamination: past industrial, agricultural or fuel-storage use that may have left the land contaminated [Verify]

These factors influence whether you can insure the property affordably, whether you can build or extend and what conditions apply if you do. A contaminated-land listing or a high bushfire rating should be understood before, not after, you exchange.

Strata And Body Corporate (Apartments And Townhouses)

If you are buying an apartment, townhouse or other strata-titled property, you are buying into a shared scheme as well as a unit. The scheme's records tell you how well it is run and what liabilities you are joining.

Inspect The Strata Or Body Corporate Records

Order a strata or body corporate records inspection, or a strata report prepared from those records. Terminology and the exact documents differ by state [Verify], but you are looking for the same substance.

Review these items:

• The financial position: the administrative fund and the sinking or capital works fund, and whether they are adequately funded
• Levies: current quarterly levies and any special levies raised or foreshadowed
• Minutes and correspondence: disputes, defects, building issues and major works under discussion
• Insurance: that the building is properly insured and the policy is current
• By-laws: rules on pets, renovations, short-term letting and use of common property
• Major works: outstanding or planned repairs, including any building defect rectification

A scheme with thin reserves and looming repairs can hit you with a special levy soon after you move in. The records show you the difference between a well-managed building and one that will demand money and attention.

Financial And Holding Costs

Beyond the purchase price, a property carries ongoing costs and one-off charges at settlement. Confirm them so your budget reflects reality.

Rates, Water And Land Tax

Ask for the current figures and check how they are adjusted at settlement:

• Council rates: the annual amount and how it is apportioned between you and the vendor
• Water rates and usage charges, and any allowance at settlement
• Land tax: whether the property carries a land tax liability, which depends on the land value, your total holdings and the state's thresholds and rules [Verify]
• Owners corporation or strata levies, where the property is strata titled

Land tax in particular catches investors out, because it depends on your aggregate landholdings in that state, not the single property in isolation [Verify]. Model the holding costs before you commit, not after.

Finance, Valuation And Insurance

Confirm your finance is in place on terms you can meet. Where your contract is subject to finance, work to the deadline and keep your conveyancer informed [Verify].

• Finance approval: confirm the lender's formal approval, not just a pre-approval, against this specific property
• Bank valuation: a low valuation can create a shortfall you must fund from your own pocket; understand the result before you rely on the loan
• Insurance: arrange building insurance to take effect from the contract date or settlement, depending on when risk passes under your contract [Verify]
• Lenders mortgage insurance: factor it in where your deposit is below the lender's threshold

Insurance timing matters. In some contracts risk passes to the buyer before settlement, so confirm the point at which you must be insured rather than assuming it is the settlement date [Verify].

Market And Investment Checks

The final theme tests the price and, for investors, the income. This is where comparable evidence replaces the asking price as your reference point.

Comparable Sales And The Neighbourhood

Assess the price against recent comparable sales rather than the listing price or the agent's guide. Look for properties of similar size, condition and location sold in the recent past, and adjust for the differences.

Spend time on the neighbourhood as well: transport, schools, amenity, noise, traffic and any planned changes nearby. Visit at different times of day and on different days. The lived experience of a street rarely matches a single afternoon inspection.

Rental Appraisal And Existing Lease (Investors)

If you are buying as an investment, obtain an independent rental appraisal so your yield is based on evidence rather than the vendor's estimate. Confirm the realistic weekly rent, the vacancy pattern in the area and the likely demand for the property type.

Where the property is sold with a tenant in place, review the existing lease and tenancy records carefully:

• The current rent, the term and any options
• The bond lodgement and condition reports
• Arrears, disputes or breaches on record
• Whether the lease and the rent suit your plans, since you generally inherit the tenancy on the existing terms [Verify]

A below-market rent locked in for a long term, or a problem tenancy, changes the value of the investment regardless of the headline price.

How A Buyers Agent Coordinates Due Diligence

Due diligence involves several professionals working to a deadline, and the buyer is usually the one chasing them. A buyers agent runs that process on your behalf.

In practice, the buyers agent identifies which checks the property needs, briefs and books the inspectors, coordinates with your conveyancer or solicitor on the contract and the searches and gathers the comparable evidence to test the price. They read the reports with a trained eye, separate the material findings from the cosmetic ones and translate them into a negotiating position or a reason to walk away.

Because a buyers agent works only for the buyer, the analysis is aligned with your interests rather than the sale. They keep the strands moving in parallel so the work fits inside the contract timeframe, and they flag the issues that warrant a price adjustment, a special condition or a harder conversation before you are committed.

Working Through The Checklist

Due diligence is not a single task but a sequence, and the order matters: confirm the legal and planning position early, because a title restriction or a zoning problem can make the physical inspections moot. Build the physical, environmental and financial checks around that, then test the price against the market last.

No two properties need exactly the same checks. A new apartment leans heavily on strata records and defect history, a rural block on water, access and contamination, an older house on structure, pests and unapproved work. Match the depth of the work to what is actually at stake.

If you would like a buyers agent to coordinate due diligence on a property you are considering, AgentBridge can connect you with an independent professional who works for buyers across Australia.

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This article is general information only and does not take account of your personal circumstances. It is not financial, tax or legal advice. Due diligence requirements, taxes and disclosure obligations vary by state and territory and change over time. Confirm the position for your situation with your own conveyancer, solicitor, accountant or licensed adviser before you act.