Before buying commercial property in Australia, verify 15 areas: your investment purpose, title, lease, tenant, rent, outgoings, net yield, valuation, zoning, building condition, environmental risk, strata records, vacancy risk, finance and tax assumptions, and the contract. The key test is whether the documented income, legal use, physical condition and downside case support the price before you become unconditionally committed.
An office, retail or industrial listing with an attractive advertised yield can look convincing on paper. But what happens if the lease expires within 12 months, the outgoings are not recoverable from the tenant, or the building requires significant capital works the vendor has not disclosed? The yield you were shown is no longer the yield you will receive.
Commercial property due diligence is not simply about ticking documents off a list. It is about testing whether the income, legal right to use the asset, physical condition and realistic exit assumptions genuinely support the asking price and your investment strategy. Each finding should answer one of three questions: does this change the price, change the contract terms, or end the deal?
The checklist below is structured as a buyer-side decision sequence, designed to be used alongside a commercial solicitor, accountant, registered valuer, finance broker, and building or environmental specialist. Strategy-led property buying support from a commercial buyers agent can help you coordinate that process from brief through to settlement. This article is general information and does not replace independent legal, tax, financial, valuation, planning, building, environmental or SMSF advice.
Why commercial property due diligence matters before you buy
A commercial property acquisition combines three distinct interests: an income-producing lease, a physical asset, and a legal right to use that asset for a specific purpose. Each of these can carry risks that do not appear on a marketing brochure. The Australian Securities and Investments Commission's Moneysmart guidance on investment property ownership costs highlights that vacancy, rates, insurance, land tax, management, repairs, financing and entry or exit costs can all affect the actual return.
A headline yield quoted on a listing is a gross figure calculated from contracted rent before costs, vacancies or unrecoverable outgoings are applied. The three risk dimensions every buyer should assess are set out below.
| Risk dimension | What it tests | Why it changes the decision |
|---|---|---|
| Income and lease risk | Passing rent, market rent, lease security, outgoings recovery | Determines net operating income and supportable price |
| Legal and planning risk | Title, permitted use, zoning, encumbrances, contract conditions | Determines whether you can use, finance or resell the asset |
| Physical and environmental risk | Building condition, services, contamination, flood, climate exposure | Determines capital expenditure, insurance availability and remediation cost |
What should you check first before buying commercial property in Australia?
Spending on reports before confirming that an asset matches the investment strategy and finance position is a common mistake. Use this sequence:
- Define the portfolio purpose, target return profile and ownership structure.
- Confirm finance capacity and discuss lending terms with a commercial finance broker.
- Shortlist the asset and request all available documents from the vendor.
- Commission specialist reviews in order of decision impact: solicitor for title and contract, valuer for price support, building consultant for physical condition, accountant for tax and SMSF implications.
- Reconcile all findings against the strategy and price.
- Negotiate or withdraw based on documented evidence.
- Settle with all outstanding conditions resolved.
The 15-point commercial property due diligence checklist
Each check below identifies what to request, what to verify, and what decision the finding can change. Use it in the sequence provided rather than as a flat document list.
1. Confirm the property's investment purpose and buying criteria
Before reviewing a single document, define what the acquisition is actually meant to achieve. A property that does not fit the strategy should be rejected before deeper due diligence begins.
- Portfolio role: income, capital growth or owner-occupier use
- Intended hold period and liquidity requirements
- Asset class preference: office property, retail property or industrial property
- Target return profile and risk tolerance
- Ownership structure: individual, company, trust or SMSF
- Budget including acquisition costs, cash reserves and capital expenditure allowance
- SMSF buyers should confirm eligibility with an SMSF specialist before proceeding
Decision consequence: A mismatch between the asset and the strategy should end the process here, not at exchange.
2. Review the title, ownership and encumbrances
Title requirements vary across every state and territory. Obtain a current title search from the relevant land registry and have a commercial solicitor review all registered interests before proceeding.
- Current title and registered plan
- Easements, covenants, caveats and rights of way
- Registered mortgages and charges
- Access rights, drainage and parking reservations
- Development or heritage restrictions
- Any outstanding council rates, land tax or water charges that may survive settlement
Decision consequence: An encumbrance can affect permitted use, finance, access, redevelopment potential or resale value in ways that may not be recoverable through negotiation.
3. Analyse the commercial lease agreement
The lease is the income-producing component of the asset. Request and read the executed lease, every variation and any side agreement. A tenancy schedule or brochure summary is not a substitute.
| Lease term | Buyer consequence |
|---|---|
| Firm term versus options | Options are not exercised until the tenant elects to do so |
| Rent review mechanism | Fixed, CPI or market reviews affect income growth differently |
| Incentives and abatements | Reduce effective rent and should be quantified |
| Make-good obligations | Cost borne by tenant or owner depends on the specific clause |
| Permitted use | Restricts what the tenant can do and affects reletting flexibility |
| Assignment and subletting rights | Affects the buyer's ability to transfer the tenancy on sale |
| Default and termination provisions | Defines remedies and notice periods in arrears situations |
Decision consequence: A lease that appears long may contain unexercised options. An option is not committed income until it is exercised.
4. Assess tenant quality and lease security
Do not rely on an agent's description of a tenant as strong or reliable. Verify the income and covenant with documents.
- Rent ledger and arrears history
- Security deposits, bank guarantees or personal guarantees
- Concentration risk: is the income dependent on a single tenant?
- Remaining lease term relative to the hold period
- Tenant's trading history and business model viability where information is available
- Any subletting arrangements that dilute the direct covenant
Decision consequence: Concentrated income or a short remaining term may justify a lower price, stronger contract conditions or withdrawal.
5. Verify current rent, market rent and rental reviews
Passing rent, market rent and effective rent are three different figures. Treating them as equivalent is one of the most common financial errors in commercial property analysis.
| Income measure | Definition | Risk |
|---|---|---|
| Passing rent | Contracted rent currently paid | May be above or below market |
| Market rent | Rent a new tenant would pay today | The baseline for renewal or reletting |
| Effective rent | Passing rent after incentives are amortised | The true economic return |
Verify all rent reviews with the executed lease, rent ledger and comparable leasing evidence from a qualified leasing agent or valuer. Above-market passing rent creates a risk at the next market review. Review commercial property yield explained for guidance on how income measures affect net yield calculations.
Decision consequence: A market review downward can reduce net operating income and the supportable price materially.
6. Check outgoings and operating expenses
Not all outgoings are recoverable from the tenant. Verify the lease outgoings clause against actual cost records before assuming the property is net of costs.
| Outgoing type | Potentially recoverable | Often owner-borne |
|---|---|---|
| Council rates, water, land tax | Depends on lease type | Land tax: often owner-borne |
| Building insurance | Common in net leases | Varies by lease |
| Management fees | Uncommon | Usually owner-borne |
| Structural repairs and capital works | Excluded in most leases | Owner-borne |
| Strata levies | Depends on structure | Often partially owner-borne |
Review rates notices, insurance schedules, strata records, actual management statements and accountant input. The Moneysmart investment property guidance supports the need to account for management, insurance, repairs and other ownership costs when assessing returns.
Decision consequence: Unrecoverable costs reduce net operating income and change the price the income actually supports.
7. Calculate gross and net rental yield correctly
Gross yield is a useful starting point. Net yield is the figure that determines whether the asset is viable.
Gross yield = Annual passing rent divided by purchase price, expressed as a percentage.
Net yield = (Annual passing rent minus owner-borne outgoings minus vacancy allowance minus capital expenditure provision) divided by purchase price, expressed as a percentage.
Keep finance costs separate from the property-level operating yield so the asset and the financing structure can each be assessed on their own merits. A lower verified net yield from a durable lease may be more reliable than a higher headline gross yield from a short or above-market lease. For a detailed breakdown of income measures, see commercial property yield explained.
Decision consequence: An attractive gross yield can mask a poor net yield once unrecoverable outgoings, vacancy and capital expenditure are applied.
8. Validate the property valuation and purchase price
An asking price is not market value. Use a three-part framework to test whether the price is supported.
- Income approach: Apply a capitalisation rate to the verified net operating income. The Reserve Bank of Australia has noted that commercial property valuations are sensitive to future income expectations, expenses and interest-rate conditions.
- Comparable sales: Review settled transactions for comparable assets in the same market, asset class and lease profile.
- Property-specific adjustments: Apply discounts or premiums for building condition, lease quality, tenant covenant, location and capital expenditure requirements.
For methodology, the Australian Property Institute's valuation standards provide the recognised framework for registered valuers in Australia.
Decision consequence: A valuation gap may require a price renegotiation, a change to the finance structure or a decision not to proceed.
9. Investigate zoning, permitted use and planning controls
Current occupation does not confirm that a use is lawfully permitted. Verify through the relevant state or territory planning portal and local council records.
- Current zoning and permitted, consent-based and prohibited uses
- Development approvals for existing works and any unapproved structures
- Heritage overlays, flood overlays and other planning constraints
- Signage, parking and access requirements
- Proposed planning scheme amendments that may affect the asset
For NSW properties, the NSW Planning Portal shows how zoning controls permitted, consent-based and prohibited uses. Planning rules vary substantially across New South Wales, Victoria, Queensland, Western Australia, South Australia and other jurisdictions. Always verify for the actual property location.
Decision consequence: Industrial property with contamination history, retail property with restricted signage or office property in a zone that prohibits future conversion can affect exit options and reletting.
10. Inspect the building and essential services
Arrange independent inspections matched to the asset type. A strata office requires different scrutiny to a freestanding industrial warehouse.
- Roof, structure, facade, slab and drainage
- Electrical systems, mechanical services and air-conditioning
- Fire safety compliance and essential services records
- Lifts, loading facilities, parking and accessibility
- Asbestos register where relevant
- Fit-out ownership and make-good obligations
- Capital expenditure required in the next three to five years
Decision consequence: Deferred works or a significant capital expenditure requirement may justify a price reduction, contract protections or withdrawal. Do not assume building compliance without current specialist evidence.
11. Check environmental, contamination and flood risks
A desktop search is not an environmental clearance. It is a screening tool that identifies whether a specialist investigation is warranted.
- Historical uses of the site and surrounding land
- Industrial activity, fuel or chemical storage history
- Asbestos presence or likely use given building age
- Government flood mapping and council flood overlays
- Bushfire and climate-related exposure
- Any existing environmental reports or remediation orders
Decision consequence: Contamination can affect insurance availability, finance approval, permitted use, remediation liability and resale. Verify with an environmental consultant before proceeding unconditionally.
12. Review strata, owners corporation and shared facilities
This check applies where the asset is strata-titled or subject to shared facilities. Not every commercial property carries strata obligations.
- Current by-laws and permitted uses within the strata scheme
- Meeting minutes for the last two years
- Levy notices and sinking fund balance
- Outstanding special levies or planned capital works on common property
- Known defects and any current disputes
- Shared services, access obligations and common-area maintenance responsibilities
Decision consequence: Upcoming special levies or by-law restrictions on fit-out, signage or permitted use can change the net return or the ability to relet the premises on the buyer's preferred terms.
13. Assess vacancy, reletting and tenant demand risk
Test the downside case: who would lease or buy this asset if the current tenant leaves, at what rent, after what downtime, and at what incentive or capital cost?
| Scenario | Key questions |
|---|---|
| Lease expiry in under 24 months | What is the reletting evidence for this asset type and location? |
| Short or narrow tenant pool | How many alternative tenants could occupy this building as-is? |
| Above-market rent | What incentive would a new tenant require at market rent? |
| Make-good obligations | Who bears the cost and what is the realistic scope? |
For industrial property, access, loading and services capacity determine tenant depth. For retail property, trade area and permitted use define the alternative tenant pool. Office property requires scrutiny of incentive costs and services quality relative to competing supply.
Decision consequence: If the vacancy and reletting assumptions are unclear or unfavourable, the yield may not compensate for the risk.
14. Confirm finance, insurance and tax assumptions
Do not proceed on assumed lending terms, insurance availability or tax positions. Confirm each in writing with the relevant specialist.
- Written lending terms from the lender or finance broker, including loan-to-value ratios, interest costs and serviceability assessment for the specific entity and asset
- Insurance availability and coverage scope confirmed with an insurer or broker
- GST treatment: the ATO's guidance on GST and going concern and on SMSF business real property should be reviewed with an accountant or SMSF specialist
- Stamp duty, land tax and entity structure implications reviewed with an accountant for the specific jurisdiction
Decision consequence: A finance, tax or insurance assumption that does not hold can make the acquisition unaffordable, unsuitable for the intended structure or ineligible for SMSF use. Always take specialist advice.
15. Review the contract and settlement conditions
Have the contract reviewed by a commercial solicitor before any signing. Legal requirements, cooling-off rules, disclosure obligations and contract terms vary by jurisdiction.
Before exchange:
- Due diligence period, access rights and buyer's right to terminate
- Special conditions, inclusions, warranties and deposit exposure
- GST treatment and any going-concern election
- Lease assignment and tenant notification requirements
Before settlement:
- Settlement adjustments for rent, outgoings and rates
- Document handover requirements
- Cash reserve for settlement costs and initial capital expenditure
Decision consequence: Resolve or price material issues before exchange. After exchange, the buyer's negotiating position changes and specific jurisdictional rules will govern available remedies.
What should you do when due diligence finds a problem?
Not every issue ends a deal. Classify each finding before deciding how to respond.
| Finding type | Appropriate response |
|---|---|
| Quantifiable and priceable | Renegotiate the purchase price to reflect the verified cost |
| Contractually manageable | Negotiate a special condition, warranty or vendor obligation |
| Unresolved and unverifiable | Seek more evidence before proceeding or exchange |
| Uninsurable, unfinanceable or strategy-breaking | Walk away |
A short lease, above-market rent, deferred capital works or an unrecoverable outgoing may each justify a price adjustment. An unresolved environmental liability, an unpermitted use or a title defect may require legal resolution before the buyer can proceed safely.
Common commercial property due diligence mistakes to avoid
- Trusting the advertised yield. Gross yield figures on listings do not account for outgoings, vacancy or incentives.
- Reading only the tenancy schedule. The executed lease and all variations are the controlling documents.
- Counting options as firm term. Options are not income until the tenant formally exercises them.
- Assuming all outgoings are recoverable. Land tax, structural repairs and management fees are commonly owner-borne.
- Relying on current use for zoning. Occupation does not confirm lawful permitted use.
- Skipping specialist inspections. Building defects, asbestos and fire safety issues carry cost and liability consequences that are not visible without a qualified assessment.
- Ignoring reletting costs and downtime. The real income risk is often at the next lease expiry, not during the current term.
How Buyers Agency Australia fits into commercial property due diligence
Buyers Agency Australia provides buyer-side commercial property buying support for investors, business owners and SMSF trustees acquiring office, retail and industrial assets. The role is to help coordinate the acquisition process from brief through to settlement, not to replace the specialist advisers who provide legal, tax, valuation, planning, building and environmental opinions.
Dragan Dimovski, who brings more than 20 years of property experience to the buyer-side process, works with clients to define the acquisition brief, source assets, assess lease and income fundamentals, coordinate specialist reviews, negotiate on the buyer's behalf and manage the path to settlement.
The five-step buyer-side process:
- Define the brief: Investment purpose, asset class, return profile and ownership structure.
- Source the asset: On-market and off-market opportunities matched to the brief.
- Assess the asset: Lease, tenant, income, zoning, building and valuation analysis.
- Coordinate specialists: Solicitor, valuer, building consultant, accountant and finance broker.
- Negotiate and settle: Buyer-side negotiation through to settlement and document handover.
For investors ready to assess a specific asset, book a free strategy session to map out the acquisition approach with the team.
Buyers Agency Australia is discussed here because it provides buyer-side commercial property acquisition support. This article is general information and does not replace independent legal, tax, financial, valuation, planning, building, environmental or SMSF advice.
When a commercial property buyers agent is not the right fit
A commercial buyers agent adds the most value when a buyer needs sourcing, assessment, coordination or negotiation support for an unfamiliar asset or market. It may not be necessary when:
- The buyer has a clear acquisition brief and direct market knowledge of the specific asset class and location.
- A professional team including solicitor, valuer, accountant and building consultant is already in place and actively engaged.
- The buyer has sufficient time and capacity to coordinate the full due diligence process independently.
- The transaction is a renewal or acquisition within an existing portfolio the buyer manages directly.
The decision depends on where buyer-side support genuinely adds value for the specific acquisition.
Final checklist before making an unconditional offer
Before offer:
- Strategy and finance confirmed
- All lease documents and variations received
- Rent ledger and outgoings reconciliation reviewed
- Title search obtained and reviewed by solicitor
- Zoning and permitted use verified with the relevant planning authority
Before exchange:
- Building, pest and essential services inspections complete
- Valuation completed or comparable evidence reviewed
- Insurance availability confirmed with a broker
- Tax, GST, land tax and SMSF treatment confirmed with accountant and adviser
- Contract reviewed and special conditions agreed
Before settlement:
- Settlement adjustments reviewed
- Lease assignment and tenant notification complete
- Document handover confirmed
- Cash reserve for settlement costs and initial capital expenditure in place
Commercial property due diligence FAQs
1. What is commercial property due diligence?
It is the structured verification of legal, income, planning, physical, financial and transaction assumptions before a buyer becomes unconditionally committed to a commercial property purchase.
2. What should I check before buying commercial property in Australia?
Verify the investment purpose, title, commercial lease, tenant, passing rent against market rent, outgoings, net yield, valuation, zoning, building condition, environmental risk, strata records where applicable, vacancy assumptions, finance and tax position, and contract conditions.
3. What documents are needed for commercial property due diligence?
The executed lease and all variations, current title search, rent ledger, outgoings schedule, rates and insurance notices, planning certificate, building and essential services records, and the contract of sale reviewed by a commercial solicitor.
4. What should I check in a commercial lease before buying?
Confirm the firm term, unexercised options, rent review mechanism, incentives and abatements, make-good obligations, permitted use, assignment rights and any arrears or breaches. Do not rely on a tenancy schedule.
5. How do I verify commercial property rental income?
Compare the executed lease with the rent ledger, outgoings reconciliation and comparable leasing evidence. Distinguish passing rent, market rent and effective rent. Unverified incentives or above-market rent creates income risk at the next review.
6. Is a higher commercial property yield always better?
No. A higher gross yield can reflect above-market rent, a short lease, a weak tenant, unrecoverable outgoings or a difficult reletting market. Verified net yield from a durable lease is more meaningful than headline gross yield.
7. How do zoning and permitted use affect a commercial property purchase?
Current occupation does not confirm lawful permitted use. If the tenancy use is not permitted by the applicable zoning, future reletting or redevelopment may be constrained. Verify with the relevant state or territory planning portal and a town planner or solicitor.
8. How long does commercial property due diligence take?
Timing depends on document access, asset complexity, the number of specialist reports required and the due diligence period negotiated in the contract. There is no universal timeframe. Allow sufficient time to complete all specialist reviews before any conditional period expires.
9. Do I need a solicitor, valuer, accountant and building consultant?
Yes, for most commercial acquisitions you need all four. Each covers a different risk domain. A solicitor cannot substitute for a valuer's income analysis, and a building consultant cannot advise on tax treatment or lease enforceability.
10. Can I complete commercial property due diligence remotely?
Document review, title searches and financial analysis can often be conducted remotely. Physical inspections, building condition assessments and environmental investigations require qualified specialists on site. Remote buyers should not rely on video walkthroughs or agent photos as substitutes.
The decision after due diligence: proceed, renegotiate, condition or walk away
Commercial property due diligence is a decision-making process, not a document-collection exercise. A property should proceed unconditionally only when the verified income, legal use, physical condition and downside case all support the price and strategy. When risk is quantifiable, renegotiate the price or terms. When a finding can be managed by contract, seek specialist advice and add the protection. When a core assumption cannot be verified or accepted, walk away before exchange.
For investors working through a specific acquisition, book a free strategy session with the Buyers Agency Australia team to assess the asset, coordinate the right specialists and build a clear negotiation position. Or contact the Buyers Agency Australia team directly to discuss the commercial property buying support available for your next acquisition.
