Buying a commercial property as a tenant is not the same as buying a home or even an office you will fully occupy yourself. When you are both the buyer and the tenant, your risk is tied to the lease, the fit-out, the make-good clause and how outgoings work in real life, not just on paper. Getting commercial property due diligence in Brisbane right means checking the building, the lease and the way the property will run day-to-day.
I’m Paul, and I look at these properties from a tenant-buyer’s side of the table. My job is to translate what I see on site and in the documents into clear risk decisions: can you live with this building and this lease, on these terms, for the way you actually run your business?
Around September, a lot of Brisbane businesses start planning pre-Christmas moves, renewals and relocations. That often means rushed contracts, short due diligence periods and pressure from agents. I regularly see first-time commercial buyers inherit hidden maintenance problems, non-compliant fit-outs and outgoings that don’t match their expectations of a “net” rent.
When I’m brought in early enough, my role is to slow that process down just enough so you can still move quickly, but with your eyes open. I’m not there to blow the deal up for the sake of it; I’m there to make the risk visible so you know when to proceed, when to renegotiate and when to walk.
What Tenant-Focused Due Diligence Really Covers
A standard building inspection is only one slice of the picture. It tells you about condition at a point in time. Pre-purchase due diligence is wider: it pulls together building condition, compliance and how the lease pushes risk between owner and tenant. A tenancy review looks at the lease, options, rent reviews and make-good. You need all three worked through together, or you end up making decisions in the dark.
From a practitioner’s point of view, here’s how I break it down for Brisbane tenant-buyers:
- Structure and external shell: roof coverings and flashings, external walls, slab edges, obvious movement or cracking that could affect serviceability or waterproofing.
- Services: power, plumbing, air conditioning and ventilation where reasonably accessible, with a focus on age, visible condition and likely remaining life, not just whether it worked on the day.
- Fire safety systems and obvious compliance gaps: exits, signage, alarms/smoke detection, extinguishers, hose reels where present, and any visible red flags against Queensland fire safety expectations.
- Asbestos risk: based on age, visible materials and any asbestos register or survey you already have. If the era or materials worry me, I’ll recommend an asbestos assessor.
- Access and egress: exits, stairs, paths and general movement, looking at how your staff and customers will actually use the space, not just the bare minimum on a plan.
- Timber pest risk and moisture: slab edges, garden beds hard up against walls, drainage, gutters, downpipes and internal signs of past moisture.
- Tenant-specific issues: fit-out approvals, any obvious unapproved works, and how make-good clauses could interact with what’s currently built.
I use AS 4349.1 as a reference for how a visual inspection is approached. It sets out the general methodology and limitations for pre-purchase building inspections in Australia. For commercial sites, I adapt that method to suit the building type, size and agreed scope. I also keep the National Construction Code (NCC) and Building Code of Australia (BCA) in mind, as well as local council expectations in South East Queensland, plus any triggers that might involve the building regulator or require future upgrade work.
I’m always upfront about limitations: this is a visual inspection, not destructive testing or full services commissioning. When the risk or complexity is high, I’ll recommend specialist reports (for example, detailed fire, electrical, structural, asbestos, or mechanical assessments) so you understand where my role stops and a specialist needs to step in.
Lease Risk, Make-Good and Hidden Cost Traps
The same defect can be a nuisance in one deal and a deal-breaker in another, purely because of how the lease is written. That’s where I see a lot of buyer anxiety, the fear that you’re signing up for a flood of costs you can’t see yet.
From what I see on the ground, key traps include:
- Full-repair leases: On a full-repair lease, an old roof or tired carpark can turn into your long-term bill. If I see end-of-life roofing or fatigue in external areas under this lease type, I’ll flag it as a high financial risk, not just a maintenance note.
- “As-is where-is” deals: Under an as-is arrangement, you might be taking responsibility for every current problem from day one. Here, undocumented or marginal compliance issues matter more, because you’re buying the existing condition, warts and all.
- Gross versus net leases: A gross lease can look simple but hide built-in contributions to capital works. Net leases advertise a low face rent, but outgoings can blow your budget if there’s a backlog of major works. I routinely compare the likely capital works profile (roof, AC, paint, carparks) to your outgoings assumptions.
- CPI versus market rent reviews: If the building needs major upgrades, a future market review may be tough if the property is under-performing compared to similar, more modern stock.
Make-good obligations are another common trap. If your fit-out is not approved or does not meet current codes, you might be forced to strip it out or bring it up to scratch at your own cost later.
Common real-world examples I come across:
- Partitions and walls added without clear approvals or certification.
- Extra plumbing for kitchens, clinics or hair basins with no traceable records.
- AC units moved or added with poor mounting, drainage, or electrical work.
- Mezzanine storage that looks simple but might trigger structural or fire questions if judged as a floor rather than “old shelving”.
When I see these, I don’t just list them. I talk you and your solicitor through how they might interact with your make-good clause and future leasing plans. Sometimes the best move is to formalise and certify the works; other times it’s safer to remove or redesign them.
Outgoings are where physical condition meets your budget. When I inspect, I’m thinking about what the roof, external paint, carparks, AC systems and common services might mean for future sinking funds or capital works. I want your expected outgoings schedule to line up with what the building actually needs over the next 3, 10 years, not just year one.
Step-by-Step Due Diligence Process for Brisbane Tenants
Here’s how I normally structure the process with tenant-buyers in Brisbane. This is the practical, step-by-step version so you know exactly what happens and when.
Step 1: Clarify Your Use and Risk Tolerance
Before you even make an offer, I ask you to be clear on:
- How long you plan to stay (3, 5, 10+ years).
- How the space will be used and by how many people.
- Whether you expect to grow, add staff, or change the use.
- What level of disruption and capital expenditure you can handle.
- Which findings would be instant walk-away issues for you (e.g., asbestos in certain areas, major roof replacement in first 2 years, non-compliant fire systems that can’t be economically upgraded).
Your solicitor, accountant and broker can then shape the contract and finance around your risk profile, not just the price. When I know your risk line, I can prioritise findings and tell you which ones matter most to you, not to some generic buyer.
Step 2: Contract and Due Diligence Clause
Next comes the contract and due diligence clause. In Brisbane, you need enough time to:
- Inspect the property.
- Receive and digest the report.
- Get quotes for major items if needed.
- Discuss the position with your solicitor, accountant and lender.
- Negotiate amendments or decide to proceed or terminate.
Very short timeframes can leave you with unanswered questions or force you into quick decisions you’re not comfortable with. When I see a clause that’s too tight for the asset’s complexity, I’ll say so bluntly.
Step 3: Site Inspection
On site, I walk the property with an eye on structure, services, fire, access and pest risk. Typical sequence:
- External overview: roof form, site falls, drainage, vehicle movement, obvious structural or moisture risks.
- Internal areas: ceilings, walls, floors, wet areas, fit-out quality and any signs of leaks or movement.
- Services and plant: AC units, switchboards (visually), plumbing terminations, hot water, accessible plant spaces.
- Fire and life safety: exits, signage, extinguishers, alarm panels where accessible, emergency lighting where visible.
- Pest and moisture: slab edges, gardens, retaining walls, moisture staining, accessible roof spaces where safe.
I take photos, note limitations and think about upcoming weather patterns like heavy rain and storms that often hit after spring. A roof that looks “ok” on a dry day might be a real issue once the wet season kicks in, so I assess vulnerability, not just visible leaks.
Step 4: Reporting and De-Mystifying the Findings
After the inspection, the report should not sit in your inbox as a stress trigger.
My process is:
- Deliver a structured written report with photos and plain-language summaries.
- Highlight “red flag” issues up front: safety, compliance, structural, and forecast high-cost items.
- Provide a hierarchy of issues:
Immediate safety or compliance concerns.
Near-term capital items (0, 3 years).
Medium-term risk and “nice to address” items.
- Hold a call (or meeting) to walk through the report point by point.
- Answer your and your advisor team’s questions so there are no technical surprises left.
My aim is clear choices, not technical confusion. If something is uncertain, for example, whether a structural crack is cosmetic or serious, I’ll tell you it’s uncertain and recommend how to resolve it (e.g., structural engineer report) rather than pretending it’s nothing.
From Report to Negotiation: Next Steps After Serious Issues Found
Technical findings only have value if they change how you handle the deal. Once serious issues are identified, here’s the typical practical sequence I recommend:
- List critical issues: Pull out structural, safety, compliance and high-dollar items from the report.
- Get targeted quotes: For major items (roofing, fire system upgrades, electrical switchboard work, asbestos removal), obtain at least one indicative quote, sometimes two when the sums are large.
- Quantify timing: Decide whether works must be done immediately, staged, or deferred.
- Meet with your team: Discuss with your solicitor, accountant and lender how these costs impact your numbers and risk profile.
- Choose your negotiation strategy:
Price adjustment to reflect known defects.
Seller works before settlement, with clear scope and completion standards.
Rent-free or landlord contribution periods for upgrades.
Longer due diligence windows to allow further specialist investigations.
Contract or lease variations that shift specific risks back to the owner.
- Decide whether to proceed: Sometimes it is right to walk away. Other times, a problem is manageable with a clear plan, realistic costings and the right clauses.
When the anxiety is “Are we buying a lemon?” my role is to put numbers and timeframes around the problems so you can see whether this is a controlled risk or a bottomless pit.
Fire Safety, Compliance and Regulatory Context
Fire safety checks focus on how the current setup lines up with Queensland rules: exits, warning systems, extinguishers, signage and maintenance records where available. I look at this in the context of:
- The NCC/BCA fire provisions for the relevant building class.
- Queensland Development Code and local fire authority expectations.
- Whether the current occupation and your proposed use match.
Non-compliance can push extra obligations onto you as a tenant-owner, especially if you change the use or bring in more staff or customers. Early identification lets your team budget and negotiate for required upgrades, rather than discovering them after settlement when you lodge approvals.
Accessibility is also tied to building class and use. If you’re planning more public access, you may trigger requirements for paths, amenities or carparks that are different to the current use. I flag obvious shortfalls so your designer, certifier or access consultant can confirm what will be mandatory if you proceed.
I also look for obvious unapproved works and fit-outs that might cause trouble with insurance or future leasing if council expects them to be regularised.
Pest, Moisture and Brisbane-Specific Risks
Brisbane is friendly to timber pests. I pay close attention to:
- Slab edges and concealed areas along external walls.
- Garden beds built up against walls and posts.
- Older tilt-panel joints and brick structures with past moisture signs.
- Drainage, gutters, downpipes and site fall, with the storm season in mind.
Termite damage can be a simple maintenance issue if localised and stable, or a structural and insurability concern if widespread. The key is to fold pest findings into the broader due diligence, not treat them as an afterthought. When I see anything beyond very minor history, I explain what level of further invasive or specialist investigation is sensible before you commit.
Working with Agents: Professional-to-Professional
When I’m dealing with selling and leasing agents, I’m conscious of campaign timelines and access constraints. My approach is:
- Clear communication about inspection scope, timing and access needs.
- Coordinated site visits that minimise disruption to the vendor and existing tenants.
- Direct, factual feedback on practical issues, without emotional language.
For agents, an informed buyer is usually a smoother transaction. I’m transparent that my inspection is visual and limited by access, in line with AS 4349.1 principles, and I’m available to answer reasonable follow-up questions so you aren’t left fielding technical queries without support.
What My Work Does, and Doesn’t, Guarantee
Guarantees cause a lot of confusion, so I keep this simple.
What my inspection and report do provide:
- A thorough visual assessment on the inspection day, using AS 4349.1-style methods adapted for commercial properties.
- Professional opinions on condition, risk and likely implications for cost and compliance.
- Clear recommendations for further specialist investigation where the risk or uncertainty is higher than a visual inspection can resolve.
What they don’t guarantee:
- They are not a warranty that no defects exist, especially concealed or future defects.
- They are not a compliance certificate under the NCC/BCA or fire/building laws.
- They are not a replacement for specialist reports (structural, electrical, fire, asbestos, mechanical) when those are indicated.
If issues emerge later that were reasonably visible at the time but not reported, we review the file and photos and address it under our professional indemnity framework. If entirely new issues arise (for example, storm damage a year later), they sit outside the original inspection, but you can always come back to me for a follow-up review.
Putting It All Together for Your Next Brisbane Commercial Purchase
For your next Brisbane commercial purchase as a tenant-buyer, the practical path is:
- Think early about how you’ll use the property and what risks you cannot accept.
- Share draft documents with your professional team, solicitor, accountant, broker and, if needed, planner or certifier.
- Set a realistic due diligence period that allows for inspection, reporting, quoting and negotiation.
- Match the level of inspection to the asset type, age and price point, and be prepared to add specialists where the risk justifies it.
- Use the report as a negotiation and planning tool, not a yes/no verdict. Focus on how defects, lease terms and outgoings interact.
A tenant-focused, practitioner-led approach helps you make clear decisions, protect your business and reduce unwelcome surprises long after settlement. My role is to give you that clarity, grounded in standards like AS 4349.1 and the NCC/BCA, and tailored to how you actually run your operation in Brisbane’s real conditions.
Protect Your Investment With Expert Due Diligence
If you are planning a purchase or lease, we can help you navigate the complexities of commercial property due diligence in Brisbane so you are not caught out by hidden issues. At Paul Klumper from Building & Pest Bne, we provide clear, practical reports that support confident decisions and stronger negotiations. Reach out today and let us walk you through the process step by step, or contact us to book your inspection.