Most first-time developers focus almost entirely on the purchase price. They spend weeks negotiating $10,000 off the asking price and then sign a contract with no due diligence clause, no planning condition, and a 30-day settlement that leaves them no time to validate the deal.
That's the wrong priority. The terms of your purchase contract are worth far more than the price. The right clauses give you time to confirm the deal stacks up before you're truly committed. The wrong terms, or missing terms, lock you into a deal you can't get out of when you discover something that changes the economics entirely.
This guide covers the key contract terms you need to understand when buying a site for subdivision. It's not legal advice. You should always engage a solicitor or conveyancer who understands development contracts. But you need to know what to ask for before your solicitor drafts the contract.
"I've seen people lose $50,000 because they didn't include a planning condition in their contract. I've also seen people walk away from deals cleanly, with their deposit returned in full, because they structured their terms properly from the start. The difference is knowledge, not luck."
Why contract terms matter more than price
When you're buying a site for subdivision, you don't yet know whether the deal will work. You've done your back-of-envelope feasibility and the numbers look good. But you haven't confirmed the detailed costs. You haven't spoken to a town planner. You haven't confirmed infrastructure charges with council. You haven't had a surveyor check the boundaries.
All of those things happen after you've signed the contract but before you settle. The contract terms are what give you the time and the legal right to do that investigation, and to walk away if the answers aren't what you expected.
Without the right terms, you're committed. Your deposit is at risk. And if you discover that council infrastructure charges are $40,000 higher than you assumed, or that there's an easement that makes the subdivision unworkable, you're stuck.
The due diligence period
The due diligence period is the single most important clause in any development contract. It gives you a defined window of time, typically 30 to 60 days, to investigate the site and confirm that the deal works before you're fully committed.
During this period, you can:
- Engage a town planner for preliminary advice on subdivision potential
- Confirm infrastructure charges and DA fees with council
- Commission a surveyor to check boundaries, easements, and contours
- Get preliminary quotes from a civil engineer
- Confirm service availability and connection costs
- Conduct soil testing if slope or fill is a concern
If anything comes back that fundamentally changes the deal's feasibility, you can terminate the contract during the due diligence period and get your deposit back. Without this clause, you have no such right.
I recommend asking for 45 to 60 days. That gives you enough time to get a planner's preliminary advice, confirm council charges, get a surveyor on site, and commission preliminary civil engineering advice if needed. Some vendors will push back and try to reduce this to 30 days. That's still workable if you move quickly and have your consultants lined up before the contract is signed. But 45 days is the comfortable minimum for a thorough investigation.
Subject clauses you should always include
Beyond the general due diligence period, there are specific conditions you should build into every subdivision contract. These are your contractual safety nets, and each one serves a distinct purpose.
Subject to due diligence satisfaction (30 to 60 days)
This is your master clause. It gives you 30 to 60 days to investigate the site thoroughly and confirm the deal works. During this period, you'll engage your town planner, confirm infrastructure charges with council, get a surveyor on site, and refine your feasibility with real numbers. If anything comes back that fundamentally changes the economics, you can terminate and get your deposit back. Without this clause, you have no contractual right to walk away.
Subject to Development Application (DA) approval
This is the big one. A subject-to-DA clause means you don't have to settle on the property until council has approved your subdivision application. If the DA is refused or the conditions imposed by council make the project unviable, you can terminate the contract. This is the most powerful protection you can have in a subdivision contract, because planning risk is the single biggest unknown at the point of purchase. In certain states, this period also allows you to begin marketing and running pre-sales while the DA is being assessed, which can significantly de-risk your project before settlement.
Access to site clauses for consultants
During the due diligence period, your consultants need to physically inspect the site. A surveyor needs to peg boundaries and take levels. A civil engineer may need to assess drainage and access. A geotechnical engineer may need to do soil testing. Your contract should include a clause granting you and your appointed consultants reasonable access to the property during due diligence. Without this, you're relying on the vendor's goodwill every time you need someone on site, which creates delays and uncertainty.
Marketing clauses
If your contract includes a subject-to-DA period, a marketing clause allows you to begin advertising and pre-selling the subdivided lots before you've settled on the property. This is a powerful tool for de-risking the deal. If you can secure pre-sales during the DA assessment period, you go into settlement knowing you have buyers lined up. It also strengthens your position with development finance lenders, who typically require a certain level of pre-sales before they'll fund the project. Not every vendor will agree to a marketing clause, but it's always worth asking for.
Want the complete deal structuring framework?
The Master Land Subdivision online course covers contract negotiation, consultant engagement, and the full process from offer to settlement.
Get the Online Course →Settlement terms and timing
Settlement is when you pay the balance of the purchase price and take ownership of the property. For a subdivision site, you almost always want a longer settlement period than the standard 30 to 42 days used in residential transactions.
Ideally, you're negotiating a settlement period of 6, 9, 12, or even 18 months. A long settlement keeps your capital free for longer, reduces your holding costs (because you're not paying rates, insurance, and loan interest on a property you haven't settled on yet), and gives you time to progress your DA, complete due diligence, and potentially secure pre-sales before you take on the financial commitment of ownership.
On larger or more complex projects, an 18-month settlement can mean the difference between settling with DA approval and pre-sales in hand (low risk) versus settling with nothing confirmed and hoping it all works out (high risk). The longer the settlement, the more of the project risk you can resolve before committing your capital.
Not every vendor will agree to extended settlements. Some need the money quickly and won't consider anything beyond 60 or 90 days. If the vendor won't budge, a 3-month settlement is still workable for simpler projects, but you'll need to move fast on your due diligence and DA preparation. The key is to ask. Many vendors, particularly those who aren't in a rush, will agree to a longer settlement if the rest of the offer terms are attractive (clean contract, reasonable price, minimal conditions beyond settlement timing).
Think about it this way. On a 3-month settlement, you settle and then start the DA process. You're paying holding costs from day one while council takes 6 to 9 months to assess your application. On a 12-month settlement, you lodge the DA during the contract period. By the time you settle, you may already have DA approval in hand. Same project, same site, but fundamentally different risk profiles. Always negotiate for time.
Structuring the deposit
The standard deposit in most Australian states is 10% of the purchase price. For a $600,000 site, that's $60,000 sitting in a trust account until settlement.
There are two ways to reduce your deposit exposure:
- Negotiate a lower deposit. Some vendors will accept 5% or even $10,000 as a token deposit, particularly if you're offering favourable terms elsewhere (higher price, faster settlement, fewer conditions). Every dollar you keep out of the deposit is a dollar that stays in your account earning interest or available for other costs.
- Use a deposit bond. A deposit bond is a guarantee (issued by a bank or insurance company) that acts as your deposit without you actually transferring cash. The vendor has the same security, but your capital stays liquid. Deposit bonds typically cost 1% to 1.5% of the deposit amount.
Common contract mistakes
No due diligence clause at all
This is the most dangerous mistake. Without a due diligence clause, you have no contractual right to terminate if you discover a problem with the site after signing. Your deposit is at risk from the moment you sign.
Due diligence period too short
Fourteen days is not enough. Even 21 days is tight. A town planner takes 5 to 10 business days to provide preliminary advice. Council can take a week to confirm infrastructure charges. A surveyor needs to be booked and scheduled. If your due diligence period is too short, you'll either rush decisions (dangerous) or run out of time and have to proceed without full information (also dangerous). Push for 45 to 60 days.
Not including a planning condition
The general due diligence clause gives you some protection, but a specific planning condition is stronger. It ties your right to terminate directly to the planning outcome, which is the core risk in any subdivision deal.
Signing the vendor's standard contract without amendments
The vendor's contract is drafted to protect the vendor. That's normal. Your solicitor should add special conditions that protect you. Never sign a standard residential contract for a development site without having your solicitor add the conditions outlined in this guide.
"The contract is your safety net. Get the terms right and you can investigate a deal thoroughly without risk. Get them wrong and you're locked in before you know whether the deal actually works."
What comes next
Contract terms are the "Secure" pillar of the three-pillar framework I teach at LandED: Find, Secure, Execute. Getting the contract right means you can proceed with due diligence confidently, knowing you have a clear exit if the numbers don't hold up under scrutiny.
If you're still at the "Find" stage, start with our guide on How to Find Subdivision Sites Using Free Online Tools.
If you've found a site and want to confirm the numbers before making an offer, read Back-of-Envelope Feasibility and The 30% Margin Rule.
If you want the complete deal structuring framework including contract templates, consultant engagement scripts, and the full process from offer to settlement, the Master Land Subdivision online course covers it in detail.
