Off-the-plan contracts: What every buyer needs to know

Because signing with confidence starts with understanding what you’re signing.

For many buyers, the contract can be the most daunting part of buying a new home.

Off-the-plan contracts can be longer than a contract for an established home. More detailed. And filled with terms that aren’t always part of everyday language.

But here’s the good news: you don’t need to understand every legal clause line-by-line to feel confident. You just need to know what matters, what to look for, and when to ask questions.

This guide breaks it down in plain English - so you can move forward feeling informed, not overwhelmed.

First things first: What is an off-the-plan contract?

An off-the-plan contract is a legal agreement to purchase a property before it’s built (or before it’s completed).

It sets out:

• The agreed purchase price
• What’s included in the home
• Estimated timelines for construction and settlement
• The rights and responsibilities of both you and the developer

Because the home doesn’t physically exist yet, the contract is naturally more detailed than a standard purchase agreement. That’s because it’s designed to cover the “what ifs”.

The big picture: What you’re agreeing to

At its core, you’re agreeing to:

• Buy the completed property once construction is finished
• Pay a deposit upfront (usually 5-10%)
• Pay the remaining balance at settlement

In return, the developer agrees to:

• Build the property in line with the plans and specifications
• Complete the development within a reasonable timeframe
• Deliver the home as outlined in the contract

It’s a mutual commitment- just with a longer timeline than most property purchases.

The timeline (and why it’s different)

Unlike established homes, where settlement happens more quickly, off-the-plan contracts come with a longer lead time.

This means:

• You sign now
• The property is built over months-years
• Settlement happens at completion

That time can be a real advantage - giving you space to prepare financially - but it’s important to understand how timing is handled in the contract.

The sunset clause (and what it means for you)

You’ll almost always see something called a sunset clause.

In simple terms, this is the date by which the development must be completed.

If that date isn’t met, the contract may allow either party to withdraw.

It’s there as a safeguard - but it’s worth understanding:

• How long the sunset period is
• Whether extensions are allowed
• What rights both you and the developer have

This is one of the key areas where your solicitor or conveyancer will guide you, so draw on their expertise and ask as many questions as you need to.

Plans, inclusions & ‘what you’ll actually get’

Because you’re buying something that isn’t built yet, the contract relies heavily on documentation.

This includes:

• Floorplans
• Finishes and fixtures (inclusions schedule)
• Materials and specifications

One of the most important things to understand is that the finished product must be substantially in line with these documents - but small changes can sometimes occur.

For example:

• A similar (but not identical) material may be used
• Appliance brands may be substituted with equivalent options
• Minor layout adjustments may happen due to construction requirements

If something is particularly important to you - like the finishes and appliances - make sure it’s clearly documented.

The deposit (and where it goes)

Your deposit is typically:

• 5-10% of the purchase price
• Held in a trust account until settlement

This means:

• It’s not immediately released to the developer
• It’s protected as part of the transaction

As a purchaser, you’re always welcome to confirm where your deposit is held and under what conditions it can be accessed.

Finance: What you need to plan for

Most off-the-plan contracts are not subject to finance in the same way established purchases often are.

This means:

• You’ll need to ensure you can secure finance by settlement, not just at signing
• Your financial position should remain stable during the build period
• Over the construction period, lenders will reassess:
• Your income
• Your expenses
• The property’s value

It’s a good idea to stay in touch with your broker throughout the build - not just at the start - so you can keep track of any changes to your borrowing capacity, interest rates or lending policies, and avoid surprises when it’s time to settle.

Defects & your rights after completion

Once your property is finished, you’ll usually have:

• A pre-settlement inspection to check everything is as expected
• A defects liability period, where the developer addresses any issues

This might include things like:

• Paint touch-ups
• Minor fixes
• Adjustments to fittings or finishes

It’s normal for new builds to have small items to fix, so don’t panic - what matters is having a clear process to resolve them.

Why legal advice isn’t optional - it’s essential

This is the one part you don’t want to DIY!

A solicitor or conveyancer will:

• Review the contract in detail
• Explain any risks or unusual clauses
• Negotiate amendments where needed
• Make sure your interests are protected

Think of them as your translator and safety net rolled into one.

So… should you be worried about the contract?

Not at all - but you should be informed.

Off-the-plan contracts are designed to account for time, construction, and uncertainty. That’s why they’re more detailed.

But once you understand the timeline, the key clauses and your rights and responsibilities, it becomes much less intimidating and much more empowering.

Final thought

The contract isn’t there to catch you out. It’s there to set clear expectations - for both you and the developer.

And when you take the time to understand it (with the right support around you), it becomes something powerful: a roadmap.

One that takes you from a set of plans… to a home you can actually walk into.

For more off-the-plan buying guides, click here.