What is a Construction Contract?
A construction contract is a legally binding agreement between a homeowner and a builder that outlines the scope of the construction project, the timeline, and the payment terms. A construction contract is a legally binding agreement between a homeowner and a builder. It describes the scope of the construction project, how long it will take, and how the homeowner will pay for it. Before signing the contract, homeowners should carefully read the terms and conditions to ensure their investment is safe.
A construction contract typically includes the following key elements:
Scope of Work
A detailed description of the builder’s work, including the materials and labour required for the project.
Timeline
A schedule of when the work will be completed, including milestones and deadlines.
Payment Terms
A breakdown of the project’s total cost, including deposit amounts and payment schedules.
Dispute Resolution
A provision that outlines how disputes between the homeowner and the builder will be resolved.
Warranties
A section that covers any warranties or guarantees for the work performed.
Before signing a construction contract, it is essential for a homeowner to read through it carefully and make sure they understand all of the terms and conditions. Failing to do so can lead to misunderstandings, disputes, and potential legal issues. Homeowners can avoid costly mistakes and ensure their building project goes smoothly by carefully reading the contract and, if necessary, getting legal advice.
Types of Construction Contracts
A fixed price contract is a type of contract where the homeowner pays a set price for the entire project, regardless of any unexpected expenses that may arise.
The advantages of a fixed price contract include
- Certainty: The homeowner knows the exact cost of the project upfront
- Reduced risk: The builder assumes the risk of any cost overruns
- Incentive to stay on budget: The builder has an incentive to keep costs low to maximise their profit
Potential disadvantages to fixed price contracts, such as:
- Limited flexibility: Changes to the project can be difficult to make without increasing the overall cost.
- Potential for low-quality work: Builders may cut corners to keep costs low
Fixed-Price Contracts or Lump Sum Contracts
The Queensland Civil and Administrative Tribunal (QCAT) is the primary forum for building disputes in Brisbane. However, more serious disputes may be heard in the Supreme Court of Queensland.
Cost-Plus Contracts
A cost-plus contract is a type of contract where the homeowner pays the builder for the actual cost of the project plus a predetermined fee.
The advantages of a cost-plus contract include:
- Flexibility: Changes to the project can be made without significantly affecting the overall cost
- Transparency: The homeowner can see the actual cost of the project
Potential disadvantages to cost-plus contracts, such as:
- Uncertainty: The final cost of the project can be difficult to predict
- Incentive for higher costs: The builder has an incentive to increase costs to maximise their profit
As a construction contracts lawyer in Brisbane, we can provide contract advice on the best type of contract for your project, based on your unique circumstances and needs.
Related content: Types of Construction Contracts for Homeowners in Queensland
How to Choose the Right Contract for Your Project

Project Complexity
The complexity of your project can affect which type of contract is most appropriate. For example, a fixed price contract may be more suitable for a simple project, while a cost-plus contract may be more appropriate for a more complex project.

Budget
Your budget can also play a role in choosing the right type of contract. A fixed price contract may be better if you have a tight budget and want to avoid unexpected costs, while a cost-plus contract may be better if you have more flexibility in your budget.

Risk Tolerance
Your willingness to take on risk can also impact your choice of contract. A fixed price contract may be better if you have a low tolerance for risk, while a cost-plus contract may be better if you are comfortable with a certain level of uncertainty.
Working with a Qualified Builder and Construction Lawyer
Related content: Why You Need a Construction Contract Review
Common Mistakes to Avoid When Signing a Construction Contract
When it comes to signing a construction contract, homeowners in Brisbane should be aware of the common mistakes that can occur. By understanding these mistakes, homeowners can avoid potential issues and protect their investment. Here are some of the most common mistakes to avoid:
- Not Reading the Contract Carefully: One of the most common mistakes is not reading the contract thoroughly before signing it. This can lead to misunderstandings, unexpected costs, and other issues down the line.
- Not Seeking Legal Advice: Another mistake is not seeking legal advice before signing the contract. A construction lawyer can review the contract and identify any potential issues or areas of concern.
- Assuming Everything is Included: Homeowners may assume that everything is included in the contract, when in fact certain items may be considered optional or may require additional costs.
- Not Reviewing Payment Terms: Payment terms are a crucial aspect of the contract and can have a significant impact on the project. Homeowners should carefully review the payment terms and ensure that they are reasonable and fair.
To avoid these common mistakes, homeowners in Brisbane should take the following steps:
- Thoroughly review the contract before signing it, paying attention to details such as scope of work, timeline, and payment terms.
- Seek legal advice from a qualified construction lawyer to ensure that the contract is fair and reasonable.
- Confirm what is included in the contract, including any optional items or additional costs.
- Review the payment terms and ensure that they are reasonable and fair.

Expert Advice for Brisbane Homeowners
When it comes to signing a construction contract, it’s important for Brisbane homeowners to be informed and prepared. Homeowners can protect their investments and avoid common mistakes by understanding the key takeaways and seeking professional advice when needed. Here are some of the most important takeaways:
- Understand the different types of contracts and their advantages and disadvantages.
- Consider your project’s complexity, budget, and risk tolerance when choosing a contract.
- Thoroughly review the contract and seek legal advice if needed.
- Be aware of common mistakes, such as not reading the contract carefully and not reviewing payment terms.
- Work with a qualified builder and construction lawyer to protect your interests.
As a specialist construction lawyer in Brisbane, we encourage homeowners to seek professional advice and be proactive in protecting their investments. With the right knowledge and support, you can move forward with your construction project with confidence.

