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Home Extension and Renovation Costs: Understanding the Basics

Renovating or extending your home can be a great way to increase its value, functionality, and overall appeal. However, it can also be a significant financial investment. To make sure your renovation or extension project stays within your budget, it's important to have a clear understanding of the costs involved and how to manage them effectively.

How Much Does an Extension and Renovation Cost in Adelaide?

The average cost of a home renovation in Adelaide is $40,000 to $60,000, with most homeowners spending between $10,000 and $150,000. This includes both minor and major renovations, so the cost of an extension and renovation project is likely to be higher. The average cost of an extension in Adelaide at around $1,350 to $2,100 per square metre, depending on the quality of materials and finishes. This means that a 50 square metre extension could cost between $67,500 and $105,000.

In this guide, we'll discuss the various factors that can affect the cost of your project, including the size and scope of the project, materials and labor costs, and any unexpected expenses. We'll also provide tips and strategies for managing your expenses, such as setting a realistic budget, choosing quality materials within your budget, and implementing cost-effective strategies to save money.

Whether you're planning a small renovation or a large extension, this guide will provide you with the information and tools you need to manage your expenses and achieve your dream home without breaking the bank.

A Pro Tip

As a construction company in Adelaide, we understand the importance of managing renovation and extension costs. One pro tip we would like to offer is to work with a professional contractor or builder who has experience in managing budgets and delivering projects on time and within budget.

A professional contractor or builder can provide valuable insights and guidance on managing your expenses, such as recommending cost-effective materials and design options, providing accurate quotes and timelines, and being transparent about any unexpected costs that may arise.

Templeton built

A Construction Company in Adelaide

Factors that Affect Extension and Renovation Costs 

Several factors can influence the cost of an extension or renovation project, including:

A. Size and Complexity of the Project

The larger and more complex the project, the more expensive it will be. It is essential to be realistic about your expectations and be aware that unexpected issues may arise.

B. Materials Used 

The cost of materials can vary greatly, from basic to high-end products. Choosing high-quality materials is important, but you also need to keep the budget in mind.

C. Location of the Property

The location of your property can also affect the cost of your extension or renovation. For instance, if your property is in a remote area, transportation costs may be higher.

D. Contractor's Rates

The rates charged by contractors can vary greatly. It is important to obtain quotes from several contractors to ensure you are getting a fair price.

Steps to Control Extension and Renovation Costs 

To keep costs under control, consider the following steps:

A. Set a Realistic Budget

Before you start any work, set a realistic budget. This will help you to avoid overspending and ensure you can complete the project within your means.

B. Plan the Project Carefully

Careful planning is key to a successful and cost-effective project. Consider all aspects of the work, including any unexpected issues that may arise, and plan accordingly.

C. Obtain Multiple Quotes from Contractors

Obtaining multiple quotes from contractors will help you to compare prices and ensure you are getting a fair deal.

D. Choose Quality Materials within Budget

Choosing high-quality materials is important, but you also need to ensure they fit within your budget. Consider alternatives, such as recycled or repurposed materials, to save money.

E. Consider DIY or Partial DIY

Taking on some of the work yourself can save you a considerable amount of money. However, it is important to be realistic about your skills and know when to call in the experts.

F. Be Prepared for the Unexpected

Unexpected issues can arise during any renovation or extension project. It is essential to have a contingency plan in place to deal with any unexpected expenses.

How to Implement Cost-Effective Strategies 

To better understand how to implement cost-effective strategies when renovating or extending your home, here are some examples:

  • DIY Painting: Painting is one of the most cost-effective ways to give your home a fresh look. You can save money by doing the painting yourself instead of hiring a professional. However, it is important to make sure you have the necessary skills and tools to complete the job successfully.
  • Repurpose Materials: Repurposing materials is a great way to save money while adding character to your home. For example, you could use reclaimed wood for a feature wall or build a coffee table out of an old pallet.
  • Use Cost-Effective Flooring Options: Flooring can be expensive, but there are cost-effective options available, such as vinyl or laminate flooring. These materials can give you the look you want while also being more affordable than other materials.
  • Focus on Energy Efficiency: Investing in energy-efficient upgrades can help you save money on your utility bills in the long run. For example, installing double-paned windows, adding insulation, or replacing old appliances with energy-efficient models can help you save money over time.
  • Opt for Simple Designs: The more complex the design of your renovation or extension, the more expensive it will be. Opting for a simple design can help you save money while still achieving the look you want.


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Renovating or extending your home is an exciting project, but it can also be expensive. By understanding the factors that affect the cost of the project and following cost-effective strategies, you can control your expenses and save money. Remember to plan your project carefully, choose quality materials within your budget, and be prepared for unexpected expenses. With these tips, you can achieve your dream home without breaking the bank.

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