Deck Building Costs in Sydney: A Comprehensive Guide for Homeowners

In Australia, decks are synonymous with outdoor living. The perfect deck can transform your backyard into an inviting outdoor retreat where you can relax, entertain, and enjoy the great outdoors. However, building a deck can be a significant investment, and understanding the factors that influence the cost of building a deck is essential. In this article, we will take a comprehensive look at deck building costs in Sydney, covering factors that impact costs, breaking down the various expenses, and providing tips for saving money on your deck project.

Factors That Influence Deck Building Costs

1. Size of the Deck

The size of the deck is a major factor that affects the overall cost of the project. Naturally, a larger deck requires more materials and labour, resulting in higher costs. As a rule of thumb, the larger the deck, the higher the overall cost.

2. Materials Used

Your choice of decking materials plays a significant role in determining the cost of your deck. There are several options to choose from, each with its own advantages and disadvantages. Popular materials include hardwood, composite, and pressure-treated lumber. Hardwood, such as merbau or spotted gum, offers a premium look and excellent durability but is also more expensive. Composite decking is a mix of wood fibres and plastics that require minimal maintenance but can be pricier than traditional lumber. Pressure-treated lumber is the most affordable option but may not offer the same aesthetic appeal as hardwood.

3. Complexity of Design

More complex deck designs often come with higher costs. Multi-level decks, built-in features, or unique shapes require more labour and materials than simpler designs. If you want a more intricate deck design, be prepared to pay a premium for the added complexity.

4. Labor Costs

Labour costs for deck building can vary widely depending on factors such as the builder’s skill level, geographic location, and the time of year. Experienced builders may charge more, but they can often deliver higher-quality work. Deck building costs can also be higher during peak construction seasons when demand for builders is high.

Breaking Down the Costs of Building a Deck

1. Base Price

The base price for building a deck in Sydney typically starts around $200 to $300 per square meter for a basic deck. However, this is just a starting point, and actual costs can vary significantly based on the factors mentioned above.

2. Cost Per Square Meter

Deck builders in Sydney often provide quotes based on cost per square meter. The average cost per square meter for common decking materials ranges from $300 for treated pine, $420+ for hardwood, and $450+ for composite decking. Keep in mind that these are averages and that the actual cost can vary based on your specific needs and preferences.

3. Additional Features

Adding features like railings, stairs, or built-in seating can significantly enhance the look and functionality of your deck, but they will also increase the overall cost. The price for additional features can vary widely depending on the materials used and the complexity of the design.

4. Permits and Inspections

Local councils in Sydney often require permits and inspections for deck construction. These fees can add to the overall cost of the project. Make sure to check with your local council to determine what permits and inspections are required for your deck project.

Tips for Saving Money on Your Deck Building Project

1. DIY Options

Taking a DIY approach to deck building can save you money on labour costs. However, deck building can be a complex task, and mistakes can be costly. If you’re not confident in your skills, it may be better to leave it to the professionals.

2. Shop Around

It pays to get multiple quotes from different deck builders. This allows you to compare costs and services, helping you find the best value for your money.

3. Consider Alternative Materials

Using less expensive decking materials, such as pressure-treated lumber, can help reduce the overall cost of your deck. These materials may not offer the same aesthetic appeal as hardwood or composite decking, but they can still provide a durable and functional deck at a lower cost.

4. Time Your Project

Building your deck during the off-season, when demand for builders is lower, can result in lower labour costs and better deals on materials.


Building a deck can be a significant investment, but it can also add value to your home and enhance your outdoor living space. Understanding the factors that influence deck building costs is key to budgeting for your project. By considering the size of the deck, the materials used, the complexity of the design, and labour costs, you can get a better idea of the overall cost of your deck project. Remember to shop around, consider alternative materials, and time your project to get the best value for your money. With careful planning and consideration, you can create a beautiful deck that suits your budget and enhances your outdoor space.