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The Cost of Building a Deck in Sydney: What to Expect

cost-of-building-decks in Sydney
June 6, 2023

If you're fortunate enough to live in Sydney, you know just how unique the outdoor lifestyle can be. From the stunning beaches to the lush parks, there's no shortage of ways to enjoy the beautiful weather and scenery.

But have you considered adding a deck to your outdoor living space? Not only does it provide an ideal spot for relaxing and entertaining, but it can also augment the value of your home and provide a range of other benefits.

From hosting barbecues with friends and family to relaxing with a good book in the sunshine, a well-designed and well-built deck can be the perfect place to unwind and enjoy the best of Sydney's outdoor living.

If you are considering building a deck, read on to discover the benefits and costs of bringing this quintessential Aussie feature to your backyard.

Understanding the Structure of a Deck: A Technical Overview

A deck is a raised outdoor typically constructed from timber or composite materials attached to a house or other building and extends over the surrounding ground or landscape.

Decks are often elevated above the ground and supported by a framework of posts and beams, serving a flat and stable surface for dining, relaxing and entertainment.

A deck typically consists of a series of horizontal boards or planks, known as decking, secured to a substructure of joists and beams. The decking is often grooved or patterned to improve traction and prevent slipping, and the edges may be profiled or finished for aesthetic appeal.  

The substructure is usually made from treated pine or other durable materials that can withstand exposure to the elements and resist rot, insects, and decay.

The framing system is typically anchored to the house or building using special brackets and bolts and may also include concrete footings or piers for added stability.

Factors that Affect the Cost of Building a Deck

When it comes to building a deck, several factors can impact the project's overall cost. Homeowners must consider the following elements when determining the budget for their deck:

Size and Shape

The size and shape of the deck are crucial factors in determining the overall cost. Larger decks require more materials and labour, which can increase the overall cost. Additionally, irregularly shaped decks may require more complex design and construction techniques, adding to the overall cost.


The type of materials used to construct the deck can significantly impact the cost. The most popular materials for decking in Sydney are timber and composite decking.

Hardwood timber is typically more expensive than softwood timber, while composite decking tends to be the most expensive option due to its low maintenance and durability.


The deck design also plays a significant role in determining the overall cost. A complex and intricate design, such as multiple levels or built-in features like seating or lighting, will require more materials and labour, increasing the overall cost.


The cost of labour is another essential factor to consider when building a deck. The labour cost can vary depending on whether you hire a professional deck builder or opt for a DIY approach.

While hiring a professional will increase the overall cost, it can ensure that the project is completed efficiently and to a high standard.

How Each Factor Impacts the Overall Cost of a Deck

By understanding how each of these factors impacts the overall cost of a deck, homeowners can make informed decisions that align with their budget, lifestyle, and preferences.

For example, if budget is a primary concern, choosing a more straightforward design and less expensive materials can help keep costs down.

On the other hand, if the homeowner values a low-maintenance deck and is willing to pay more upfront, composite decking may be the best option.

It's also important to note that while certain factors may increase the overall cost of a deck, they can also add value to the home.

For example, a well-designed and constructed deck can improve the property's overall weight, making it a worthwhile investment.

Cost Breakdown of Building a Deck in Sydney

To help homeowners plan for their deck project, providing a detailed cost breakdown based on different materials, sizes, and designs is essential. Here is a general overview of the cost breakdown of building a deck in Sydney:


As previously mentioned, the materials used to construct a deck can significantly impact the overall cost. Here are some estimated costs for different decking materials per square meter:

Softwood timber: $170-$300

  • Cedar - $90 to $120
  • Redwood - $115 to $140

Hardwood timber: $350-$600

  • Merbau - $75 to $90
  • Jarrah - $120 to $130
  • Spotted Gum - $70 to $180
  • Karri - $55 to $80
  • Blackbutt - $90 to $200
  • Ironbark - $110 to $160

Composite decking: $400-$1,000

  • Trex decking - $220 to $300

Custom balustrades, pergolas, lighting, and other amenities are additional costs.

Size and Shape

The size and shape of the deck are also critical factors in determining the overall cost. Here are some estimated prices for different deck sizes:

  • Small deck (up to 10 square meters): $2,000-$5,000
  • Medium deck (up to 25 square meters): $5,000-$15,000
  • Large deck (up to 50 square meters): $15,000-$30,000


The design of the deck can also significantly impact the cost. Here are some estimated costs for different deck designs:

  • Basic deck design: $150-$250 per square meter
  • Mid-range deck design: $250-$450 per square meter
  • High-end deck design: $450-$1,000 per square meter

It's important to note that these costs are estimates only and may differ depending on various factors, such as the complexity of the layout, the specific materials chosen, and the cost of labour. Additionally, permits and other fees may also add to the overall cost.

By considering these factors and obtaining quotes from multiple deck builders, homeowners can get a better idea of the overall cost breakdown of their deck project and make informed decisions that align with their budget and design preferences.

Comparing the Cost of Timber and Composite Decking Material: Pros and Cons

When considering the materials for a deck, the two most common options are timber and composite decking. Here is a cost comparison and the pros and cons of each material:

Timber Decking


  • Natural Look and feel
  • A variety of timber species and colours are available
  • Can be Stained or painted to match a homeowner's style
  • Cost-effective compared to composite decking


  • Requires more maintenance, such as sanding and staining
  • It can be prone to disintegrate, warping, and splintering over time.
  • Not as durable as composite decking

Composite Decking


  • Low maintenance and easy to clean
  • Highly durable and long-lasting
  • Resistant to rot, warping, and splintering
  • It comes in a spectrum of colours and styles


  • More expensive compared to timber decking
  • Less natural Look and feel
  • Limited options for customization
  • Can heat up in hot weather

Cost Comparison

The cost of composite decking is generally higher than timber decking, with an estimated cost of $400- $1,000 per square meter compared to $170-$300 per square meter for softwood timber and $350-$600 per square meter for hardwood timber.

However, composite decking requires less maintenance, making it a more cost-effective option in the long run.

Ultimately, the choice between timber and composite decking comes from personal preferences and budget.

Impact of Deck Designs on Cost

The design of a deck can significantly impact the overall cost. Here are some examples of how different deck designs can affect the price:

Curved Decks

Curved decks are an increasingly popular design choice, but they can be costlier due to the extra labour and materials required to create the curves. The more intricate the curve, the higher the cost will be.

Multi-level Decks

Multi-level decks are a splendid way to add dimension and depth to an outdoor space. However, this design can also increase the cost of the project.

Building a multi-level deck requires more framing and supports, which can add to the labour cost. Additionally, the materials for each level may need to be different, depending on the desired aesthetic, which can also add to the price.

Raised decks

Raised decks are popular for homes with sloped or uneven yards. However, this design can also increase the cost of the project.

Raised decks require additional supports, framing, and footings, which can add to the labour cost. The height of the deck may require the installation of railings, which can add to the material cost.

Tips for Reducing the Cost of Building a Deck

 Building a deck is an exciting home improvement project but can also come with a significant cost. Here are some tips for homeowners looking to reduce the cost of building a deck without sacrificing quality.

Choosing a Simple Design

A deck need not be an architectural marvel to be beautiful. In fact, sometimes, simplicity is the key to elegance. By choosing a clean, minimalist design, you can save money and make a bold, sophisticated statement.

A simple deck design with sharp lines and sleek shapes can convey an air of modernity and provide a refreshing change from the more intricate, ornate styles.

Using Sustainable Materials

Sustainability is a new luxury. And there's no better way to create a sustainable deck than by employing eco-friendly materials.

From recycled plastic to composite decking, sustainable materials are durable, resistant to wear and tear, and have a low carbon footprint. Plus, they offer a vast array of hues and textures that can enhance the aesthetic appeal of your deck.

  • Plastic lumber
  • Reclaimed wood
  • Bamboo Decking

These materials may cost more upfront but can last longer and require less maintenance, saving the homeowner money in the long run.

Comparing Quotes from Multiple Decking Service Providers

As with any major project, shopping around for quotes from multiple decking service providers is always a good idea. This way, you can compare the costs and services of different providers and choose the one that offers the best value for your money.

Remember, the cheapest option is only sometimes the best one, so be sure to factor in the quality of work, reputation, and customer service before making your decision.

Note: Building a Deck is an investment towards your home and well-being. By following these tips and getting creative, you can build a stunning, sustainable, cost-effective deck that will bring joy and relaxation for years.

Maximizing Value: Making Informed Decisions for Your Deck

 Building a deck is a weighty deal that requires careful contemplation of cost and quality. Homeowners must strike a delicate balance to ensure they get the best value for their money.

To achieve this balance, it's crucial to make informed decisions considering various factors such as budget, lifestyle, and personal preferences.

One way homeowners can ensure they make informed decisions is by seeking the advice of a professional decking service.

These experts have the experience and knowledge to guide homeowners through the selection process, recommend suitable materials and designs, and ensure that the deck is constructed to the highest standards.

By working with a professional decking service, homeowners can rest assured that they will receive a high-quality deck that meets their unique needs and preferences without breaking the bank.

With careful planning and expert guidance, building a deck can be an amusing and rewarding experience that adds value to the home and enhances outdoor living.

Time and Duration

The duration it takes to build a deck can also depend on factors such as the climate and availability of materials.

Generally, building a small to medium-sized deck can take one to three weeks, with larger or more complex decks taking several weeks to several months to complete.

Likewise, the ideal time is during the dry season, typically from late winter to early summer, when there is less chance of precipitation or moisture that could affect the construction process or the quality of the finished deck.


As you've discovered, building a deck in Sydney involves several factors that can impact the cost. From the size and shape of the deck to the materials and design chosen, there are many decisions that homeowners must make to create the perfect outdoor living space.

However, by understanding these factors and taking advantage of tips for cost reduction, homeowners can create a beautiful and functional deck without getting broke.

At All In One Renovation, we specialize in creating custom decks that meet our client's unique needs and preferences. Our team of skilled professionals can guide you through the entire process, from selecting suitable materials to designing a deck that fits your lifestyle and budget.

With our help, you can enjoy the benefits of a stunning outdoor living space that adds worth to your home for years to come.

So, if you're ready to take the next step in creating the deck of your dreams, contact us today for a free quote. We look forward to working with you!

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