How much does decking cost?

Thinking about adding a deck to your outdoor space? The cost of decking in Australia typically ranges between $200 and $1,000+ per square metre, depending on materials, deck size, and other factors.

A well-designed deck can transform your backyard into a stylish, functional entertaining area—without breaking the bank. In fact, decking costs can sometimes be more affordable than paving, making it a great investment in both lifestyle and home value.

Whether you’re planning a DIY deck or hiring a professional, understanding the decking cost per m2 can help you budget effectively. In this guide, we’ll cover:

• How decking cost per m2 varies

• Key factors that influence decking prices

• Cost breakdown by deck size

• Deck balustrade pricing

• Different decking materials and their costs

• How to get an accurate decking quote

Let’s dive into everything you need to know about decking costs in Australia.

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How much does a deck cost?

How much does decking cost? The cost of decking varies depending on the size, materials, and additional features like stairs or roofing. On average, you can expect to pay anywhere from $3,000 to $11,500 for a deck, with most projects falling between $5,000 and $10,000.

Material choice is a major factor in pricing. For example, basic treated pine decking starts at around $200 per square metre, while hardwood and composite decking come at a higher price point.

Here’s a breakdown of decking cost per square metre based on material type:

No matter what material you choose — from affordable treated pine to premium composite decking —there’s an option to suit every budget.

A custom timber deck not only enhances your outdoor space but also adds value to your property. Your local decking specialist can help you explore different materials, styles, and price points to create a deck that suits your needs.

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Factors that affect decking prices

The cost of decking per m² depends on several factors, from material choices to installation complexity. When budgeting for your new deck, consider the following key factors:

1. Materials

The type of decking material significantly impacts the total cost. For example:

• Treated pine is one of the most affordable options.

• Hardwoods like Ironbark or Merbau are more expensive but highly durable.

• Composite decking generally costs more upfront but requires less maintenance over time.

2. Size and Layout

A larger deck requires more materials and labour, increasing the overall cost. Complex layouts, such as multi-level decks or those with curves and built-in features, also add to expenses.

3. Labour Costs

Labour costs vary based on:

• Location and local labour rates

• The complexity of the design (e.g., intricate patterns or elevated structures)

• Whether additional specialists (e.g., electricians for lighting) are needed

4. Site Preparation & Accessibility

• If the site requires levelling, tree removal, or other preparation, costs will rise.

• Difficult-to-access areas (e.g., sloped or uneven terrain) may require extra materials and labour.

5. Permits and Codes

Obtaining the necessary permits and ensuring compliance with local building codes may incur additional costs. This can include fees for permits and inspections.

6. Accessories and Finishes

Extra features can increase costs, including:

• Built-in seating, planters, or lighting

• Railings and balustrades (mandatory for raised decks)

• High-quality stains, sealants, or finishes for added durability

7. Demolition and Disposal

If replacing an existing deck, factor in the cost of demolition and disposal of old materials.

8. Market Conditions

Material and labour prices fluctuate based on market demand, supply chain issues, and economic conditions.

Final Thoughts

Decking costs vary widely depending on these factors. To get the best value, compare multiple decking quotes from local contractors and consider all aspects of your project before making a decision.

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Types of decking materials

Choosing the right decking material is one of the most important decisions when planning your outdoor space. While basic treated pine is a budget-friendly option, premium materials can cost up to $1,000 per square metre, significantly impacting your overall decking cost.

Here’s a breakdown of the most popular decking materials:

1. Treated Pine – Affordable & Versatile

Treated pine is one of the most cost-effective decking materials. It’s durable, easy to stain or paint, and can be customized to suit your style. Despite its affordability, treated pine remains a strong and long-lasting choice when properly maintained.

2. Hardwood Timber – Mid-Range & Stylish

For a balance between durability and aesthetics, hardwood decking is a popular option. With a variety of species available, including Merbau, Spotted Gum, and Ironbark, hardwoods offer a natural, premium finish that complements both modern and traditional homes.

3. Composite Decking – Low Maintenance & Durable

At the higher end of the price range, composite decking is designed to look like natural timber but requires far less upkeep. Made from a blend of wood fibers and plastic, it is:

• Highly durable and resistant to rot and pests
• Available in a variety of colours and styles
• Low-maintenance—no staining, sealing, or painting required

Choosing the Right Timber for Your Deck

If you’re unsure which timber suits your needs, consult a local supplier about durability and weather resistance. Popular Australian hardwoods like Blackbutt, Merbau, Ironbark, Jarrah, and Spotted Gum are excellent for outdoor use, offering superior strength and longevity.

No matter which material you choose, investing in quality decking ensures a beautiful and long-lasting outdoor space.

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Merbau decking cost per m2

How much does Merbau decking cost per m²? Merbau timber decking is a popular choice due to its rich colour, durability, and fire-resistant properties, making it ideal for homes in bushfire-prone areas.

On average, Merbau decking costs between $300 and $350 per square metre, including materials and installation.

One of the biggest advantages of Merbau is its strength and versatility — not only is it commonly used for decking, but also for outdoor furniture, screening, and other exterior projects.

If you’re looking for a long-lasting, high-quality decking material, Merbau is a fantastic investment that offers both aesthetic appeal and durability.

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How much does it cost to build a deck by size?

While decking cost per m² is largely influenced by the choice of materials, the size of the deck also plays a significant role in the total timber decking installation cost. Larger decks generally cost more, and depending on the size, you may also need council approval before construction begins.

Here’s an overview of the average decking costs based on size:

For the most accurate pricing, it’s best to get a decking quote from local professionals based on your specific design, materials, and location.

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Deck balustrade costs

If your deck is elevated or encloses a pool area, installing balustrades or handrails that comply with state building codes is essential. These additions enhance safety and should be factored into your total decking expenses.

The cost of a timber and wire balustrade starts at $180 per metre, while a glass balustrade is a more premium option, costing around $320 per metre.

For the most accurate pricing and to ensure compliance with regulations, it’s best to consult a local decking professional.

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Getting a decking cost quote

Still wondering how much to build a deck? To get an accurate decking quote, research local builders and provide them with all the essential details of your project. Be sure to request a written quote with a detailed breakdown of costs, including both materials and labour.

It’s a good idea to compare at least three different quotes to get a sense of local pricing. Additionally, consider the builder’s reputation and ensure they provide references to help you make an informed decision.

Before hiring a deck builder, be sure to ask these key questions:

• Are you licensed and insured?

• What’s the estimated timeline?

• Can you provide a written quote?

• Will you handle council approval?

• Do you have references and examples of past work?

Taking the time to research and ask the right questions will ensure that you hire a skilled professional who can deliver quality results within your budget.

Want to find a decking contractor in Sydney, Melbourne, Brisbane, Adelaide, or Perth?

*All costs and prices quoted were sourced at the time this cost guide was written and should only be used as an estimate.