Imagine stepping out into your backyard to a beautifully crafted deck, a space perfect for entertaining guests, enjoying family barbecues, or simply relaxing with a book under the sun. While this dream is attainable, the cost of building a deck often becomes a stumbling block for homeowners. Misunderstanding the costs involved can lead to delays, unexpected expenses, or even abandoning the project altogether.
At TradeLyfe Carpentry & Renovations, we know how important it is to get your deck project right, from budgeting to final construction. In this guide, we’ll break down the factors that influence decking costs, typical price ranges, and how we can help you create a stunning outdoor space without breaking the bank.
Factors Influencing Decking Costs
1. Size and Area
The size and area of your deck are key factors in determining the cost. Larger decks require more materials and labour, which drives up the price. In Melbourne, decking costs typically range from $200 to $1,000 per square metre, depending on material, design complexity, and any added features. Larger or custom-designed decks with complex shapes or multi-levels will incur higher costs. Additionally, raised platforms, uneven ground, or the need for extra structural support or site preparation can add to the overall expense.
2. Materials
The choice of materials has the most direct impact on your decking costs, both initially and over the long term. Materials range from timber, which is more affordable, to premium options like composite or steel, which come with a higher upfront cost but often lower maintenance.
Timber Decking – Timber decking is a popular and affordable option for Melbourne homeowners, offering a natural look with species like Merbau, spotted gum, and treated pine. Typically priced between $100 and $300 per square metre, timber requires regular maintenance such as sealing or oiling to maintain its appearance and durability. It can also be vulnerable to damage from pests, moisture, and the elements.
When choosing timber, it’s important to compare species for their costs, maintenance requirements, and aesthetic appeal, especially when compared to composite decking.
Here’s a comparison of the cost per square metre for some of the most popular timber species:
| Timber Species | Cost (per square metre) |
| Merbau | $150 – $300 |
| Spotted Gum | $180 – $350 |
| Treated Pine | $100 – $150 |
| Blackbutt | $180 – $350 |
| Jarrah | $200 – $400 |
| Bamboo | $150 – $300 |
| Cedar | $250 – $400 |
Composite Decking – Composite decking, made from a blend of wood fibres and plastic, is becoming increasingly popular due to its low-maintenance nature. Although composite materials can range from $300 to $600 per square metre, they are highly durable and resistant to the elements.
Composite decking doesn’t require sealing or staining like timber does, and it’s resistant to warping, cracking, or splintering. This makes it an excellent choice for busy homeowners who want a beautiful deck without the hassle of regular upkeep. Many composite decking options also come with a warranty, which can provide peace of mind knowing your investment is protected.
Steel or Aluminium Decking – For a modern, sleek look, and exceptional structural strength, steel or aluminium decking can be an excellent option. These materials are especially popular for elevated decks or those requiring significant strength. They typically cost upwards of $500 per square metre, but their longevity and low maintenance make them a valuable investment. Steel and aluminium decks are highly resistant to rust, rot, and pests, and they often require little maintenance beyond occasional cleaning. Additionally, they can be coated with non-slip finishes, which makes them an attractive choice for poolside or coastal properties.
3. Labour and Installation
Labour costs can significantly influence your overall decking budget. In Melbourne, the cost of professional deck installation typically ranges from $50 to $150 per square metre, but this can vary depending on the complexity of the project and the tradespeople involved.
Several factors can affect labour costs:
Site Preparation and Levelling – If your deck requires substantial site preparation, such as clearing the ground, excavating, or levelling the area, this will add to the overall labour cost. Dealing with uneven ground, rocky terrain, or sloped areas can require additional expertise, tools, and time. A well-prepared foundation is essential to ensure the deck is level, stable, and safe.
Custom Designs and Unusual Shapes – If you’re looking for a deck with a unique shape or a custom design, expect to pay more for both materials and installation. Complex designs with curves, multi-level platforms, or specific angles require more intricate work and expertise. Custom features such as integrated seating, built-in planters, or non-standard railing designs can also increase the labour time needed.
Additional Features – Adding features like stairs, railings, or a complex structural design can drive up the cost of installation. Installing stairs, particularly for elevated decks, requires additional time and materials. Railing options vary widely in design and materials, from simple timber balustrades to glass panels or wrought iron, and each choice will impact the overall cost.
Labour costs will also depend on the experience of the tradespeople. Highly skilled carpenters or builders with years of experience in decking installations may charge a premium, but the added expertise often ensures a higher-quality finish and reduced risk of errors or delays.
4. Additional Features
Enhancements like roofing, built-in seating, or lighting can greatly improve the functionality and aesthetic appeal of your deck, but they will add to the overall cost. When planning your deck, it’s important to account for these optional upgrades, as they can quickly escalate the project’s price.
Pergolas and Roofs – Adding a roof or pergola to your deck can transform it into a functional all-weather space. The cost of building a pergola can range from $5,000 to $10,000, depending on the materials used (timber, steel, etc.) and the complexity of the design. A roof can provide shade and protection from the elements, making it a valuable addition if you plan to spend a lot of time outdoors. However, it’s essential to factor in the additional labour and structural supports required for this feature.
Built-in Seating – Custom-built seating can be a great way to maximise space on your deck while adding style and functionality. Built-in seating can cost anywhere from $1,000 to $4,000, depending on the size and complexity of the design. Not only does it eliminate the need for bulky outdoor furniture, but it also creates a more cohesive and seamless look for your outdoor space.
Lighting – Adding lighting to your deck can enhance its visual appeal and extend its usability into the evening. Outdoor lighting can range from $100 to $500 per fixture, with options such as built-in step lights, railing-mounted lights, or solar-powered fixtures. Installing lighting often requires electrical work, which can increase both labour and material costs.
Privacy Screens – If your deck is in close proximity to neighbours or a busy street, you may want to consider adding a privacy screen. These screens can be made from timber, glass, or modern materials like composite panels. The cost of privacy screens varies depending on size and material, but they can add anywhere from $500 to $2,000 to your decking project.
Average Cost per Deck Size (m2) Vs Material
Here’s a general breakdown of decking costs based on size and materials:
| Deck Size | Timber Deck (Cost) | Composite Deck (Cost) |
| Small (10 m²) | $2,000–$4,000 | $3,000–$6,000 |
| Medium (20 m²) | $4,000–$8,000 | $6,000–$12,000 |
| Large (30 m²) | $6,000–$12,000 | $9,000–$18,000 |
Why Choose TradeLyfe for Your Decking Project?
TradeLyfe stands out for its expertise and experience, with nearly two decades of delivering top-quality carpentry and renovations.
We take pride in offering tailored solutions, collaborating closely with you to design and construct a deck that perfectly suits your lifestyle and budget. Our team is known for its reliability, consistently meeting deadlines while maintaining clear and open communication throughout the project.
As a Melbourne-based business, we bring valuable local knowledge, ensuring a deep understanding of the region’s building codes, materials, and climate considerations.
Request a Decking Quote Today
Planning your dream deck is easier than you might think with TradeLyfe by your side. We begin with an initial consultation where we listen to your vision and budget, ensuring we’re aligned on your goals. Next, we conduct a thorough site assessment, evaluating your space to offer tailored recommendations that will work best for your needs. Once we have all the details, we provide you with a comprehensive, transparent quote that breaks down all costs involved, so there are no surprises.
A well-designed deck is more than just an outdoor feature, it’s an investment that enhances your home’s value and provides your family with a space for lasting memories. At TradeLyfe, we aim to make your decking journey smooth and stress-free, delivering a result that exceeds expectations.
Ready to make your outdoor vision a reality? Contact TradeLyfe Carpentry & Renovations today for a personalised decking quote, and let’s create the perfect space for your home!
FAQs About Decking Costs
How much does decking cost per m²?
In Melbourne, decking costs typically range from $200 to $1,000 per m², depending on materials and complexity.
What’s the price difference between timber and composite decking?
Timber is generally cheaper upfront, costing $100–$300 per m², while composite decking costs $300–$600 per m² but requires less maintenance.
Are there additional costs to consider?
Yes, include labour costs, site preparation, and optional features like lighting or roofing.