How Much Does Decking Cost in Melbourne?

Decking is one of the most common questions we are asked to price in Melbourne, and it is also one of the hardest to answer over the phone. Two decks that look the same size on a plan can involve very different amounts of work once the ground, the height, the access and the finishing details are taken into account.

This guide explains what actually drives the cost of a deck so you can understand a quote rather than compare numbers in isolation. We have deliberately not published prices or price ranges, because a figure quoted without seeing a site is not useful to you.

Why every deck is priced differently

A deck is a structure, not a surface. The boards you walk on are the last part of the job and often not the largest part of the cost. Underneath them sit footings, bearers and joists that have to carry load, resist movement and stay out of trouble with moisture. What sits under the deck is usually what separates one price from another.

• The size and shape of the platform
• The height above ground and how that height is supported
• Ground conditions and the footings required
• Subframe material and spans
• Board selection and fixing method
• Stairs, screens, balustrades and edge details
• Site access and how materials reach the work area
• Whether an existing deck or structure has to be removed

Size, shape and layout

Area matters, but shape matters too. A simple rectangle uses material efficiently and is quick to set out. Once you introduce angles, curves, steps in level, or a deck that wraps around a corner of the house, the amount of cutting, setting out and additional framing increases, and offcut waste rises with it.

Board direction also plays a part. Laying boards on an angle or in a pattern is achievable, but it changes joist spacing and adds labour.

How you plan to use the space

A deck intended for a table and chairs has different requirements from one that will hold an outdoor kitchen, a spa or heavy planters. Concentrated loads may need additional framing or footings, so it is worth telling your carpenter early what will sit on the deck.

Material selection: hardwood and composite

Board selection changes both the material cost and the way the deck is built. Hardwood and composite behave differently, use different fixing systems and have different maintenance expectations over time. Some composite systems also specify particular joist spacings, which affects the subframe below.

Neither option is automatically the right choice. We have written a separate comparison covering appearance, maintenance, weather exposure and comfort underfoot.

Ground preparation and footings

Before anything is built, the ground has to be prepared. That can mean clearing vegetation, removing an old slab or paving, levelling, and dealing with drainage so water is not trapped under the new structure.

Footings carry the deck into the ground. The number, depth and size of footings depend on the height of the deck, the loads it carries, the spacing of posts and the conditions on site. Sloping ground, reactive soil, rock, tree roots, and existing services all influence how footings are formed and how long that stage takes.

• Sloping sites generally need deeper or stepped footings
• Excavation near services has to be approached carefully
• Poor drainage may need to be resolved before framing starts
• Hand excavation in tight yards takes longer than machine work

Timber or steel subframe

The subframe is the structure of bearers and joists that sits between the footings and the boards. Treated timber subframes are common and well understood. Steel subframe systems are also used, particularly where long spans, low clearances or dimensional stability are a priority.

The choice affects cost in more than one direction. A steel subframe can carry different spans and may reduce the number of posts and footings, while a timber subframe may suit a simpler deck. What matters is that the subframe is designed for the span, the loads and the exposure, not chosen only on the price of the material.

Site access

Access is one of the least visible cost drivers and one of the most real. Where a vehicle can reach the work area, materials and waste move quickly. Where every board, bag of concrete and barrow of spoil has to travel through a house, down a side path or over a fence, labour time increases for the same finished deck.

Narrow side entries, steep driveways, limited parking, shared access and restricted working hours in some streets all belong in this category. Mentioning access when you make contact helps avoid surprises later.

Stairs, screens and balustrades

The flat platform is rarely the whole job. Stairs require their own framing, stringers, treads and footings, and their cost increases with height and width. Balustrades add posts, fixings and infill. Privacy screens, skirting to close in the underside, and built-in seating or planters all extend the scope.

These elements are worth deciding on before quoting, because adding them later can mean revisiting framing that is already built.

Removing an existing deck

If there is a deck already in place, removal is part of the job. That includes demolition, disposal, and dealing with whatever is found underneath. Old footings may need to be removed or worked around, ground conditions may be different from what was expected, and drainage problems that were hidden by the old structure often become visible at that point.

Sometimes a full replacement is not required. If your existing deck is tired rather than failing, it is worth assessing what is actually wrong before deciding.

What we need in order to quote properly

With that information we can talk sensibly about scope. Where something cannot be determined from photos, such as ground conditions or the state of an existing subframe, an onsite look is usually the next step.

In summary

Decking cost in Melbourne comes down to the structure below the boards as much as the boards themselves. Size and shape, ground preparation, footings, subframe, access, stairs and demolition all move the number. The more accurately you can describe your site, the more accurate the quote you receive will be.