Alfresco Cost in Perth (2026)
Perth's outdoor-living climate and easy sandy slabs make the alfresco a near-standard inclusion.
Your alfresco details
A typical new build alfresco is 20 to 35 square metres, roughly the size of a large living room.
Your estimate sits within the typical range.
Decide early whether this is an outdoor room or an enclosed room, because the answer changes the approval pathway, the code requirements and roughly a third of the budget.
💰 Ways to save
- Build the alfresco during the house build or renovation rather than afterwards. The slab can be poured in the same pour, the roof can tie into the house structure while the framing is exposed, and the electrical and plumbing rough in happens with the trades already on site. Doing it as a separate project later commonly costs 25 to 40 per cent more for exactly the same finished result.
- Choose an insulated roof panel over plain Colorbond even though it costs more. A plain steel roof over an alfresco radiates heat downward through summer afternoons to the point where the space is genuinely uncomfortable in the hours you most want to use it, which means an expensive area you avoid. The insulated panel typically adds 15 to 20 per cent to the roof cost and makes the difference between a space you use and one you look at.
- Rough in far more services than you plan to use. Additional power points, a gas point, a water point and drainage laid in while the slab is open cost very little each, whereas retrofitting a single outlet into a finished tiled alfresco means cutting concrete and making good. Even if the outdoor kitchen is a stage two ambition, put the services in stage one and cap them off.
- Get quotes for the same roof size but different systems, and be honest about how you will use the space. A louvred opening roof is a genuinely brilliant product and costs 70 to 80 per cent more than a fixed insulated panel, and it earns that in a courtyard where you want winter sun and summer shade. On a south facing alfresco that is always shaded anyway, it is an expensive mechanism solving a problem you do not have.
or from $85/week over 5 years , indicative finance
How we estimate this
## What an alfresco costs in Australia in 2026
Pricing reviewed: June 2026.
What a alfresco costs in Perth
The alfresco is close to a default in Perth homes, suited to the long hot Mediterranean summers and the strong outdoor-entertaining culture, so demand runs to generous covered areas with kitchens and built-in barbecues. The sandy, free-draining soils are quick and cheap to excavate and give a straightforward base for a slab, which helps keep the groundwork affordable, and labour sits near the national average.
Double-brick is the dominant construction, so an alfresco built into or onto the home ties into masonry rather than timber frame, and the fierce summer sun is the material factor: UV degrades cheaper fabrics, timber and fixings quickly, so UV-stable products and quality hardware are worth the premium. Isolation adds freight and lead time to any specialist or imported materials from the eastern states, which can lift the cost of a non-standard design or a premium outdoor kitchen.
Compare against the national picture: Alfresco Cost in Australia →
Alfresco Cost in other cities
Frequently asked questions
How much does an alfresco cost to build in Australia?
A simple Colorbond covered area over existing paving starts around $400 to $600 per square metre, so roughly $10,000 to $15,000 for 25 square metres. A well specified alfresco with insulated roof, new slab, tiling, lighting and fans runs $700 to $1,100 per square metre. Add a full outdoor kitchen, screens and a louvred roof and it reaches $1,300 to $2,200 per square metre.
Is an insulated roof panel worth the extra cost over plain Colorbond?
Almost always. Bare steel radiates heat downward in full sun to the point where the space is uncomfortable through the exact afternoon hours you want to use it. An insulated sandwich panel typically adds 15 to 20 per cent to the roof cost and is the difference between an outdoor room you use daily and an expensive area you look at from inside.
Do I need approval to build an alfresco?
An open sided covered alfresco often falls within exempt or complying development depending on your council's area, height and setback thresholds. Fully enclosing it with glazing or solid walls generally does not, because it can then be assessed as habitable floor area, triggering code requirements for ventilation, energy efficiency and fire separation, plus a development application and site coverage implications.
What does an outdoor kitchen add?
A basic bench with a built in barbecue and storage adds $4,000 to $9,000. Adding a sink, a bar fridge, weatherproof cabinetry and a stone top takes it to $12,000 to $25,000. The overlooked costs are the trades, since a sink needs a legal wastewater connection, gas appliances need a licensed gasfitter and a compliance certificate, and cabinetry must be genuinely rated for external use.
Are louvred opening roofs worth it?
In the right orientation, yes. They cost 70 to 80 per cent more than a fixed insulated roof, and they earn it on a north or west facing courtyard where you want winter sun and summer shade from the same structure. On a south facing alfresco that is shaded regardless, the mechanism is solving a problem you do not have and a fixed insulated panel is better value.
What is the most common alfresco defect?
Water tracking back into the house. The slab must fall away from the building at an adequate grade, the finished external level has to sit below the internal floor level and below the damp proof course, and there needs to be a drainage path for wind driven rain. Get the fall and drainage strategy stated in writing before anyone pours concrete.