What Perth businesses advertise
These are the businesses' own published price guides, checked in November 2026. They are not quotes, and they change.
| Type | Advertised range | Source |
|---|---|---|
| DIY single carport kit (materials only) | $2,000 to $5,000 | Phoenix Patios |
| DIY double carport kit (materials only) | $4,000 to $7,500 | Phoenix Patios |
| Single carport, installed | $5,500 to $8,500 | Phoenix Patios |
| Double carport, installed | $7,000 to $12,500+ | Phoenix Patios |
| Double carport kit | From $7,500 (low wind areas), with WA pricing 20% higher | Modern Steel Buildings |
Phoenix Patios also lists site preparation at $1,500 to $6,000 and stormwater drainage at $500 to $1,500, and says gable roofs cost 20 to 30% more than flat (skillion) roofs.
What pushes the price up
- Size and height: a double (about 6 m x 6 m) costs more than a single (about 3 m x 6 m). Extra height for a 4WD or caravan adds more.
- Roof style: flat is cheapest; gable costs more.
- Ground: sloping or uneven ground, or a new slab, adds to the bill.
- Extras: drainage, lighting or an EV charger (licensed electrician needed).
The approval costs
Most carports in WA need a building permit. The government fees are small next to the build:
| Fee | Amount | On a $10,000 carport |
|---|---|---|
| Building permit (BA2, uncertified) | 0.32% of the value, at least $121 | $121 |
| Building Services Levy | $61.65 for work up to $45,000 | $61.65 |
| Total government fees | $182.65 |
A carport in the front setback, or one that doesn't meet the R-Codes, may also need planning approval, which has its own fee. You'll also usually need engineering for the structure, which kit suppliers often include.
See the full breakdown in carport approval cost in Perth, or check whether yours needs planning approval with the front setback carport calculator.
Comparing quotes
Ask each supplier what's included: engineering, the permit application, footings or slab, drainage and the wind rating for your area. A cheap kit quote may leave the approval and site work to you.