1. Size
It goes without saying that the bigger the carport, the more materials and labour it requires. A single carport typically fits one vehicle, while a double carport accommodates two. If you’re planning to park a boat, trailer, or caravan, make sure you allow for extra height and clearance. And even if you don’t need the space right now, it’s worth thinking long term.
2. Material Choice
Your material selection has a big impact on both price and look. The most common materials include:
- Treated Pine Timber: This is the most common budget-friendly and practical option
- Engineered Timber: Good for longer spans where posts are further apart
- Hardwood Framing: Merbau is a popular choice for stained timber finishes producing an attractive high-end design
- Galvanised C-sections: Practical and cost-effective, although a little outdated and industrial looking
- Galvanised Structural Steel: Good for spanning even greater distances between posts, in excess of 6m. Strong and durable.
- Powder-coated steel box sections: The most common and practical alternative to conventional steel beams. They come pre-powdercoated, are relatively light so are easier to install, and come with standard brackets and fixings to compliment the overall design of the structure.
Tip: Treated pine timber and powder-coated steel box sections are the most popular options available for homeowners, balancing style, durability and price.
3. Roof Design
Your roof style matters, both in terms of looks and budget. Here are the most popular roof styles:
- Flat roof – Simple and economical to build.
- Skillion roof – A modern, single-sloped design that adds style without too much complexity.
- Gable roof – Offers a more traditional look and allows for better water runoff and airflow.
- Dutch gable or hip roof – More complex, and therefore more expensive, but great for matching existing architecture.
Expect design upgrades to add $1,000–$5,000+, depending on complexity and size.
4. Customisation & Extras
If you’re building a carport as part of a bigger outdoor project, for example, adding an entertaining area or a storage shed, you’ll need to factor that in. Some popular extras include:
- Tiled Roof to match the house
- Decking
- Pergolas attached to carports
- Lighting and electrical points
- Enclosed storage or lock-up shed
- Timber screening for privacy
- Matching finishes to your home façade
- Integrated drainage or gutters
These touches make your carport more functional (and better-looking), but they’ll also add to the total cost. For example, a custom timber carport with a gable roof, lights, and storage could easily reach $30,000 or more installed, especially in premium suburbs like Elwood or Hampton. On the other hand, a basic carport with roller door on a flat block in outer suburbs like Point Cook might come in under $20,000.
5. Site Conditions
Building on a flat, easily accessible site is straightforward. But if your block is sloped, tree-covered, or has drainage issues, you may need to spend more on preparation and engineering.
If you live in a suburb with tighter setbacks or bushfire regulations, such as parts of the Dandenong Ranges, you may also face additional compliance costs.
