We don't sell DIY kits, but clients ask us about them often enough that we wrote this page. DIY kits can be a good fit for the right person on the right block. They're a bad fit for most.
This is the honest take, including the bits the kit retailers don't put in their ads. If after reading you decide DIY is the right call, we can recommend a couple of decent kit suppliers. If you decide a builder-install is the right call, you know where to find us.
When DIY makes sense
DIY carport kits are a reasonable choice if you tick most of these boxes.
- You're a competent handy person. Comfortable with concrete pours, levelling, structural fastening, working at height.
- You have or can rent the right tools. Mitre saw, impact driver, ladder, possibly a small excavator for footings.
- You're comfortable arranging your own council approval. Or willing to use a draftsperson and structural engineer.
- Your block is straightforward. Flat, accessible, standard soil, no tricky existing wall to attach to.
- You have weekends to give it. A DIY single carport realistically takes 2 to 4 full weekends. Doubles take 4 to 6.
- You can self-certify or arrange post-install inspections. Required by most councils.
When DIY is a bad idea
DIY is the wrong call if any of these apply. The math usually doesn't work out the way the kit ads suggest.
- You're learning as you go. Carports are structural builds. The cost of getting it wrong is a structural failure, not a wonky shelf.
- You don't have time over 2 to 6 weekends. Materials sitting on your driveway for a year is the most common DIY outcome we see.
- Your block has a slope, existing wall, or unusual soil. Kit instructions assume standard conditions.
- You'd value the warranty. DIY kits carry materials warranties only. No workmanship warranty because you did the work.
- You plan to sell in the next 5 years. DIY carports without engineering certification can be flagged at building inspection and reduce sale price.
- You'd struggle with council push-back. 30% of DIY submissions get rejected or paused at first review.
Real cost comparison
Kit ads quote materials cost, not total install cost. By the time you add in engineering, council, tool rental, concrete and your own time, the gap to a builder-install closes substantially.
| Cost line | DIY kit | Builder install |
|---|---|---|
| Materials kit | $3,500 to $5,000 | Included |
| Concrete and footings | $800 to $1,200 | Included |
| Engineering certificate | $600 to $1,200 | Included |
| Council application | $400 to $700 | Included |
| Tool rental (mitre, drill, ladder) | $200 to $400 | Included |
| Your time (40-80 hours at minimum wage) | $1,000 to $2,000 opportunity cost | Included |
| Total realistic DIY | $6,500 to $10,500 | $7,500 to $10,500 |
| Warranty cover | Materials only | Lifetime workmanship + materials |
The gap is usually $0 to $2,000, plus 80 hours of your time
For most clients, the DIY savings are smaller than they look. If you enjoy the build process and have the time, that's a reasonable trade. If you're hoping to save thousands, the math rarely works out.
What we'd recommend either way
- 1.Get both a DIY kit quote and a builder-install quote. Compare on real total cost, not headline materials cost.
- 2.Factor in your time honestly. 40 to 80 hours of weekends is real.
- 3.Confirm the kit supplier provides engineering certificates for council. Many don't.
- 4.Confirm whether you can arrange the council approval yourself or need a draftsperson.
- 5.Read the warranty document, both for DIY and builder-install. Compare what's actually covered.
- 6.Walk through worst-case scenarios. What happens if the structure fails in year 5? Year 15?
