Compare DIY Granny Flat Kit Providers in Australia
Save up to 30% by owner-building. We compare the best steel frame and timber kit suppliers, and tell you what the price tag leaves out.
A Kit Is a Supply Package, Not a House in a Box
You save the builder margin (around 20 to 30%), but you manage council approval, the slab, plumbing, electrical and the kitchen fit-out. Be honest about whether that suits you.
- Are you an organised project manager?
- Do you have a time buffer for delays?
- Are you comfortable with a variable budget?
- Do you have a strong network of trusted tradies?
FlatPack Building Kits
Wide Span Homes
Paal Kit Homes
Valley Kit Homes
Backyard Pods
Imagine Kit Homes
iBuild Building Solutions
Wide Span Homes
Portable Buildings Intl
Selecta Homes
Frame Steel
The Shed House
Total Home Frames
Wide Span Homes
Imagine Kit Homes
Steel Frames Trusses WA
Wide Span Homes
TR Homes
Ross’s Discount Home
Olympic Industries
Wide Span Homes
Spark Homes
Paal Kit Homes
Wide Span Homes
Paal Kit Homes
Shed City
Tasmanian Sheds
How to read this kit directory
Does a kit price include labour and certificates?
No. Kits are materials plus a manual. Owner-builder insurance, a private certifier, wet trades and energy certificates sit on you. Budget labour before you treat a "$45k kit" as a finished granny flat.
Can a kit skip council because it is "relocatable"?
Not on a private backyard in most metro areas. Confirm Class 1a vs caravan-class with your council. Energy rules still sit in the NCC via the ABCB.
How should I shortlist?
Match frame type (steel vs timber), depot location (delivery cost) and whether the kit is lock-up or full. The Granny Flat Guide Team does not sell kits; cards here are a starting shortlist, not an endorsement of DIY skill.
Primary sources
Size caps, approval pathways and dollar bands on this page are planning ranges. Check the current official page before you lodge or sign.
- NSW Planning Portal
- Victorian planning
- Queensland planning
- WA planning (DPLH)
- PlanSA
- Australian Building Codes Board
What You Need to Know Before You Buy a Kit
Four things that decide whether a kit saves you money or costs you sleep.
What’s in the kit (inclusions)
Most kits are sold at “lock-up stage”: steel or timber frames, roof trusses, external cladding, roofing iron, gutters and windows. They usually exclude the slab, plasterboard, insulation, kitchen, bathroom fixtures, electrical and plumbing.
Hidden costs beyond the price tag
Budget for council and certifier fees, site prep, utility connections, licensed trades, scaffolding and the internal fit-out.
Owner-builder vs hiring a builder
A true owner-builder gets maximum savings for the most effort. A kit-and-builder combo (buy the kit, then hire one licensed builder to assemble it) is a solid middle ground.
Steel vs timber frames
Steel is termite-proof, fire-resistant and precision-engineered, but harder to modify and needs thermal breaking. Timber is easier to change on site and carpenters prefer it, but it is susceptible to termites, rot and warping. For owner-builders, pre-punched steel frames are lighter and make assembly faster and more accurate.
Don’t Start Building Without a Budget
Material costs and council fees shifted again in 2026. Avoid budget blowouts with our free granny flat feasibility calculator.
- Estimate site costs (excavation, slab, crane)
- Compare kit, modular and custom build types
- Four-phase breakdown with instant results
Weighing Up Another Build Method?
The right path comes down to your budget, timeline and how hands-on you want to be. Compare the other two options.
