What is the difference between a granny flat kitset and a turnkey build?
A granny flat kitset supplies the building materials only, allowing the owner to manage construction, while a turnkey granny flat is fully built and completed by the builder, ready for occupation.
When planning a granny flat up to 70m², one of the most important decisions is whether to choose a kitset build or a turnkey solution. Both options can meet New Zealand building requirements, but they suit very different owners, budgets, and risk profiles.
What is a granny flat kitset?
A granny flat kitset is a supply-only option where the core building materials are provided as a package. The owner is responsible for engaging trades, managing construction, and ensuring compliance with the Building Code.
To see what is typically supplied, view our granny flat kitset materials guide.
What is a turnkey granny flat?
A turnkey granny flat is a fully managed build where the builder coordinates design, approvals, construction, completion, warranties and sign off’s. Once finished, the dwelling is ready for immediate use.
Key differences between kitset and turnkey builds
| Kitset Build | Turnkey Build |
|---|---|
| Materials supplied only | Fully built and completed |
| Owner manages trades and schedules | WaiBuild manages all trades and schedules |
| Lower upfront cost | Higher upfront cost ( less overall ) |
| Higher owner involvement | Minimal owner involvement |
| Greater risk if unmanaged | Lower risk with professional delivery |
Which option is right for you?
Kitsets suit experienced owners, builders, or those wanting flexibility and cost control where they have their own qualified trusted trades. Turnkey builds suit homeowners seeking certainty, fixed outcomes, and minimal involvement throughout the process.
Both kitset and turnkey options must comply with New Zealand regulations for granny flats up to 70m². For a full regulatory overview, see our granny flats up to 70m² guide.