The Change
New Zealand has enacted reforms to both the Building Act and the Resource Management Act, allowing homeowners to build standalone granny flats of up to 70 square metres without needing building or resource consent. The changes took effect immediately on enactment and are expected to add approximately 13,000 additional dwellings to the housing stock over the next decade.
The reforms trim up to $5,650 in direct costs per project and can shorten the process by as much as 14 weeks. For builders with residential clients, that is a meaningful reduction in the friction that has historically discouraged smaller housing additions.
What’s Still Required
Consent-free does not mean standards-free. All work must still:
- Be completed by an authorised building professional — licensed building practitioners or registered engineers where required
- Meet all applicable Building Code requirements
- Be limited to simple, straightforward designs (complex or non-standard structures are not covered)
- Be notified to the relevant council before construction begins and again after completion
The notification requirement is important. Council notification is not consent, but it does create a paper trail and ensures the local authority is aware of the new structure for rates, services, and planning purposes.
Who This Opens the Market To
The most immediate beneficiaries are homeowners wanting to house elderly parents, adult children, or to generate rental income from their section. Beyond residential use, the exemption also creates opportunity for:
- Farmers and rural property owners needing staff accommodation
- Businesses wanting on-site housing for key workers
- Homeowners in areas with high housing demand who want to contribute to local supply
For builders, particularly those working in the light residential and renovation space, this is a new category of work that does not require clients to navigate the consenting queue. A capable builder with a compliant design can take a project from discussion to construction far faster than was previously possible.
The Construction Industry Angle
Minister Chris Penk described the change as a boost to industry productivity — more straightforward residential work, fewer administrative delays, and more homes being built by qualified tradespeople rather than sitting in planning limbo. Building and Housing Minister Chris Bishop positioned it as part of a broader push to make housing easier and more affordable to build across New Zealand.
The key message for contractors is to make sure their clients understand what “consent-free” actually means — and that the obligation to build to code, use authorised professionals, and notify the council remains fully intact. The paperwork changes; the standards do not.
