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What is the basic consent test for a reroof?
| Situation | What the national guidance indicates | What to do next |
|---|---|---|
| Older roof cladding has reached normal service life and is replaced with comparable cladding in the same position | This can fall within the general repair, maintenance and replacement exemption if all conditions are met. | Confirm the full scope remains within the exemption and Building Code requirements. Sources: Building Performance. |
| Roof or relevant assembly failed before meeting its required durability | The Schedule 1 repair/replacement exemption does not cover repair or replacement of a component that failed Building Code durability requirements. | Check the consent position before work starts. Sources: Building Performance. |
| Material, structure, roof form or other scope changes materially | The comparable-replacement test may no longer fit the work. | Ask the council or an appropriately qualified professional to confirm the pathway. Sources: Building Performance; Building Performance. |
| You are unsure | Owners are responsible for deciding whether work is exempt. | Use the government consent checker and confirm uncertainty with the council or a suitable professional. Sources: New Zealand Government; Building Performance. |
Why does the age and failure history of the roof matter?
Building Performance gives an example of 20-year-old profiled metal cladding that has achieved its durability requirement and can be replaced with comparable profiled metal roofing under the exemption. The same guidance excludes repair or replacement where a component failed to satisfy the Building Code durability provisions. Sources: Building Performance.
That distinction is why a leaking roof should not automatically be treated as a routine consent-exempt replacement. The cause, age, assembly and proposed remedy can matter. Sources: Building Performance.
When does a Licensed Building Practitioner matter?
Restricted building work is residential work that is consented and affects primary structure or weathertightness. Where roofing work is restricted building work, an appropriately licensed LBP must carry out or supervise that work and provide the required records. Sources: Building Performance.
What should you confirm before work starts?
- Whether the existing roof is old enough and sound enough for the general replacement exemption to be relevant.
- Whether the proposed cladding and assembly are genuinely comparable or involve a material design change.
- Whether structural, fire-safety, drainage, penetrations or other building work is being added to the reroof.
- Whether the work is restricted building work and who holds the appropriate licence if it is.
- Whether your council has any project-specific requirements or advice.
What RoofHub cannot decide from an online question
RoofHub can explain the national guidance, but it cannot inspect the building, determine why a roof failed, decide whether two assemblies are legally comparable, or issue a consent exemption. For uncertain, unusual or failed-roof cases, confirm the position before physical work starts. Sources: Building Performance; New Zealand Government.
Related questions
Does replacing an old metal roof always need a building consent in NZ?
No. Comparable repair or replacement in the same position can be exempt if the Schedule 1 conditions are met. Important exceptions apply, including work on components that failed Building Code durability requirements. Sources: Building Performance.
Does consent-exempt roofing work still have to meet the Building Code?
Yes. Building Performance states that all building work must comply with the Building Code even where a building consent exemption applies. Sources: Building Performance.
Can RoofHub tell me whether my specific reroof is exempt?
RoofHub can explain the published rules but cannot determine the legal status of an unseen building. Use the government checker and confirm uncertain cases with your council or an appropriately qualified professional. Sources: New Zealand Government; Building Performance.
Sources and review notes
Prepared by RoofHub editorial team. Reviewed . A source check confirms what a page states, not an independent inspection or invoice audit. Published project accounts are attributed to their publishers.
- primaryBuilding Performance: 1.1 General repair, maintenance, and replacement - Schedule 1 guidance for repair and replacement. Comparable replacement in the same position can be exempt, but the exemption has important limits, including work on components that failed Building Code durability requirements. Page checked 2026-10-21. Publication date not stated. · government
- primaryBuilding Performance: Check if you need consents (2026-01-15) - MBIE Building Performance guidance. All NZ building work must comply with the Building Code; some low-risk work is exempt from consent, and owners should confirm uncertain cases with their council or an appropriate professional. Page checked 2026-10-21. Publication date shown above. · government
- primaryNew Zealand Government: Can I Build It? consent checker - Government decision-support tool based on Schedule 1 exemptions. Useful as a starting point for homeowners; uncertain or unusual work still needs confirmation from the relevant council or qualified professional. Page checked 2026-10-21. Publication date not stated. · government
- primaryBuilding Performance: Restricted building work (2026-01-15) - Explains restricted building work and the requirement for appropriately licensed practitioners where residential work is consented and affects primary structure or weathertightness. Page checked 2026-10-21. Publication date shown above. · government
- primaryBuilding Performance: Choosing a building practitioner (2026-09-09) - Current NZ guidance on finding, checking and comparing practitioners. Recommends references, multiple detailed quotes, written agreements, appropriate licensing and checking scope rather than headline price alone. Page checked 2026-10-21. Publication date shown above. · government
Original calculations are labelled as examples. Historical prices stay dated, missing fields stay unknown, and conflicting specifications are flagged. Sources are not endorsements or paid rankings. Read our methodology or report a correction.
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Start with approximate information, use actual measurements when you have them, or ask RoofHub to explain the decision. A roofing contractor still needs to confirm the site, specification and final quotation.