If you are considering building or plumbing work, you need to talk to Council to see whether a building consent is required or not.
Work that does require a building consent is set out by the Building Act 2004 (Schedule 1). Although your particular project may be exempt from the need for a building consent, the work must still satisfy the provisions of the Building Code.
Basic building jobs, such as laying a patio or installing kitchen cupboards, do not require a building consent.
The Schedule 1 Guidance document will help you find out if your planned work needs a consent.
Restricted Building Work & Licensing
On 1 March 2012, Restricted Building Work and Licensing came into effect. Building practitioners need to demonstrate their ability to meet industry competencies in order to obtain the status of a Licensed Building Practitioner (LBP).
Restricted Building Work (RBW) is work which is critical to the integrity of a building and can only be carried out or supervised by a Licensed Building Practitioner (LBP).
There are a number of guides available to help you plan and better understand restricted building work.