Most building work will require a Building Consent. The Building Act 2004 requires that building consents be granted for any temporary or permanent moveable or immovable structure (including a structure intended for occupation by people, animals, machinery or chattels) and includes mechanical, electrical and other systems, certain fences, vehicles that are immovable and occupied by people on a permanent or long term basis, mast poles and telecommunication aerials that exceed certain height and width criteria and the demolition of existing buildings.
Building Consents are also required for some maintenance work particularly where maintenance involves building components that have not been able to meet the durability requirements of the New Zealand Building Code. Certain work is exempt from the need to be subject to a building consent; more information concerning these exemptions can be found in the First Schedule to the Building Act.
All the information you need to make your decision is available at https://www.building.govt.nz/buildit
