Restricted building work must be done or supervised by a Licensed Building Practitioner (LBP). Find out when you can do restricted building work yourself.
Restricted building work is design or construction work that is structural or affects the weathertightness of the house. It covers elements such as:
- external moisture-management systems
- active fire safety systems (in small to medium-sized apartments).
LBPs are professionals approved by us who are qualified (and have licences) to carry out restricted building work. They include:
- bricklayers and blocklayers
- external plasterers
- site and foundations specialists.
Chartered professional engineers aren’t LBPs, but they are licensed to supervise and undertake restricted building work.
When you apply for a building consent you’ll need to include a Memorandum (Certificate of Design Work) (PDF 173 kb) from an LBP, architect or engineer. This identifies all the restricted building work that needs to be done and those who’ll be doing or supervising the work – if they are known.
If you don’t know them, it’s your responsibility as the homeowner to check – before you start the work – that the people you’re using to supervise or do restricted building work have the relevant licences.
When you can do restricted building work yourself
If you’re an owner-builder (a DIYer), you might be able do restricted building work on your own home – including with help from friends and family.
However, you must first get an ‘owner-builder exemption’ and complete a statutory declaration. Find out more about obligations and responsibilities of owner-builders. Note that future buyers of your house will be able to find out about the work you’ve done.