There have been significant changes in the building industry recently with the introduction of the Licensed Building Practitioner scheme into New Zealand law.
This restricts what work can and can't be done by people who do not hold the appropriate license.
Information on how this affects you is constantly being developed and as this becomes available we will continue to keep you up to date on what effects this will have for you - both as a DIYer and as a homeowner looking to outsource this work.
If you have concerns about this - talk to your local store. They can help advise you - whether it is on what work you can undertake yourself or finding the right contractor for the job.