There are various routes available to you should any issues happen with your build. Often the most successful way is to resolve it yourself through communicating with the people involved.
A good place to check your rights is to check the details of your contract – which should have clauses covering problem resolution process.
There are also consumer protection options available through the Building Act, Construction Contracts Act, Consumer Guarantees Act and Fair Trading Act.
You can also use third parties to help resolve issues through mediation, arbitration and adjudication. This could include taking a dispute through the Disputes Tribunal or courts.