If you are a UK citizen and/or passport holder, you can stay up to six months without a visa. If you are a citizen of a country that has a visa waiver agreement with NZ, you can stay up to three months without a visa. Otherwise, you’ll need a visitor visa, which allows you to stay for up to 9 months.
A working holiday visa allows you to travel and work in New Zealand for up to 12 months, or 23 months if you’re from the UK.