Carpenter 331212 is Part B of the INZ list of skilled occupations, here.
http://www.immigration.govt.nz/opsmanual/35165.htm (If you look at the top of that list, there's a link that tells you the conditions for any job offer in NZ to count as skilled.)
Here's the ANZSCO description of what working as a carpenter entails.
https://www.acacia-au.com/anzsco/331212.php If you look near the bottom, it talks about the skill level and training, or experience, required. If you need to make the case for your existing work and qualifications making you a skilled worker, then you can compare what you have done with this list of requirements.