There is no single process for setting up a shed.
There are however some useful resources that can help in deciding how;
- to go about setting up a shed,
- to establish a community group to manage a shed and
- getting charitable and IRD tax-free status.
Community Law http://www.communitylaw.org.nz/
Provides free legal advice, and includes guidance on establishing a community group choosing-the-right-legal-structure-for-your-group
and guidance on applying for charitable status charities-and-charitable-status