A good feasibility model doesn’t need to be complex—it needs to be realistic. In New Zealand, the biggest feasibility mistakes usually come from timing (holding costs), missing council charges (especially Development Contributions), and tax/GST assumptions that don’t match your strategy. This guide gives you a simple, lender-friendly feasibility structure you can use for small subdivisions, infill builds, or renovation-for-resale projects—plus practical notes for Hamilton and Waikato conditions