Accessory Dwelling Units

This local guide explains property owner options for developing accessory dwelling units (ADUs) in Oahu County, Hawaii. It begins with an introduction to the concept of ADUs, a process diagram, and a history of ADUs in Hawaii before discussing project scoping, design, permitting and construction, and being an ADU landlord. The appendices include local regulations, sample paperwork, checklists, materials lists, and references for additional information.