Four state districts sit above county zoning
HRS chapter 205, adopted in 1961, classifies every parcel in the state into one of four districts. Counties administer the Urban district. The Land Use Commission and the counties share the Rural district, which contemplates lots of not more than one dwelling per half acre and small farms. The Agricultural district is governed by HRS § 205-4.5, which enumerates permitted uses. Conservation is administered by the Board of Land and Natural Resources through DLNR's Office of Conservation and Coastal Lands, and it is the hardest classification to build in. Changing a boundary on more than 15 acres, or on any conservation land, is a Commission petition; 15 acres or less outside conservation goes to the county.