Kuna lot split guide

Lot splits offer the fastest path to creating buildable inventory in Kuna without triggering full subdivision platting. The three-lot cap means you can double or triple density on qualifying parcels with minimal entitlement risk, but you cannot create a four-lot subdivision through this process.

A standard 14,000 sq ft R-2 lot (70' × 200') can be split into two conforming 7,000 sq ft lots. Parcels smaller than 14,000 sq ft or with irregular dimensions may not qualify without a variance, which converts the lot split into a discretionary process and adds 60–90 days.

Infrastructure costs can exceed $50,000 per lot if you're splitting a parcel on an unimproved street or in an area without city sewer. Always confirm existing infrastructure status with Kuna Public Works before acquisition. Parcels in Old Town Kuna or established subdivisions typically have all utilities in place; parcels near the Area of Impact boundary often do not.

Flag lots allow you to split deep parcels without full street frontage on the rear lot, but the access strip must be at least 20 feet wide and cannot count toward the buildable area of either lot. This is common in Old Town Kuna where original platting created deep lots along Avenue B through G.

Easement placement directly affects buildable area and setback calculations. A 10-foot utility easement along the rear property line effectively increases the rear setback by 10 feet, reducing the buildable envelope. Always request a utility map from Kuna Public Works before finalizing lot split geometry.