Summary of Kuna Ordinance 2026-05A (Apr 7, 2026) as it applies in Kuna.
Code evolves continuously. Verify at the official source before any development decision.
Applicable code
Code references active as of publication. Verify current standards at the official source before any development decision.
ADUs are limited to 900 square feet or 50% of the primary dwelling footprint, whichever is less.
Investor implication: Size cap is more restrictive than Boise's 70% rule but matches the 900 sqft absolute ceiling. Limits high-end ADU product; forces efficiency-focused design. Smaller footprint reduces construction cost but may compress rent ceiling on luxury-finish product.
Verify at City of Kuna Municipal Code →Owner-occupancy requirement for ADU construction removed.
Investor implication: Removal of owner-occupancy opens ADU construction to investor-owned rental portfolios. Out-of-state and institutional buyers can now add ADUs to Kuna SFH rental inventory without residency constraints.
Verify at City of Kuna Municipal Code →Parking requirement waived for ADUs within 1,500 feet of transit.
Investor implication: Parking waiver applies to most of Old Town Kuna's Avenue B-G grid. Eliminates the need for additional off-street parking on constrained urban lots. Reduces site-work cost and preserves yard space for outdoor amenity or future lot-split potential.
Verify at City of Kuna Municipal Code →Setback requirements for detached ADUs follow underlying zoning district standards. Alley-accessed parcels may qualify for reduced rear setbacks subject to Planning & Zoning approval.
Investor implication: Setback rules determine buildable envelope on constrained lots. Alley-accessed parcels may have reduced rear setbacks; verify per parcel before design. Specific setback distances vary by zoning district; confirm with Kuna Planning & Zoning at https://www.kunacity.id.gov/ before acquisition.
Verify at City of Kuna Municipal Code →Kuna Ordinance 2026-05A reformed ADU regulations: removed owner-occupancy, waived parking within 1,500 feet of transit, capped size at 900 sqft or 50% of primary.
Investor implication: April 2026 reform opened ADU construction to investor portfolios and reduced site-work cost on transit-proximate parcels. Investor workflow impact: Old Town Kuna parcels within the parking-waiver zone are now primary ADU targets.
Verify at City of Kuna Municipal Code →Renew analysis