Bill > S1353

This bill establishes new regulations for twin homes and duplexes in Idaho cities with a population over 5,000, aiming to increase housing options by preventing cities from banning these types of residences in areas zoned for single-family homes. A "twin home" is defined as a building with two separate living units that share a wall but are independently owned and maintained. By October 1, 2026, cities must update their land use plans and regulations to allow twin homes and duplexes on lots where single-family homes are permitted, without imposing minimum lot sizes that would effectively prohibit them, requiring more than one parking space per unit, or charging higher impact or utility connection fees than for single-family dwellings. Projects meeting these requirements will be approved administratively, meaning they will be approved as a matter of right without needing special discretionary approval, similar to single-family homes. Any approval standards must be clear, objective, and not create unreasonable costs or delays, and should not be more restrictive than those for single-family homes. The bill also includes a severability clause, meaning if any part of the law is found invalid, the rest will remain in effect, and it declares an emergency, making the law effective on July 1, 2026.

Budget and Finance, Justice

State Affairs Committee (Senate)

https://legislature.idaho.gov/sessioninfo/2026/legislation/S1353/