ID · State directory
Idaho ADU rules
Official accessory dwelling unit regulations for 14 jurisdictions in Idaho, plus statewide law.
Not sure which city yet?
We have read the ordinances for 14 Idaho cities and lined them up side by side: detached vs internal, size limits, owner occupancy, and approval process.
Statewide ADU law
Idaho has state-level ADU legislation that applies across local jurisdictions. Local rules below may add requirements on top of state law.
Cities
Boise4 sources · verified August 2026Caldwell5 sources · verified August 2026Coeur D’Alene6 sources · verified August 2026Idaho Falls4 sources · verified August 2026Ketchum4 sources · verified August 2026Lewiston5 sources · verified August 2026McCall6 sources · verified August 2026Meridian3 sources · verified August 2026Moscow4 sources · verified August 2026Nampa4 sources · verified August 2026Pocatello4 sources · verified August 2026Post Falls4 sources · verified August 2026Twin Falls3 sources · verified August 2026
Counties & regions
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