Park model tiny homes in Jefferson County, Idaho

What Jefferson County allows

Jefferson County's accessory dwelling unit ordinance was adopted to expand affordable housing options while making efficient use of existing infrastructure. A certified tiny home on wheels can qualify as an ADU under this section, confirmed directly with the department, subject to the standards below.

• One accessory dwelling unit is allowed per lot or parcel, where permitted by the zone district
• The ADU may be the first residence on the property
• Maximum 1,200 square feet of gross floor living area
• Maximum two bedrooms
• Must share an access or driveway with the primary dwelling
• Must have a separate outside entrance
• Requires a building permit and must meet the building code as it applies to residential uses

How the process generally works

1. Confirm your lot with the countyCall Jefferson County Planning, Zoning & Building to confirm your parcel's zoning district and that an ADU is permitted there.
2. Choose a certified modelEvery Snake River Tiny Homes model already carries NOAH+ certification, built to hold up in eastern Idaho winters through our Extreme Weather Package.
3. Submit for accessory dwelling unit approvalThe county reviews the placement against Section 112-371's standards: size, bedroom count, shared access, and a separate entrance.
4. Meet setback and entrance requirementsConfirm your unit's placement satisfies standard residential setbacks and has its own outside entrance, separate from the primary home.
5. Finalize placementComplete your building permit and utility connections before final placement.

Source and verification

This page is based on Jefferson County Code of Ordinances, Chapter 112, Section 112-371 (Accessory Dwelling Units), and direct confirmation from Milton Ollerton, Administrator of Jefferson County Planning, Zoning and Building, that a certified tiny home on wheels qualifies as an accessory dwelling unit.

Read Jefferson County's ADU ordinance

Last verified by Snake River Tiny Homes: September 1, 2026

This page is provided for general information and is not legal advice. Zoning rules change and individual parcels vary. Buyers should confirm current requirements directly with Jefferson County Planning, Zoning and Building before purchase.