Weber County · about 9,200

Riverdale

Confirm detached with the city

Internal accessory dwellings follow state law. Detached standards should be confirmed with Riverdale planning. The October 2026 statewide floor applies to 11,000 sf lots.

Internal ADU

Permitted in most residential zones under House Bill 82.

Detached ADU

Confirm with the city. From October 1, 2026, lots of 11,000 sf or larger with a house must be able to take a detached ADU as a permitted use.

Lot

Confirm. Many Riverdale lots are tighter than 11,000 sf — feasibility is whether the building fits, not only whether the code allows it.

Size

Per ordinance. The ADU cannot exceed the primary dwelling under the 2026 state floor.

Parking

Per ordinance, subject to the 2026 state cap.

Owner occupancy

Owner occupancy is typical. Confirm.

Rental

Long-term occupancy is the usual rule.

Design

Setbacks, height, and coverage remain local.