Davis County · about 33,000

Kaysville

Detached not in local code yet

Kaysville currently allows internal accessory dwellings only. The city’s published guidance says a detached structure — including an apartment over a garage — cannot be used as a dwelling. Senate Bill 284 changes that picture on qualifying lots beginning October 1, 2026.

Internal ADU

Permitted on lots of 6,000 sf or larger. Owner occupancy required. Long-term occupancy only (30 days or more).

Detached ADU

Not allowed under current Kaysville code. From October 1, 2026, a detached ADU must be a permitted use on lots of 11,000 sf or larger that already have a house. Confirm with planning whether the implementing ordinance is in place.

Lot

Internal: typically 6,000 sf or larger. Detached (from Oct 1, 2026): 11,000 sf or larger with a single-family house.

Size

Internal units have no state size cap. A future detached unit cannot exceed the primary dwelling.

Parking

One dedicated paved stall for the IADU, plus a two-car garage and a two-car driveway — among the stricter parking rules in the county.

Owner occupancy

The owner must occupy the IADU or the primary dwelling as their primary residence.

Rental

Long-term only (30 days or more).

Design

The house must keep its single-family appearance. Additions and remodels to create an IADU need a building permit.