Cities · Davis & Weber
Every city over 5,000, and what it asks of an ADU.
Fifteen cities in Davis County and twelve in Weber County. Open a city for lot size, parking, occupancy, and how a new detached building is permitted now that the October 1, 2026 statewide rule is in effect.
State law · 2021
Internal units
House Bill 82 (2021) makes an internal accessory dwelling a permitted use in most residential zones. Cities may still require owner occupancy, one extra parking stall, a 6,000 sf minimum lot, and a ban on stays under 30 days.
State law · in effect
Detached units
Senate Bill 284, Utah Code §10-21-304, has been in effect since October 1, 2026. Every city on this list must allow a detached ADU as a permitted use — not a conditional use — on a lot of 11,000 square feet or larger that already has a permitted single-family house. A city may also allow one on a smaller lot. It may still set size, height, coverage, setbacks, and owner occupancy, and it may require that the unit not be larger than the house, not sit in the front yard, and not be rented for fewer than 90 days. Parking may not exceed one stall under 650 square feet, or two stalls at 650 square feet and above. A printed ban, or a conditional-use requirement, on a qualifying lot conflicts with the statute even if the code book is late. Confirm the city’s ordinance before anyone draws.
Davis County
15 cities over 5,000 residents
- Laytonabout 84,000Detached allowed in single-family zones
- Bountifulabout 45,000Confirm the September text
- Syracuseabout 39,000Detached allowed
- Clearfieldabout 35,000Detached allowed (2025 ordinance)
- Kaysvilleabout 33,000Detached permitted on 11,000 sf lots
- Farmingtonabout 26,000Detached allowed on larger lots
- Clintonabout 24,000Detached allowed
- North Salt Lakeabout 24,000Detached allowed
- Centervilleabout 17,000Detached permitted on 8,500 sf lots
- West Pointabout 13,000Detached allowed on 10,000 sf lots
- Woods Crossabout 11,500Ordinance 645 posted as adopted
- South Weberabout 8,200Confirm detached with the city
- Fruit Heightsabout 6,100October 6 text, confirm the minutes
- West Bountifulabout 6,000Detached permitted on 11,000 sf lots
- Sunsetabout 5,500Confirm detached with the city
Weber County
12 cities over 5,000 residents
- Ogdenabout 89,000Detached allowed, tightly sized
- Royabout 39,000Confirm detached with the city
- West Havenabout 25,000Detached allowed with a land-use permit
- North Ogdenabout 23,000Confirm detached with the city
- South Ogdenabout 18,000Detached allowed
- Pleasant Viewabout 11,200Detached permitted over 11,000 sf
- Hooperabout 9,300Confirm detached with the city
- Riverdaleabout 9,200Confirm detached with the city
- Washington Terraceabout 9,100Detached permitted on 11,000 sf lots
- Plain Cityabout 8,100Confirm detached with the city
- Farr Westabout 8,000Detached allowed
- Harrisvilleabout 7,000Confirm detached with the city
Outside a city
Unincorporated lots
Weber County lots outside a city limit follow the county ordinance: detached units from a 400 sf footprint up to 1,500 sf (2,000 sf floor area), owner occupancy, and a design that matches the house — or is drawn by a licensed architect in a barn, agricultural, or local-historic style.
Unincorporated Davis County lots are few. Davis County CED in Farmington is the counter.
Populations are recent Census estimates, rounded. Codes move. These pages are a starting point, not a substitute for the ordinance that applies to your parcel.
Ask about your lot