Davis County, UT Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- R-1 minimum lot
- 9,000 sq ft
- R-1 lot width
- 75 feet
- Lot-coverage percent
- None specified (R-1)
- Internal ADU
- Permitted by state law
- ADU lot-size limit
- Cities may bar 6,000 sq ft or less
Summary
Davis County's residential zones control density through minimum lot size and yard setbacks rather than a fixed lot-coverage percentage. R-1 requires a 9,000-square-foot lot with 25-foot front/rear and 8-foot side yards. Utah law also bars cities from restricting internal ADUs by total lot size.
In any area zoned primarily for residential use: (a) the use of an internal accessory dwelling unit is a permitted use; (b) ... a municipality may not establish any restrictions or requirements for the construction or use of one internal accessory dwelling unit within a primary dwelling, including ... total lot size.
Full Breakdown
The Davis County zoning ordinance (Title 15.20) does not impose a single maximum lot-coverage percentage for R-1. Instead, buildable area is governed by the minimum 9,000-square-foot lot, 75-foot lot width, and the 25/8/25-foot yard setbacks; larger agricultural zones require half-acre to 40-acre lots. Separately, Utah state law (Sec. 10-9a-530) requires cities to allow one internal accessory dwelling unit as a permitted use in residential zones and forbids restricting it based on total lot size, street frontage, or size relative to the main home, though a municipality may still bar internal ADUs on lots 6,000 square feet or smaller.
Violations & Fines
Building beyond allowed yards or lot standards is a zoning violation. Internal-ADU violations under state law can draw liens up to $100 per day after the owner's cure period expires.
Frequently Asked Questions
Does Davis County limit how much of my lot I can cover?
Can my city block an internal ADU because my lot is small?
Sources & Official References
Other rules in Davis County
Compare Davis County to another location·View the Utah building setbacks & zoning overview
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