Washington County, UT Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- C-1 lot coverage cap
- 60%, § 10-10-3
- C-2 lot coverage cap
- 60%
- C-3 lot coverage cap
- 50%
- PDC lot coverage
- 'TBD', set per development agreement
- MFG/IND lot coverage cap
- 60% flat, § 10-11-3
- Pine Valley Overlay residential cap
- 50% building, 15%/10% accessory
Summary
Washington County's commercial zones cap building footprint at a fixed share of the lot: County Code § 10-10-3 sets Maximum Lot Coverage at 60% in the C-1 and C-2 zones and 50% in C-3, with PDC left "TBD" for case-by-case review. The Manufacturing and Industrial zones share a flat 60% cap under § 10-11-3.
Min/ Maximum Height 8'/35' 8'/40' 8'/40' 8'/40' Maximum Structure Area 15,000 sf TBD TBD TBD Maximum Lot Coverage 60% 60% 50% TBD Street Frontage Requirement 100 feet 140 feet 140 feet 140 feet ... MFG IND Maximum Area of All Buildings and Structures 60% 60% Maximum Lot Coverage 60% 60%
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-17: Code current through: Ord. 2026-1329-O, passed 8-18-2026).
Full Breakdown
Section 10-10-3's Area, Setback and Height Requirements table for the C-1, C-2, C-3, and PDC commercial zones lists "Maximum Lot Coverage" at "60%" for C-1, "60%" for C-2, "50%" for C-3, and "TBD" for the PDC Planned Development Commercial zone, meaning PDC coverage is set individually through that zone's development agreement rather than a fixed county-wide number. The same table pairs coverage with a maximum structure area of 15,000 square feet in C-1, also "TBD" in C-2 and C-3, a minimum street frontage of 100 to 140 feet depending on zone, and a height cap of 8 feet minimum up to 35 or 40 feet maximum.
5, RA-5, RE-20, and RE-40 districts, plus a separate 15%-of-lot-area cap on detached accessory structures built within the principal structure's setbacks, or 10% if built elsewhere on the lot, with barns allowed up to 25% coverage outside agricultural districts.
Violations & Fines
Exceeding the applicable Maximum Lot Coverage percentage is a Title 10 zoning violation regardless of zone. Section 10-1-10 bars the building inspector from issuing a permit for construction that would violate the title, § 10-1-18 allows a stop-work "red tag" once an over-coverage structure is discovered mid-build, and § 10-1-11 lets the county attorney sue to compel removal of the noncompliant portion as a public nuisance.
Frequently Asked Questions
What is the maximum lot coverage for a commercial building in Washington County?
Is the lot coverage limit the same in industrial zones as commercial zones?
Does Washington County limit lot coverage for houses?
Sources & Official References
Other rules in Washington County
Compare Washington County to another location·View the Utah building setbacks & zoning overview
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