Environmental Rules in Davis County, UT (2026)
5 rules for unincorporated Davis County, Utah.
Verified from official government sources
Stormwater Management
Unincorporated Davis County requires a development permit before recording any subdivision plat, and a construction permit before any building work begins, inside a critical flood area: land within 100 feet of a designated creek, canal or drainage channel unless the official flood control map sets a different boundary. Both permits come from the Flood Control Department.
Storm Drainage Permits in Davis County
Some RestrictionsDavis County Code §§ 12.04.020, 12.04.030
Before any subdivision plat which contains property located within the critical flood area is recorded, a development permit shall be obtained from Davis County. As defined in this section "critical flood area" is the area designated on the official flood control base map, or where no area is defined on the official flood control base map, it is the area within one hundred (100) feet of any of ...
Erosion Control
Anyone disturbing one acre or more of ground in unincorporated Davis County must obtain a General Construction County Storm Water Permit from the Public Works Department and get a Storm Water Pollution Prevention Plan approved before breaking ground. The county also requires a companion state permit, a review fee scaled to acreage, and a performance bond, and separately bans tracking mud onto public streets.
Construction Site Erosion Control in Davis County
Significant RestrictionsDavis County Code § 14.24.080
Any person or business responsible for disturbing one acre or more of ground shall obtain a General Construction County Storm Water Permit from the Public Works Department. No person shall be granted a General Construction County Storm Water Permit for land-disturbing activity that would require the uncovering of 1 acre or more without the approval of a Storm Water Pollution Prevention Plan by ...
Flood Zones
Building, filling or developing anywhere in a Davis County FEMA special flood hazard area requires a development permit from the County Zoning Administrator before work begins, on top of any other building permit. New construction must be anchored against flotation, built with flood-resistant materials, and kept free of enclosed space below the base flood elevation, and violating the article is a Class B misdemeanor.
Floodplain Development Permits in Davis County
Significant RestrictionsDavis County Code §§ 14.04.320, 14.04.400
Establishment of Development Permit. A development permit shall be obtained before construction or development begins within any area of special flood hazard established in Section 14.04.310(B). Application for a development permit shall be made on forms furnished by the County Zoning Administrator... No structure or land shall hereafter be located, extended, converted or altered unless in full...
Vehicle Idling Restrictions
Davis County caps engine idling at two minutes for any motor vehicle, under the county's vehicle emissions program. Section 10.12.060(L) exempts traffic queues, refrigerated cargo units, sleeper-cab climate control, emergency vehicles and situations necessary to protect a driver's or passenger's health and safety.
Vehicle Idling Time Limit in Davis County
Some RestrictionsDavis County Code § 10.12.060(L)
No owner or operator of a motor vehicle shall allow a vehicle's engine to remain idling for longer than two minutes, unless otherwise exempted. A motor may be exempted from the idling limitations requirement of Section 10.12.060(L) under the following conditions: Traffic for which vehicle a driver has no control, including, but not limited to: stopped in a line of traffic, stopped at a railroad...
Flood Elevation Requirements
In Davis County's unincorporated special flood hazard areas, new residential construction and substantial improvements must have the lowest floor, including the basement, elevated to or above the base flood elevation plus any adopted freeboard, certified by a licensed engineer, architect, or surveyor. Commercial and industrial buildings may floodproof instead of elevating, and a development permit is required before work begins.
Base Flood Elevation Rule in Davis County, Utah
Some RestrictionsDavis County Code § 14.04.340(A)-(B)
New construction and substantial improvement of any residential structure shall have the lowest floor, including basement, elevated to or above base flood elevation plus any adopted freeboard. A licensed professional engineer, architect, or land surveyor shall submit a certification to the Zoning Administrator that the standard of this subsection is satisfied. ... New construction and substanti...
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