Do I need a building permit
in Farmington, UT?

Do I need a permit in Farmington, Utah?

What's specific to Farmington permits

Farmington's location on the Wasatch Fault means seismic design is a real conversation with the building department, not a checkbox. If your project involves a foundation — a deck, addition, foundation repair, or any ground-contact work — expect the plan reviewer to ask about soil boring data or at least a soil report. The city doesn't always require it for a 12×16 deck, but they will for larger additions or if you're building in a part of town where the Fault runs near the surface. Lake Bonneville sediments and expansive clay in the soil add another layer: clay-rich soils can shift in freeze-thaw cycles, which is why Farmington's frost depth (30 to 48 inches depending on elevation and drainage) is the hard rule for deck footings and foundation work. Don't guess at frost depth — call the city and tell them your address; they can tell you the specific depth requirement for your location.

Farmington adopted the 2024 IBC with Utah state amendments. The state module includes specific language on wildfire mitigation, seismic detailing, and radon testing that may differ from other western states. For most homeowners, the practical takeaway is: frost-depth calculations are non-negotiable, electrical work must be done by a licensed electrician or the homeowner pulling their own permit, and any foundation work needs to reference the seismic design map. The city's plan-review team is familiar with owner-builder submissions and won't reject you for not having a contractor, but they will reject plans that don't call out frost depth, footing size, or seismic anchoring when required.

The Farmington permit portal — check with City Hall for the current URL and login process — allows you to submit applications online, track status, and sometimes schedule inspections without a second trip to the counter. Not all project types are available online (complex additions might require in-person narrative), but deck permits, fence permits, and smaller jobs often are. If you go in person, Farmington's Building Department staff are straightforward and will tell you on the spot if your application is incomplete. Bring a site plan with property lines and setback dimensions; bring an elevation or plot plan if the project is a deck or addition. No site plan? They'll ask you to go home and draw one. Come back when it's done.

One quirk specific to Farmington: the city is in an area where residential solar installations have grown. If you're thinking about roof-mount or ground-mount solar, know that the city requires a separate electrical permit and the system must be designed by a licensed engineer or installer. This is standard statewide, but Farmington's plan reviewers have seen enough solar installs to know when the electrical design is incomplete. Don't try to wing the electrical detail; file the solar structural permit, then file the electrical subpermit, and make sure both are signed off before energizing. The structural and electrical inspections happen separately, and the city won't close out your permit until both pass.

Farmington has relatively loose zoning restrictions for backyard structures — sheds, playhouses, detached garages under 1,000 square feet are often allowed by right in residential zones — but they still need permits if they're over 200 square feet or have electrical/plumbing. The most common permit mistake in Farmington is the homeowner thinking a storage shed or accessory building doesn't need one because 'it's not a house.' It does. The flip side: small detached sheds under 200 square feet with no utilities can sometimes go without a permit, but call the city first. The setback from property lines is typically 5 feet for accessory buildings, but it can vary by zone, so confirm before framing.

Most common Farmington permit projects

These are the projects that bring homeowners to the Farmington Building Department most often. Each one has specific local wrinkles — frost depth for decks, setback rules for additions, electrical licensing for renovations. Click through for the details.

Utah context for Farmington permits

Utah allows owner-builders to pull permits for work on their own owner-occupied homes, which is one of the most homeowner-friendly rules in the region. You don't need to hire a contractor or have a contractor's license to file a permit, design plans, and oversee construction on your own house. That said, some trades are still licensed: electrical work requires a licensed electrician unless you qualify as an owner-builder; plumbing work also often requires licensing depending on the scope. The State of Utah Building Commission oversees code adoption, and Farmington enforces the 2024 IBC plus Utah amendments. The state includes seismic design provisions that reflect Utah's earthquake risk (including the Wasatch Fault), radon testing requirements in certain counties, and wildfire mitigation standards in the wildland-urban interface. Farmington sits in Davis County, which is not a mandatory radon-testing county at the state level, but radon is still a concern in parts of the Wasatch Front — the city's plan reviewer can advise. Frost depth in Utah varies significantly by elevation and location; Farmington's range of 30 to 48 inches reflects the transition from the valley floor to the foothills. The city will give you the specific depth for your address when you call.

Common questions