Quick answer: Finishing a basement in Davis County means working with whichever building department covers your address. Layton, Farmington, Clearfield, Kaysville, Bountiful, Syracuse and the other cities each run their own permit office, and Davis County itself handles only unincorporated land. Plan for a permit, plan review and several inspections. Before the walls close, test for radon, check your lot for shallow groundwater, and decide whether the space should be able to work as a legal internal accessory dwelling unit (ADU) under Utah law.
Looking for a contractor? This guide covers permits and planning. If you’re ready to finish your basement, see our basement finishing in Davis County service page or request a free estimate.
Key takeaways
- Davis County has no single permit desk for basements. Your city’s building division issues the permit, and Davis County Community and Economic Development covers only properties outside city limits.
- Layton, Farmington and Clearfield all publish online application portals and residential checklists. Layton and Farmington also post basement-specific handouts.
- Utah DEQ reports that about 1 in 3 Utah homes has elevated radon. Test before you finish, because a finished basement is usually the lowest lived-in level.
- The Utah Geological Survey warns that shallow groundwater can flood basements. Lots in lower-lying parts of the county deserve a closer look before you install carpet and drywall.
- Utah’s internal ADU law, passed as HB 82 in 2021, makes a basement apartment inside an owner-occupied single-family home a permitted use in most residential zones. Cities can still add some conditions.
- Families tied to Hill Air Force Base often plan basements that can switch between extra family space and a long-term rental if orders change.
Why Davis County is a patchwork of permit offices
Davis County is narrow and packed with cities, so a short drive can take you through three building jurisdictions. Basement codes are broadly similar because each city enforces the state-adopted International Residential Code. What changes from city to city is the paperwork: how you apply, which checklist you follow, what the fees are and how inspections get scheduled. Start by confirming which office covers your address.
How the main city offices handle basement finishes
| Jurisdiction | What their official page shows (as of October 2026) |
|---|---|
| Layton | The Layton Building Division posts a Basement Finish/Remodel Handout and a separate Basement Finish Plan Submittal Checklist. You apply, upload plans, track status and request inspections through an online permit portal. The office is at 437 N Wasatch Dr, phone (801) 336-3760. |
| Farmington | Farmington’s Building Applications and Forms page lists a Residential Building Permit Application Packet, a Basement Finish PDF and an online portal. The city asks for complete applications with all required plans. The Building Department line is 801-939-9214. |
| Clearfield | The Clearfield Community Development page says most repairs and alterations require a permit and links to a Residential Application Checklist and an online application. Questions go to 801-525-2701. |
| Unincorporated Davis County | Davis County building permits apply only to properties outside city limits, and the county’s jurisdiction map shows which side of the line you are on. The FAQ lists basement finishes as work that requires a permit and gives a minimum fee of $202. Inspections are handled through a contracted inspection firm. |
| Kaysville, Syracuse, Bountiful, Centerville and others | Each city runs its own building department. Call the city office or check its website before you draw plans, and see our city guides below for local detail. |
One practical point: Davis County’s page says that when the county cannot inspect within three business days, inspections may be handed to neighboring city inspectors, including Farmington, Kaysville and Syracuse. If you live in an unincorporated pocket, ask about timing up front so your drywall crew isn’t sitting idle.
What a typical Davis County basement permit involves
Requirements vary, but most basement permits follow the same sequence:
- Plans and application. You need a floor plan showing room uses, egress windows, smoke and carbon monoxide alarm locations, insulation, and the furnace and water heater area. Layton and Farmington both post checklists, so use the one for your city.
- Plan review. The city checks bedroom egress, ceiling heights, stair geometry and fire separation before it issues the permit.
- Rough inspections. Framing, electrical, plumbing and mechanical are inspected while the walls are still open.
- Insulation inspection, where the city requires one, before drywall.
- Final inspection. The city confirms alarms, egress, finishes and safety items before you use the space.
Site conditions to check before you finish
Davis County stretches from the Wasatch foothills west to the shores of the Great Salt Lake. Homes on the benches and homes on the lower flats sit on different ground, and that affects what should happen before a finished basement is sealed up.
Shallow groundwater
The Utah Geological Survey’s flooding hazards page lists shallow groundwater as a hazard that can flood basements, damage buried utility lines and destabilize excavations. The UGS also asks homeowners to report basement flooding they suspect is groundwater-related, because those reports feed future hazard mapping. That page links to the Utah Geologic Hazards Portal, where you can look up mapped hazards near your address.
Before finishing, look for:
- Efflorescence (white, chalky deposits) or water lines on foundation walls
- Damp or darkened spots on the slab after spring snowmelt or heavy irrigation
- A sump pit that runs often, or neighbors who have one
- Exterior grading that slopes toward the house, or downspouts that dump next to the foundation
If you find any of these, solve the moisture problem first. Drainage, grading and waterproofing fixes are far easier before the walls are finished.
Radon
The Utah DEQ radon program states that 1 in 3 Utah homes has elevated radon. It uses the EPA’s 4 pCi/L level as the point to consider mitigation. DEQ also publishes radon test results by ZIP code, which gives you a sense of your area, but only a test of your own home tells you what you have. Radon enters through slab cracks, floor-wall joints and plumbing penetrations, and an unfinished basement makes it easy to see and seal those openings and route a mitigation pipe. Test first. If results are high, install the system before framing so the pipe can run through a closet or utility chase rather than across a finished room. Follow DEQ’s instructions so the test result is valid.
Utah’s internal ADU law and what it means in Davis County
Many Davis County homeowners finish a basement with a future rental in mind. Utah’s 2021 HB 82, Single-Family Housing Modifications, added Utah Code 10-9a-530. That section made an internal ADU a permitted use in areas zoned primarily for residential use. An internal ADU is an apartment created inside an owner-occupied, detached single-family home, within its existing footprint, for long-term rental. A finished basement is the most common example.
According to the enrolled text of HB 82, the law in its original form:
- Required the unit to meet building, health and fire codes
- Barred cities from regulating the unit’s size relative to the house, total lot size or street frontage, except in the specific ways the statute allows
- Let cities require one additional on-site parking space, a design that keeps the home looking like a single-family dwelling, and a rental permit or license
- Let cities prohibit internal ADUs on lots of 6,000 square feet or less, in homes that are not the owner’s primary residence, and for rentals shorter than 30 consecutive days
- Let cities prohibit a separate utility meter, and let them exclude internal ADUs from one zoning district covering 25% or less of their residentially zoned area
- Allowed a city to record a notice on the property and, after notice and a cure period, place a lien of up to $100 per day for violations
The legislature has amended this area of law since 2021, and each city writes its own implementing ordinance. Before you design a basement apartment, ask your city planning office about parking, rental licensing, owner-occupancy rules and lot size. Our ADU services page covers how we approach these projects.
Designing an ADU-ready basement
Even if you don’t plan to rent right away, a few choices made during the finish keep that option open:
- A separate entrance, such as an exterior stair or walkout door, where grading allows
- Bedroom egress windows sized and placed to code from the start
- A plumbing rough-in for a kitchenette and laundry
- Sound insulation in the ceiling and a solid-core door at the stair
- HVAC zoning or a dedicated system, so a tenant’s comfort doesn’t depend on your thermostat
Planning a basement around Hill Air Force Base life
For households connected to Hill Air Force Base, whether active-duty members, civilian employees or contractors, a basement often has to serve more than one purpose. These families tend to plan around the chance of a move, and the most useful basements can change roles without another remodel.
- Flexible bedrooms. A legal egress bedroom with a nearby bathroom works for kids, visiting relatives or a future tenant.
- A home office that meets code. Remote and hybrid work is common, and a properly wired, ventilated office adds daily value.
- Rental readiness. Because Utah’s internal ADU rules center on long-term rentals of 30 days or more, a basement unit can suit renters who want a lease of several months or longer. Confirm the rental license and owner-occupancy requirements first.
- Resale appeal. A permitted finish with final inspection records is easier to sell than unpermitted space. Keep your inspection records with your home documents.
City-by-city guides for Davis County basements
This page is the county overview. For city-specific detail, use these guides:
- Basement remodeling in Layton, including how Layton’s basement handout and checklist work
- Basement finishing in Kaysville
- Basement finishing in Syracuse, Lift Construction’s home city on the west side
- Basement finishing in Clearfield
- Basement remodeling in Farmington, the county seat
- Basement remodeling in Centerville
- Basement remodeling in Bountiful
Frequently asked questions
Do I need a permit to finish a basement in Davis County, Utah?
Yes. Layton, Farmington and Clearfield all list residential remodel or basement permit requirements, and Davis County’s own FAQ names basement finishes as permit-required work for unincorporated properties. Apply with the city that covers your address, or with the county if you live outside city limits.
How do I know whether my home is under a city or Davis County for permits?
Davis County publishes a jurisdiction map on its building permits page. Shaded areas fall under the cities, and unshaded properties fall under the county. Most Davis County homes are inside a city, so the city building division is usually the office you will work with.
Can I rent out my Davis County basement as an apartment?
Often, yes. Utah’s 2021 HB 82 made internal ADUs a permitted use in most residential zones for owner-occupied single-family homes. Cities may still require a rental license and an extra parking space, ban rentals under 30 days, and exclude lots of 6,000 square feet or less. Check your city’s current ordinance before you build.
Is radon a real concern for Davis County basements?
Yes. Utah DEQ reports that 1 in 3 Utah homes has elevated radon and recommends considering mitigation at 4 pCi/L or higher. Since a finished basement is usually the lowest lived-in level, test before you finish and install any mitigation system before framing.
How can I tell whether shallow groundwater affects my lot?
Start with the Utah Geologic Hazards Portal linked from the Utah Geological Survey’s flooding page. Then check your foundation for efflorescence, damp slab areas and sump activity, especially after spring runoff. If you see signs of water, fix drainage and waterproofing before you finish the space.
Who inspects basements in unincorporated Davis County?
Davis County uses a contracted inspection firm and asks for at least 24 hours’ notice. When it cannot inspect within three business days, inspections may go to neighboring city inspectors such as Farmington, Kaysville or Syracuse, but you must notify the county first.
Plan your Davis County basement with Lift Construction
Lift Construction is based in Syracuse and finishes basements throughout Davis County. Owner and general contractor David Carter’s team handles plans, permits and inspections with your city’s building department. See our Davis County basement finishing services, then contact us or call 801-683-6803 to talk through your basement.
Written by the Lift Construction team, led by owner and general contractor David Carter. Code and program details were checked against the official sources linked above as of October 2026 — always confirm current requirements with your city before you build.