Below-grade space in the desert
Basements are less common in St. George than in northern Utah, but many newer homes and hillside lots include below-grade rooms. Two local facts shape any project. Utah's Department of Environmental Quality says about 1 in 3 Utah homes tested, and 1 in 2 in some areas, have radon above 4 picocuries per liter. And the Utah Geological Survey says collapsible soils are common in the St. George–Hurricane area; they can settle up to 10 percent of the deposit's thickness when they get wet.
Step 1: Radon test
Utah DEQ says radon can only be detected by testing, and the average in tested Utah homes was 5.3. Test the lowest level before finishing. If mitigation is needed, install it before walls are closed.
Step 2: Keep water away from the foundation
Because collapsible soils settle when wet, water management matters more here than in many places:
- keep irrigation and sprinklers away from foundation walls;
- extend downspouts well away from the house;
- make sure soil slopes away from the foundation;
- fix leaking pipes promptly.
Watch for new cracks or doors that start to stick, which can be early signs of settlement.
Step 3: Permit costs
The City of St. George's building fee sheet uses the 1997 Uniform Building Code fee scale: $181.25 for a $10,000 valuation, $321.25 for $20,000, $442.25 for $30,000 and $643.75 for $50,000, with a minimum building permit of $60.60. Ask whether the quote includes the permit and any plan check.
Step 4: Who may do the work
Utah law exempts alteration, repair and remodeling work with a contracted value under $7,000 from contractor licensing, but even on those jobs, work on a plumbing or electrical system must be done by a contractor holding a Utah license. A basement finish usually exceeds the exemption, so the general contractor needs a license too.
Step 5: The order of work
1. Water management and any foundation evaluation. 2. Radon test and mitigation. 3. Design, including egress for bedrooms. 4. Permits. 5. Framing, rough electrical, plumbing and HVAC. 6. Inspections. 7. Insulation, drywall and finishes. 8. Final inspection.
Comparing quotes
Ask for line items: framing, insulation, electrical, plumbing, HVAC, drywall, flooring, egress windows, permits and cleanup.
Records
Keep the radon test, permits, inspections and warranties together.
Light and egress
Below-grade rooms on hillside lots often have one wall partly open to daylight. Ask the designer to use that wall for windows and any required egress, and to plan window wells so they drain properly during monsoon downpours.