Sioux Falls Basement Finishing Costs: How the City Values Your Project and Sets the Fee

A free cost and process guide for homeowners in Sioux Falls and the rest of Minnehaha County, from Get Basement Pros.

A city that publishes the math

Sioux Falls makes basement permit costs unusually easy to estimate. The City of Sioux Falls' 2026 fee schedule values finished basements at $79.00 per square foot for new residential construction and additions, alongside $128.00 per square foot for finished habitable space and $41.00 for unfinished space. For remodels and renovations, including finishing an existing basement, the valuation is the actual bid price. That valuation then runs through the city's fee scale.

The fee scale

The 2026 schedule charges $40.00 for residential work valued up to $4,000. Above that, the fee rises with valuation; some points on the scale:

$140.50 for a job valued at $19,001 to $20,000;
$193.00 for $29,001 to $30,000;
$283.00 for $49,001 to $50,000.

Ask your contractor whether the permit is in the quote, and remember that trade permits for electrical, plumbing and HVAC work are separate.

Test for radon first

South Dakota's Department of Agriculture and Natural Resources offers free radon test kits to residents. It notes that radon enters buildings through foundation cracks, utility penetrations, sumps and floor drains, and that testing is the only way to tell whether a building has elevated levels. Test before finishing; mitigation is simpler before walls are closed.

The license to ask for

The City of Sioux Falls requires a Residential Building Contractor license of anyone doing work on one- and two-family homes and townhomes that needs a building permit, and it names basement finishing as one such job. Homeowners working on their own homes need no license but must get the permits.

The order of work

1. Fix any water issues: grading, downspouts, sump pump. 2. Radon test and mitigation if needed. 3. Design, including egress windows for bedrooms. 4. Permits. 5. Framing with a moisture break from concrete. 6. Rough electrical, plumbing and ductwork. 7. Rough-in inspections. 8. Insulation, drywall and finishes. 9. Final inspection.

Cold-climate details

Ask how the contractor will insulate the foundation walls and rim joists, and how they will control moisture behind the insulation. Make sure the sump pump has a backup.

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.

Sources for this guide

For new residential construction and additions, Sioux Falls' 2026 schedule values finished habitable space at $128.00 per square foot, finished basements at $79.00, unfinished space at $41.00, attached garages at $42.00 and detached garages at $38.00 when it sets the permit fee. Source: City of Sioux Falls, 2026 Fee Schedule (Building Services)
The City of Sioux Falls' 2026 fee schedule charges $40.00 for residential work valued up to $4,000; above that the fee rises with valuation, for example $80.50 for a job valued at $9,001 to $10,000, $140.50 for $19,001 to $20,000, $193.00 for $29,001 to $30,000 and $283.00 for $49,001 to $50,000. Remodels and renovations are valued at the actual bid price. Source: City of Sioux Falls, 2026 Fee Schedule (Building Services)
South Dakota's Department of Agriculture and Natural Resources offers free radon test kits to residents. It notes that radon enters buildings through foundation cracks, utility penetrations, sumps and floor drains, and that testing is the only way to tell whether a building has elevated levels. Source: South Dakota DANR, Air Quality: Radon
The City of Sioux Falls requires a Residential Building Contractor license of anyone doing work on one- and two-family homes and townhomes in the city that needs a building permit, such as decks, sheds, shingles and basement finishing. The license takes a passing score on an open-book code exam, a $20,000 compliance bond and at least $300,000 of general liability insurance. Homeowners working on their own homes need no license but must get the permits. Source: City of Sioux Falls, Residential Building Contractors

Sources checked 2026-10-26. Every cost figure on this page comes from a source named above; fees and rules change, so confirm current amounts with the office that sets them before you budget.

More for Sioux Falls homeowners: Basement in Sioux Falls, SD.