⚡ Quick Answer for Des Moines
ADUs — garage conversions, backyard cottages, in-law suites — always require permits. Many states have streamlined the process. Des Moines uses online permit applications. Iowa's locally-adopted building codes apply. Tornado risk is present in Iowa, affecting some local code provisions. Permit fees are very affordable by Midwest standards.
$800Fee (Low End)
$3,000Fee (High End)
$1,500Typical Fee
VariesProcessing Time
Des Moines Building Department
When Is a ADU Permit Required in Des Moines?
A permit is typically required when:
- Converting a garage to living space
- Building a detached backyard cottage
- Adding a basement apartment
- Any separate dwelling unit on your property
When Is a Permit NOT Required?
- There are no exemptions for ADUs — all habitable units require permits
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ADU Permit Costs in Des Moines
| Cost Factor | Details for Des Moines |
|---|
| Typical permit fee range | $800–$3,000 |
| Most common fee | $1,500 |
| Cost tier | Below average (affordable city) |
| Additional permits | Electrical, plumbing, or mechanical permits may be required separately |
| Plan review fee | May be charged separately for complex projects |
Contact Des Moines Permit & Development Center directly for current, exact fee schedules.
How to Get a ADU Permit in Des Moines
- Check requirements — Visit Des Moines Permit & Development Center to confirm current requirements for your specific project.
- Prepare documents — Gather site plans, project drawings, and any required documentation.
- Submit your application — Most Des Moines permits can be submitted online through the city portal.
- Pay the permit fee — Expect to pay $800–$3,000 for a typical adu permit in Des Moines.
- Schedule inspections — Your permit will specify required inspection stages. Call to schedule after each phase.
- Get final approval — After all inspections pass, your work is on the official record and compliant.
Frequently Asked Questions
Do I need a adu permit in Des Moines, IA?
ADUs — garage conversions, backyard cottages, in-law suites — always require permits. Many states have streamlined the process. In Des Moines: Des Moines uses online permit applications. Iowa's locally-adopted building codes apply. Tornado risk is present in Iowa, affecting some local code provisions. Permit fees are very affordable by Midwest standards.
How much does a adu permit cost in Des Moines?
ADU permit fees in Des Moines typically range from $800–$3,000, with most projects around $1,500. Contact Des Moines Permit & Development Center directly for exact current fees, as they can change year to year.
How do I apply for a adu permit in Des Moines?
Apply through Des Moines Permit & Development Center at https://www.dsm.city/departments/permit_and_development_center-division/index.php. Most projects can be submitted online. You'll need project plans or drawings, property information, and payment for the permit fee.
What happens if I build without a permit in Des Moines?
Building without a required permit in Des Moines can result in fines, stop-work orders, required demolition, and complications when selling your home. Always verify requirements before starting any project.
Other Cities Near Des Moines
Compare adu permit requirements in nearby cities:
Omaha · Lincoln · Kansas City
Other Permit Types in Des Moines
Need a different permit in Des Moines?
Shed Permit · Deck Permit · Fence Permit · Roof Permit · HVAC Permit · Electrical Permit · Plumbing Permit · Addition Permit
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Licensed local contractors know your city's permit requirements and handle the paperwork for you. Get free quotes in minutes.
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