Des Moines, Iowa Building Permits
Learn Des Moines, Iowa building permit requirements, costs, timelines, zoning checks, inspections, and code rules for residential and commercial projects.
Wind
ASCE 7 basic wind speed: generally 115 mph ultimate design wind speed for Risk Category II buildings in the Des Moines area; higher risk categories and special structures may require project-specific analysis.
Snow Load
Ground snow load: approximately 25 psf in the Des Moines area; roof snow load must be calculated based on exposure, thermal condition, importance factor, drifting, and roof geometry.
Flood
Des Moines has FEMA Special Flood Hazard Areas along the Des Moines River, Raccoon River, Fourmile Creek, and other drainage corridors. Projects in mapped A or AE zones typically need floodplain review, elevation documentation, flood-resistant materials, and compliance with local floodplain ordinances.
Earthquake
Seismic risk is low. Most typical sites fall in Seismic Design Category A or B depending on site class, occupancy, and mapped spectral response values; commercial projects should confirm the category during code analysis.
Wildfire
Wildfire risk is generally low and Des Moines is not typically regulated as a wildland-urban interface jurisdiction. Normal fire code, defensible access, hydrant, and vegetation-clearance requirements may still apply, especially for larger developments or edge-of-city sites.
Building Department
City of Des Moines Permit and Development Center / Development Services Department, including Building and Zoning review staff.
Approval Timeline
Simple residential permits such as roofing, siding, windows, decks, minor alterations, and trade permits may be issued the same day or within 1-5 business days when the application is complete. Residential additions, structural remodels, garages, and new single-family homes commonly take about 1-3 weeks. Commercial tenant improvements, changes of occupancy, restaurants, multifamily work, and new commercial buildings often require 2-6 weeks or more, depending on zoning, fire, accessibility, stormwater, floodplain, and resubmittal issues.
Common Requirements
Typical submittals include a completed permit application, property address and parcel information, owner and contractor information, project valuation, scope of work, site plan, floor plans, elevations, framing details, foundation details, energy-code information, and product specifications. Decks, garages, additions, and new homes usually need a dimensioned site plan showing property lines, setbacks, easements, driveways, utilities, and drainage. Commercial projects typically require code analysis, occupant load, egress plans, accessibility details, mechanical/electrical/plumbing drawings, fire alarm or sprinkler plans when applicable, and architect or engineer-sealed drawings when required by Iowa law.
Zoning Information
Des Moines uses a zoning ordinance with neighborhood, mixed-use, commercial, industrial, downtown, planned unit development, floodplain, and overlay districts. Zoning review looks at allowed use, setbacks, building height, lot coverage, parking, signage, accessory structures, and design standards. Properties near the Des Moines River or Raccoon River, in historic districts, or within special overlays may require additional review before a building permit can be issued.
Permit Costs
Des Moines permit fees are generally based on project type, valuation, and required plan review. Small residential trade or repair permits may be roughly $50-$150. Decks, detached garages, remodels, and additions often range from about $100-$700 or more depending on valuation. New homes can total several hundred to several thousand dollars after building, trade, sewer, sidewalk, and plan-review fees. Commercial permits are usually valuation-based and may range from several hundred dollars for small tenant finishes to thousands or tens of thousands for major construction. Applicants should verify current fees with the city fee schedule before budgeting.
Engineering Requirements
Engineer or architect stamps are commonly required for commercial buildings, multifamily buildings, structural alterations, unusual foundations, retaining walls above code thresholds, large openings in bearing walls, steel or engineered wood framing, pre-engineered metal buildings, high-wind or snow-load-sensitive structures, and projects outside prescriptive IRC limits. Iowa licensing rules may also require registered design professionals for many commercial projects. Floodplain projects may require elevation certificates and engineered flood-resistant construction details.
Local Code Adoption
Des Moines enforces locally adopted International Codes with city amendments, including recent editions of the International Building Code and International Residential Code. Applicants should confirm the current adopted edition and amendments with the Permit and Development Center because code cycles and local amendments change over time.
Typical Projects
Common permitted projects in Des Moines include basement finishes, decks, detached garages, kitchen and bath remodels, additions, roof replacement, siding, window replacement, accessory dwelling or accessory structure projects where allowed, tenant improvements, restaurant build-outs, multifamily renovations, downtown adaptive reuse, and floodplain repairs near river corridors.