Do I need a permit to replace my roof or siding?

Roof and siding replacement are typically exempt from permitting if you're using the same materials and not changing the structure. However, if you're replacing 25% or more of the roof or siding, or if you're making changes to framing, insulation, or ventilation, a permit may be required. Call the building department with photos and details of the planned work. When in doubt, a 10-minute phone call saves you from having to tear out unpermitted work later.

What is the frost depth and why does it matter?

West Des Moines is in a 42-inch frost-depth zone. This means the ground freezes to 42 inches in a typical winter. Any permanent footing — deck posts, shed foundations, fence posts set in concrete — must be buried below 42 inches so freezing and thawing don't heave the structure up and crack it. If you set a deck footing at 36 inches and an inspector checks it, you'll be ordered to reset it. This is enforced strictly because frost heave causes real damage. Plan any footing work with this in mind, and don't try to cheat the depth — inspectors know the rules and will catch it.

Can I file for a permit online?

As of this writing, West Des Moines does not offer online permit filing. You must submit applications in person at City Hall during business hours. The advantage is that staff can often give you immediate feedback on your application and drawings, and you can fix issues and resubmit the same day. Bring a completed application form, a site plan showing property lines and the structure location, and any required drawings (deck details, electrical single-line diagrams, etc.). Call ahead to confirm hours and to ask what specific documents your project needs.

How long does it take to get a permit approved?

Simple projects like fences and small decks typically clear in 2 to 4 weeks. More complex projects (additions, electrical subpanels, HVAC work) may take 4 to 8 weeks depending on how quickly the building department's plan reviewers can work through the backlog. Over-the-counter permits for straightforward projects sometimes get approved same-day or next-day. If you need a permit quickly, call the building department and ask what projects are moving fastest. Seasonal backlog (spring/summer) can add 1 to 2 weeks.

What happens if I build without a permit?

If the city discovers unpermitted work, you'll be ordered to stop construction, obtain a retroactive permit, and pass inspection. Unpermitted work can also complicate a home sale — title insurance may not cover defects in unpermitted structures, and a future buyer's lender may require permits before closing. Demolition and rework can cost far more than the original permit. The permit fee itself is small compared to the risk. If you're uncertain whether your project needs a permit, call the building department first. That 10-minute conversation can save you tens of thousands of dollars in potential rework.

Do I need a permit for a small shed or storage building?

Sheds typically need a permit if they're over 120 square feet or have a permanent foundation. Very small utility structures (under 120 square feet, no electrical, no sewer connection, portable or temporary) may be exempt, but West Des Moines has specific exemption criteria. The safe move is to call the building department with your shed's dimensions and intended use. If you're buying a prefab shed kit, ask the vendor whether it triggers permitting — some kits are designed to fit exemption thresholds, others aren't.

Who pulls the permit for electrical work?

For electrical work, a licensed electrician typically pulls the permit in Iowa. Homeowner electrical work is very limited — usually you can replace outlets, switches, or fixtures on existing circuits, but you cannot add new circuits, upgrade a panel, or relocate service. Ask the electrician to confirm what work requires a permit and whether you can pull it yourself (you usually cannot for the work that matters). The electrician will also pull any required subpermits and sign off on the final inspection.

What is the cost of a typical permit in West Des Moines?

Costs vary by project type. Fences and decks run $50–$150. Sheds run $75–$200. Electrical work and HVAC typically cost $75–$150 for the permit itself. Larger projects (additions, structural work) use a percentage-of-project-valuation fee, usually 1.5 to 2 percent of estimated construction cost. Bring a realistic cost estimate when you file — undervaluing to lower the fee is a red flag. Ask the building department for a fee schedule when you call; they can quote an exact fee based on your project scope.

Building Permits in West Des Moines, IA (2026)

Do I need a permit in West Des Moines, IA?

West Des Moines follows Iowa's state building code (based on the 2015 International Building Code) and enforces it through the City of West Des Moines Building Department. The city sits in Climate Zone 5A with a 42-inch frost depth — a critical detail for any project involving footings or foundation work. Most residential projects need a permit: decks, fences, sheds, additions, electrical upgrades, plumbing work, and HVAC replacements. Some smaller projects and routine maintenance are exempt, but the exemptions are narrower than many homeowners expect. The building department processes permits in person at City Hall. There is no unified online filing portal as of this writing, so you'll need to visit or call to understand your specific project's requirements and submit paperwork. West Des Moines takes permit compliance seriously — unpermitted work can create problems when you sell, and the city does conduct inspections to catch violations. The good news: most routine residential permits process quickly once filed correctly. A fence or deck permit typically clears in 2 to 4 weeks. More complex projects (additions, electrical work) may take 4 to 8 weeks depending on plan-review workload.

What's specific to West Des Moines permits

West Des Moines enforces Iowa's adoption of the 2015 IBC with state-level amendments. The 42-inch frost depth is deeper than the IRC's default 36 inches, so all footings (deck posts, shed foundations, fences in some cases) must go below 42 inches to account for frost heave during winter. This is non-negotiable — if you pour a footing at 36 inches, an inspector will flag it and you'll have to dig and reset. This matters most for decks and any structure with a permanent foundation.

Deck and shed exemptions are tighter in West Des Moines than in some neighboring communities. Small decks (typically under 200 square feet, under 30 inches high, and detached) may be exempt from permitting in some jurisdictions, but West Des Moines requires a permit for most decks. The city wants to verify that footings are set correctly, guardrails meet code, and the structure won't create drainage or neighbor-impact issues. If you see an exemption listed elsewhere, call the building department to confirm it applies here — don't assume.

The building department processes most residential permits over the counter: you bring in a completed application, site plan, and any required drawings, and staff can often give you feedback same-day. This means you can sometimes fix rejections and resubmit on the same visit. Plan-review turnaround is faster for straightforward projects (fences, decks, sheds) than for additions or major electrical work. The department does not charge for applications — you pay only the permit fee itself.

West Des Moines uses a percentage-of-valuation fee structure for most permits. Decks, sheds, and minor projects run $50 to $200 depending on size and scope. Additions and structural work scale with project value — typically 1.5 to 2 percent of the estimated construction cost. If you're filing a permit, bring a realistic cost estimate. Undervaluing a project to lower the fee is a red flag for inspectors and can result in permit denial or rework orders. Be honest about the scope and cost.

Owner-builder work is allowed for owner-occupied single-family homes, but you still need permits for structural, electrical, and plumbing work. If you're doing carpentry on a deck or shed, you can pull the permit yourself. If you're adding a circuit or running gas, a licensed electrician or plumber will likely need to pull the permit and sign off. Check with the building department on the specific trade licensing requirements for your project — some work can be owner-pulled, some cannot.

Most common West Des Moines permit projects

These are the residential projects that bring homeowners to the building department most often. Click any project to see the specific West Des Moines permit path, likely costs, and filing checklist.

Decks

Most decks require a permit. West Des Moines demands footings at or below 42 inches, proper guardrails, and a site plan showing the deck's location and distance from property lines. Plan on a $75–$150 permit fee and 2–3 weeks for approval.

Fences

Residential fences over 6 feet, all masonry or retaining walls, and any fence in a corner-lot sight triangle require a permit. Pool barriers always require a permit regardless of height. West Des Moines fees are typically $50–$100 for a standard fence.

Do I need a building permit
in West Des Moines, IA?

Do I need a permit in West Des Moines, IA?

What's specific to West Des Moines permits

Most common West Des Moines permit projects

Decks

Fences

Electrical work

HVAC

Room additions

Do I need a building permit in West Des Moines, IA?

Do I need a permit in West Des Moines, IA?

What's specific to West Des Moines permits

Most common West Des Moines permit projects

Decks

Fences

Electrical work

HVAC

Room additions

Do I need a building permit
in West Des Moines, IA?