Des Moines Floodplain and Wetland Building Rules

Land Use and Zoning Iowa 3 Minutes Read · published February 10, 2026 Flag of Iowa

In Des Moines, Iowa, property owners who build, alter, or place fill in floodplains or wetlands must follow municipal rules and obtain required permits before starting work. This guide explains where to look in the municipal code, which city office enforces regulations, common compliance steps, and what to do if you need a variance or appeal. It focuses on practical actions owners must take when working near mapped floodplains and regulated wetland areas within city limits.

Overview

Local regulation addresses building elevation, fill, stormwater control, and wetland protection to reduce flood risk and preserve water resources. Requirements typically depend on whether your parcel is in a FEMA-designated floodplain, a local delineated wetland, or within specific overlay zones established by the City of Des Moines. See the city ordinance for controlling language and definitions.[1]

Key requirements for owners

  • Obtain building and zoning permits before starting grading, fill, or construction in floodplain or wetland areas.
  • Provide elevation certificates, FEMA forms, and site plans when required by the permit checklist.
  • Follow construction standards for minimum finished floor elevation and floodproofing where applicable.
  • Comply with stormwater management and erosion-control measures during and after work.
  • Do not place permanent fill or structures in regulated wetlands unless a specific permit or mitigation plan is approved.
Confirm your lot’s flood zone early with the city's planning or permit office.

Penalties & Enforcement

Enforcement is carried out by the City of Des Moines Development Services / Building and Inspection Division and related environmental or planning staff; complaints and inspections can trigger compliance orders. The municipal code contains the controlling ordinance language and penalties for violations.[1]

  • Fine amounts: not specified on the cited page.
  • Escalation: first, repeat, or continuing offence ranges are not specified on the cited page.
  • Non-monetary sanctions: stop-work orders, restoration orders, permit revocation, and court actions may be imposed.
  • Enforcer and inspections: Development Services and Building Inspection staff perform site inspections and issue orders; complaints are accepted by the city planning or building hotline.
  • Appeals and review: appeal routes are defined in the municipal code or permit conditions; specific time limits for appeals are not specified on the cited page.
  • Defences and discretion: permitted variances, documented emergency work, or approved mitigation plans can affect enforcement outcomes.
If you discover unpermitted fill or work, stop and contact Development Services immediately.

Applications & Forms

Typical applications include building permits, site grading permits, and floodplain development permits. The city publishes permit checklists and forms for submittal; if a specific form number or fee is not published, the city permit page lists current procedures and submission methods.

  • Permit types: building permit, floodplain development permit, stormwater/grading permit.
  • Fees: consult the current fee schedule on the city permit page; if a fee amount is not posted, it is not specified on the cited page.
  • Submission: typically online or at Development Services; use the official permit portal or office intake instructions.

Common violations

  • Placing fill that raises the grade in a regulated floodplain without a permit.
  • Constructing a structure below required elevation or without required floodproofing.
  • Failing to implement erosion-control or stormwater measures during work.
  • Altering a wetland without an approved permit or mitigation plan.

FAQ

Do I need a permit to place fill in a floodplain?
Yes—placing fill in a mapped floodplain generally requires a permit and review; consult Development Services for the specific permit type and required documentation.
How do I know if my property is in a floodplain?
Check FEMA flood maps and the city’s floodplain maps, and confirm with the city planning or permit office before work begins.
Can I get a variance for wetland impact?
Variances or mitigation may be possible but require formal application and staff review; mitigation plans are typically required when impacts are authorized.

How-To

  1. Confirm your parcel’s floodplain and wetland status with the city or FEMA maps.
  2. Contact Development Services to request the permit checklist and application packet.
  3. Prepare required documents: site plan, elevation certificate, and stormwater control measures.
  4. Submit the application and pay fees; respond to review comments promptly.
  5. Schedule inspections and complete required mitigation or restoration as ordered.

Key Takeaways

  • Always check floodplain and wetland status before purchasing or building.
  • Permits, elevation data, and stormwater controls are commonly required.
  • Contact Development Services early to reduce delays and enforcement risk.

Help and Support / Resources

  1. [1] City of Des Moines Code of Ordinances - municipal regulations and definitions

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