Clinton County, Iowa Building Permit Guide

In unincorporated Clinton County, the Planning and Zoning office at 226 11th Street in DeWitt (563-659-8149) issues zoning permits, which the county also calls building permits, for every non-farm structure, and floodplain development permits for any work in a mapped flood zone. The permit checks use, lot size and setbacks; the county has not adopted a building code. A new house costs $100, septic and well permits come from the County Health Department, and driveways and 911 addresses from the County Engineer.

What requires a permit in unincorporated Clinton County?

Every non-farm structure outside city limits needs a zoning permit before construction starts. The county counts erecting, building, rebuilding, moving, converting, altering or adding to a building as construction, and any horizontal or vertical expansion of an existing building needs a permit.

The zoning ordinance allows one house per lot or parcel. The single exception is a secondary farm dwelling for the owner or spouse, a full-time farm employee, or a parent or child of the owner or spouse, within 250 feet of the main farm dwelling and never sold separately.

What Clinton County decides and what the state holds

The county’s land rules are its Zoning Ordinance of February 17, 1999, amended through October 3, 2016, its Subdivision Regulations, its Flood Plain Ordinance and its Master Plan. On December 1, 2025 the Board of Supervisors added Section 4.2.21, under which any data center or cryptocurrency mining facility needs a special use permit with site plan review. The county’s posted ordinances include no building code, so there is no county plan review or framing inspection; construction standards, energy rules and trade licenses are state matters, and septic and well rules come from Iowa law through the County Health Department.

Clinton County building department: who handles permitting

Planning and Zoning, led by Director Thomas Barnes, handles zoning permits, floodplain permits, subdivisions, rezonings and the Board of Adjustment; the director signs each zoning permit. Environmental Services in the Health Department regulates every private septic system and well, and the County Engineer’s Secondary Roads Department handles entrances, work in the road right of way and 911 address signs.

Cities in Clinton County

Each incorporated city sets its own permit rules inside its limits. The county’s zoning page refers city questions to the cities themselves and lists zoning contacts for DeWitt (563-659-3811) and Camanche (563-259-8342).

Clinton County permit types

The county’s zoning permit application is a two-page form: the applicant describes the project, its estimated cost of materials and labor and the wastewater and water supply, and signs that the work will follow the Master Plan, Zoning Ordinance, Subdivision Regulations and Flood Plain Ordinance. Staff then work through an approval checklist before the director signs.

Residential permits

A house needs a legal lot of at least 2 acres in the A-1, AR-1 and R-1 districts, and at least 2 acres wherever a septic system is used. On A-1 or AR-1 land the checklist asks whether a feedlot or confinement operation lies within a quarter mile (1,320 feet) and whether more than 25% of the soil has a corn suitability rating above 60. A-1 allows one non-farm dwelling per 40 acres, so a new non-farm lot there needs an agricultural easement reserving the rest of the 40 acres for farming before the lot can be approved. The site plan, drawn to scale, shows the lot lines, existing features, the new building and its distances to the lines, and the location of any well and septic system.

Building or remodeling a home here? Alliance handles home building permits, so the crew isn't waiting on the counter.

Commercial permits

Commercial and industrial buildings take the same zoning permit in the C-1, C-2, M-1 and M-2 districts, which call for lots of 1 to 5 acres. Uses that a district lists as special exceptions go to the Board of Adjustment, and data centers and cryptocurrency mining need a special use permit with a site plan under the 2025 amendment.

For tenant improvements and new commercial builds, Alliance handles commercial permit filing through issuance. More on this: commercial building permits explained.

What comes before the building permit

• Lot approval. A lot must meet the zoning and subdivision rules before any permit; plats of survey for a lot split cost $15, and subdivisions go to the Planning and Zoning Commission.
• Percolation test. Acceptable results are needed before the zoning permit for any building that will use a septic system.
• Entrance and address. The County Engineer issues driveway permits and handles E911 addressing for new building sites.
• Floodplain. A floodplain development permit, with Iowa DNR and Corps of Engineers approval for some work along the Mississippi and Wapsipinicon rivers. Staff review these applications as they arrive, with no Commission hearing; each states the intended use, the legal description, the 100-year flood elevation, the lowest floor elevation and the estimated cost of the improvement.

Clinton County permit costs and fees

Planning and Zoning fees follow the schedule effective December 20, 2021. Permit fees double if construction begins before a permit is approved, and applicants pay any consulting or legal fees needed to review rezoning, subdivision or Board of Adjustment cases.

A typical new rural home therefore pays $100 for the zoning permit, $150 for a residential septic permit and $150 for a well, plus the engineer’s percolation test and the contractor’s own costs; a detached garage added later is $50. State electrical permit fees are separate.

Trade permits and who may pull them

• Electrical: the county’s posted ordinances and forms include no electrical permit or inspection program, so rural electrical work is permitted and inspected through the State of Iowa (DIAL) by state-licensed electricians.
• Plumbing and mechanical: done by state-licensed plumbers and HVAC contractors, with no county permit or county inspection.
• Septic: the Health Department sizes each system from the percolation test and fixture count, sells the construction permit and inspects the installation; it keeps lists of contractors, engineers and certified time-of-transfer inspectors.
• Wells: new wells need a $150 Health Department permit, and the department tests existing wells for coliform, E. coli, nitrates, arsenic and manganese at no charge. Through the state’s Private Well Grants Program it also reimburses owners for plugging qualified abandoned wells and cisterns and for well repairs, once the DNR plugging or reconstruction record and a paid invoice are filed; a well needs nitrate below 45 mg/L to qualify for reconstruction money.

State contractor registration applies to builders here; nothing on the county’s pages adds a local one.

How to get a Clinton County zoning permit

Review, corrections and what causes delay

Routine zoning permits are reviewed by staff, but anything needing a hearing takes weeks: complete Board of Adjustment applications are due at least 20 days before the hearing, notices are published at least 15 days ahead in the Clinton Herald and DeWitt Observer, and owners within 500 feet are mailed. The usual obstacles are lots under 2 acres for a septic system, A-1 parcels without an agricultural easement, nearby livestock operations and prime soils, and setbacks that need a variance. Variances are limited to height, area, structure size and yard size, and economic hardship does not qualify.

The Board of Adjustment has five citizen members appointed by the supervisors for five-year terms, most of them living in the unincorporated county, and meets only when applications are pending; its 2026 schedule lists evening meetings on July 21, September 15 and November 17. Anyone who disagrees with a final decision of the zoning administrator can appeal in writing within 30 working days, with the fee and a statement of why the decision is wrong; the board must hear the appeal within 30 days and decide within 30 days after the hearing closes. At a hearing the applicant presents first, the chair takes public comments in support and then in opposition, and the applicant may answer before the board votes.

Inspections in Clinton County

Because the county has no building code, its zoning permit carries no footing, framing or final building inspections; the permit is a review of the use, the lot and the setbacks shown on the site plan before work starts. Electrical work is inspected by the state.

The Health Department inspects septic systems. Owners or contractors tell the sanitarian’s office when construction begins (24 hours’ notice is appreciated) and when the system is ready, with at least two hours’ notice for the inspection; a replacement septic tank or distribution box under a component permit needs no inspection. Floodplain permits rely on elevations certified by a registered land surveyor: the 100-year flood elevation and the elevation of the new lowest floor. Entrances follow the Secondary Roads entrance policy, other work in the road right of way needs its own permit, and mailboxes must meet county support rules because Iowa Code chapter 318 bars obstructions in the right of way.

Iowa building code

Clinton County has not adopted a building code for its unincorporated area; its permits enforce the zoning, subdivision and floodplain ordinances. FEMA’s Community Status Book lists Clinton County as participating in the National Flood Insurance Program, with its current flood maps effective July 19, 2023.

Iowa lets most cities and counties adopt the state building code, another code or none (a city of more than 15,000 must enforce at least the state code), but the energy, accessibility, fire, plumbing, mechanical and electrical rules apply statewide. Iowa rules

Clinton County permit records and official resources

Zoning and floodplain permit files are kept by Planning and Zoning in DeWitt, and septic and well records by the Health Department; request them from those offices or under Iowa Code chapter 22. The county GIS property search shows parcels, and supervisors’, Planning and Zoning Commission and Board of Adjustment agendas are posted on the county site.

• Planning and Zoning
• Zoning permits and setbacks
• Zoning permit application
• Zoning fee schedule (Dec. 20, 2021)
• Zoning FAQ
• Zoning Ordinance
• Floodplain management
• Board of Adjustment
• Data center zoning amendment, December 1, 2025 minutes
• Septic systems (Health Department)
• Water supply and wells
• Secondary Roads
• Road permits and policies
• GIS and property search
• FEMA Community Status Book, Iowa

Clinton County permit FAQs

Does Clinton County require a building permit?

It requires a zoning permit, which it also calls a building permit, for every non-farm structure outside city limits. There is no county building code inspection.

How much is a permit for a new house?

$100 for the zoning permit, plus $150 for a residential septic permit and $150 for a new well where needed.

How big must a rural lot be?

At least 2 acres in the A-1, AR-1 and R-1 districts and wherever a septic system is used.

Can I build a second house on my land?

Only a secondary farm dwelling for the owner, a farm employee or close family, within 250 feet of the main farm house.

Do farm buildings need a permit?

Buildings primarily used for agriculture are exempt from zoning, but not from floodplain permits.

Who issues 911 addresses and driveway permits?

The County Engineer’s office, which also maintains the 911 address signs.

Who inspects electrical work?

The State of Iowa; the county has no electrical permit program.

Who issues permits in DeWitt or Camanche?

The city. The county’s permits cover only unincorporated land.

Simplify Clinton County permitting with Alliance Permitting

Alliance Permitting is a permit documentation and submission company in Iowa. We prepare your paperwork, file it correctly and coordinate with the permitting authority through issuance. We are not a contractor and we do not perform licensed plan review or inspections; that work stays with your licensed team and the jurisdiction.

This guide is provided by Alliance Permitting for general information about Clinton County permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.