Marion County, Iowa Building Permit Guide

Outside the nine cities, Marion County requires a building permit from its Zoning Department (214 East Main Street, Knoxville; 641-828-2231, option 9) for any new building or expansion, but the permit is a zoning and setback check: the county has adopted no building code and makes no building inspections. A house permit costs $200 under Resolution 2025-68, an entrance permit and a septic permit come first, and the state inspects the wiring.

What requires a building permit in Marion County?

Chapter 55 of the county code makes it unlawful to excavate for, erect, build, rebuild, enlarge, alter or move any building or structure, or to change the use of a building or land, until the Zoning Administrator has issued a building permit. The county’s own summary is shorter: every new building and every expansion needs one, portable structures included.

Since January 1, 2023 every permanent dwelling and commercial or industrial primary structure must stand on a permanent foundation, and Pershing, previously unzoned, has been zoned R-1 and needs building permits like the rest of the county. A building near the Knoxville or Pella airport may also need the airport authority’s approval if the Zoning Administrator decides it falls within the height limitation overlay.

What the county decides and what the state holds

Marion County has been zoned since 1971 and regulates land use, setbacks, lot sizes, subdivisions, floodplains and onsite wastewater, but its building permit material states plainly that it has no building codes; proposed buildings are subject to whatever state codes, requirements and inspections apply. Under the agricultural exemption in section 55.03 (Iowa Code chapter 335), county zoning does not reach land, farm houses, farm barns and outbuildings used for agriculture, though the floodplain rules still do, and anyone claiming the exemption has to show the agricultural use. Zoning classification and the Assessor’s tax classification are separate systems with different definitions, and the county advises contacting both offices before changing how land or a building is used. The 2023 amendments also added minimum lot sizes in the C-A, C-1, C-2, M-1 and M-2 districts, and residential districts allow no more than one shipping container for storage on a lot.

Marion County building department: who handles permitting

The Zoning Department issues building permits, assigns addresses through the permit, handles rezonings, subdivisions, variances and special use permits, and administers floodplain rules for the unincorporated county. Melissa Poffenbarger is the Zoning Administrator. Septic permits come from Environmental Health, driveways from the County Engineer, and electrical permits from the State of Iowa.

Cities in Marion County

The county’s permits cover the unincorporated land, including the unincorporated communities of Attica, Columbia, Flagler, Newbern, Otley, Pershing and Tracy. Each incorporated city has its own governing body and handles permits inside its limits; county permits begin at the city line.

Marion County permit types

Permits for unincorporated parcels can be filed online, either through the county’s GeoPermits portal or from the parcel record in the county’s online map (the “Apply for Permit” tab), or on a paper form requested from the zoning email address. Only unincorporated parcels can be filed online, so check that the site is outside every city before starting.

Residential permits

The application asks for the owner’s contact details, the legal description or 911 address, the general contractor, the type and size of the building, the estimated value of the new structure alone, and a site plan showing lot dimensions, road access and front, rear and side setbacks. The plans are filed in duplicate and drawn to scale, dimensions must come from an actual survey, and the building’s location must be staked before construction. Accessory dwelling units need their own wastewater approval under chapter 44 and Iowa Code chapter 69, and a manufactured home used as one must sit on a permanent foundation and be converted to real property.

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

Commercial permits

Commercial buildings pay $300 per permit, and under Resolution 2025-68 every new building, and every addition larger than 25% of the existing structure, needs a site plan, except single-family and two-family dwellings; site plans are also required before a special use permit is considered. The Zoning Administrator can send a complex site plan to the county’s engineering or planning consultant at the applicant’s cost. The Zoning Commission reviews site plans, plats and rezonings and recommends to the Board of Supervisors.

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

What comes before the building permit

• Entrance permit. A new driveway, or a farm entrance being upgraded to residential use, must be approved by the County Engineer before the building permit is applied for; entrance permits are also filed online from the parcel record.
• Septic permit. Any new home or building that needs a wastewater system must have its Environmental Health septic permit before the building permit is approved, and reconnecting to an existing system needs a review inspection and permit.
• Zoning relief. The Board of Adjustment hears variances, special use permits and appeals of the Zoning Administrator on the second Tuesday of the month at 5 p.m. at the Marion County Office Building, 3014 East Main Street, Knoxville; petitions are due by the 10th of the month before.
• Rezoning and land division. The five-member Zoning Commission meets on the third Tuesday of the month at 5 p.m. at the same building when there are requests (petitions due by the 15th of the month before), and landowners within 500 feet of a rezoning, or 200 feet where the land is zoned residential, are notified by mail. Every division of land in the county needs county approval, and city land division rules may also apply near a city.
• Floodplain. Structures and septic systems in flood hazard areas must comply with chapter 61, and where the zoning map and FEMA’s flood map differ, the flood map controls.

Marion County permit costs and fees

The Board of Supervisors set the current fees in Resolution 2025-68, passed June 24, 2025 and effective July 1, 2025. Fees are paid before the permit issues and are not refunded if an application is denied; under the resolution, an application whose fee goes unpaid is treated as denied. Land division and rezoning fees must be paid before the Zoning Commission or Board of Supervisors takes up the request, and the resolution lets the county pass consultant review costs for complex plats and site plans on to the applicant.

The permit fees are flat, not valuation-based: a new house with a detached garage pays $200 plus $50, or $250, before the septic permit and the state electrical permit. The county’s one-page summary lists site plan review at $350, but the adopted resolution sets the filing fee at $300.

Trade permits and who may pull them

• Electrical: the State of Iowa issues the permits and does the inspections in the unincorporated county. New homes must be wired by a certified electrician and inspected by the state; homeowners may do other electrical work themselves, though it may still need a state permit and inspection. Permits are bought online at iowaelectrical.gov, which the Zoning Department links from its building permit page.
• Plumbing and mechanical: the county issues no plumbing or mechanical permits; the state plumbing and mechanical codes apply statewide and the work is done under state licenses.
• Septic: Environmental Health permits and inspects onsite wastewater systems, and systems that need ongoing servicing carry a maintenance contract with a certified contractor for the life of the system.

Because the county inspects nothing structural, owners and builders arrange any footing, framing or other inspections they want themselves; lenders and insurers may ask for them, and the county suggests checking their requirements before starting.

How to apply for a Marion County building permit

Review, corrections and what causes delay

The most common hold-up is sequence: a building permit for a house will not be finalized until the septic permit has been obtained, and the entrance has to be approved before the application. Applications in a flood hazard area, an airport height zone or a district where the use needs a special use permit or variance wait for those steps. A permit becomes void if work has not started within six months, and the building must be finished within 18 months of issue.

Inspections in Marion County

Marion County does not provide building inspections of any kind with its permit, and the owner is responsible for any footing, foundation, framing, plumbing, mechanical, deck or fence inspections they want or that another authority requires. What the county does check is location: staff explain the setbacks when the permit is filed and, for most new principal buildings, may look at the setback stakes before construction begins, but it is the owner’s job to know where the lot lines are and to keep the as-built position within the setbacks.

Two inspections come from other offices. Environmental Health inspects the septic system under its permit, and the state electrical inspector inspects new-home wiring after the permit is requested at iowaelectrical.gov. Once the address is assigned and a permanent, improved driveway is in place, the 911 department installs the address marker, billed at $150. The zoning ordinance also notes that mobile homes, as Iowa Code chapter 322 defines them, are subject to state inspections.

Iowa building code

Marion County has adopted no building code for unincorporated land; its permit enforces zoning, and state codes apply on their own terms. FEMA’s Community Status Book lists Marion County (community 190889) as participating in the National Flood Insurance Program, with a current effective map dated February 16, 2018, which FEMA marks as a map with no elevations.

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

Marion County permit search and official resources

Permit records for a rural parcel can be requested from the Zoning Department as public records under Iowa Code chapter 22, and parcel, zoning and ownership information is in the county’s online map. Appointments with zoning staff can be booked online.

• Marion County building permits
• GeoPermits portal for Marion County
• Building permit application information (September 2025)
• Zoning fee policy and Resolution 2025-68
• Zoning FAQ
• Zoning forms
• Zoning ordinance, chapter 55
• Subdivision ordinance, chapter 56
• Board of Adjustment
• Zoning Commission
• Iowa electrical permits (iowaelectrical.gov)
• DIAL electrical permits and inspections
• FEMA Community Status Book, Iowa

Marion County building permit FAQs

Do I need a building permit in rural Marion County?

Yes, for any new building or expansion, even a portable structure. The permit is issued by the Zoning Department and checks zoning and setbacks.

Does Marion County inspect new houses?

No. The county has no building code and performs no building inspections; the state inspects electrical work and Environmental Health inspects septic systems.

How much does a building permit cost in Marion County?

$200 for a house, $400 for a duplex, $50 for an accessory building or addition and $300 for a commercial building, under Resolution 2025-68.

Do farm buildings need a permit in Marion County?

They are filed and reviewed, but there is no fee; the county uses them for assessment data, and floodplain rules still apply.

How do I get a 911 address for a new house?

Through the building permit; addresses are not assigned to bare ground, and the $150 marker is installed after the permanent driveway is built.

Who zones land just outside Pella?

Pella, for unincorporated land within one mile of the city shown as Subarea A, under a 28E agreement written into the county zoning ordinance.

Which comes first, the septic permit or the building permit?

The septic permit. A new home’s building permit is not finalized until Environmental Health has issued it.

Simplify Marion 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 Marion County permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.