Winneshiek County, Iowa Building Permit Guide

In unincorporated Winneshiek County, the Planning & Zoning office at 201 W. Main Street, Decorah (563-387-4080), issues a Construction Compliance Certificate before any building is erected or enlarged, a dwelling unit is added or a use changes. The fee is $50 to $200 by construction cost, doubled if work has started, and farmhouses are free. The County Engineer issues the driveway permit and the 911 address, the Sanitarian the septic and well permits, and the state the electrical permit.

What requires a permit in unincorporated Winneshiek County?

Zoning Ordinance V requires a Construction Compliance Certificate before any construction or development in any district: a new building, a structural alteration that increases exterior dimensions, height or floor area, a remodel that adds a dwelling unit, or a change of use. Ordinary maintenance that does not enlarge a building is exempt.

Farm dwellings and other buildings meant for people to live in must still meet the same floodplain rules as non-farm houses. In the A-1 district a dwelling permit cannot be issued on land the county’s future land use plan designates for commercial or industrial use.

What Winneshiek County decides and what the state holds

The county’s combined Zoning Ordinance and Subdivision Regulation V was adopted September 28, 2015 and last amended June 1, 2026, when Ordinance 26-265 added data centers to the M-2 General Industrial district. It contains the bluffland, public water well and airport overlays, solar and wind rules, accessory dwelling units and floodplain management, but no building code: the certificate confirms zoning compliance only. For buildings that need state accessibility or energy-code compliance, the applicant must first hand the Zoning Administrator a state compliance certificate, and the ordinance says the county is not responsible for those inspections.

Winneshiek County building department: who handles permitting

Zoning Administrator Tony Phillips issues Construction Compliance Certificates and brings Planning & Zoning Commission recommendations to the Board of Supervisors. The county’s own guide to building in the country sets the order: the County Engineer checks the driveway and assigns the 911 address, the Sanitarian sites the well and septic system, and the Zoning office then issues the building permit.

Cities in Winneshiek County

The ordinance applies outside city limits only; each city handles permits inside its own boundaries.

Winneshiek County permit types

Beyond the Construction Compliance Certificate, the fee resolution lists variances, special exceptions, administrative appeals, conditional use permits, zoning map and text changes, subdivisions and lot divisions, certificates of temporary operation, signs and floodplain development applications. The Zoning office posts the ordinance, zoning maps, a land division application and the comprehensive plan.

Residential permits

A certificate application must be complete and carry a site plan showing existing and proposed buildings, uses, open spaces, parking and other features. In the A-1 Agricultural district, non-farm houses are limited to one per 35 acres counted by quarter-quarter section, on a lot of at least 1 acre (more if the Sanitarian recommends it) with 120 feet of frontage. Setbacks are 25 feet front, 30 feet rear, 15 feet side and 30 feet on the street side of a corner lot, height is capped at 35 feet or 2½ stories, and new non-farm homes must stay 1,250 feet from an existing livestock confinement or feedlot and its manure lagoon. A farmstead that existed when the ordinance was adopted can be split off with up to two existing homes and 1 acre for each.

Accessory dwelling units are allowed in the A-1, A-R, R-1 and R-2 districts and do not count against density. The landowner applies with a plot plan showing both units, roads, utilities, wells, septic systems and easements, plus a deed restriction; only one unit is allowed per house, it needs its own 911 address and a permanent foundation, and a house cannot have both an accessory unit and a cabin.

Home solar is an accessory use in every district. A ground-mounted personal system needs a building permit from the landowner, with a plot plan of the property, existing buildings, panel location and any adjoining road right of way, and the panel and inverter make and model, kW rating, mounting and any battery storage; components must be UL-certified or equivalent. Ground-mounted arrays may be no taller than 20 feet at full tilt, roof or wall arrays no taller than the district allows, all must meet accessory-building setbacks, and on-site battery storage must be reported to the county’s Emergency Management Coordinator. A system that cannot meet the rules can seek a variance from the Board of Adjustment.

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

Commercial permits

Business and industrial buildings need the same certificate and a site plan, and many uses go through a conditional use permit or special exception. Data centers became a permitted use in the M-2 district on June 1, 2026, but on September 28, 2026 the Board of Supervisors adopted Resolution 27-10, a 12-month moratorium on the construction of data centers while the Planning & Zoning Commission drafts specific rules.

Short-lived ventures use a different document. A Certificate of Temporary Operation, issued by the Zoning Administrator for $50 ($100 if operations have started), covers enterprises of limited duration that are not permanent businesses; it gives the operator’s and owner’s details and the dates and hours of operation, must be amended if staff, products or hours change, and never allows a permanent structure or earth moving. Recreational cabins are defined as up to 600 square feet and 18 feet tall, with no basement and decks no larger than half the footprint.

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

What comes before the building permit

• Bluffs and steep slopes. Land with a bluff (a rise or drop of 50 feet or more averaging 45% slope) or steep slopes is in the Bluffland Protection Overlay. Building, grading or clearing there needs Planning & Zoning Commission approval; inside the Bluff Impact Zone, the bluff plus 50 feet beyond its top and 30 feet beyond its toe, it needs a conditional use permit, and new structures are not allowed in the impact zone at all.
• Driveway and address. An Engineer’s Office driveway permit and 911 address.
• Septic and well. Sanitarian permits and siting.
• Floodplain. A floodplain development application to the Zoning office.
• Public wells. The Public Water Well Overlay limits uses within 200 feet of a public water supply wellhead (Zone 1) and from 200 to 500 feet (Zone 2), and its rules override those of the underlying district.
• Airport. Extra rules may apply within 10,000 feet of the Decorah Municipal Airport runway centerline.

Winneshiek County permit costs and fees

Resolution 24-49, passed May 28, 2024 and in force since July 1, 2024, sets two price lists: one for applications filed before construction or a change of use begins, and a higher one for applications filed after. There are no fees for federal, state or local government projects, and a farmhouse certificate is free.

A $300,000 non-farm house applied for before work starts pays $200; the same house applied for after work has begun pays $400. Septic and well permit fees are charged by Environmental Health and are not printed on the county’s pages, and the property owner pays all driveway construction costs.

Trade permits and who may pull them

• Electrical: the county pages describe no electrical permit or inspection program; rural electrical permits and inspections come from the State of Iowa through DIAL.
• Septic and wells: permitted and inspected by Environmental Health, which also runs well testing and well plugging and reconstruction grants under the state Grants to Counties program.
• Plumbing and mechanical: state licensed trades, with no county permit.

Environmental Health also handles nuisance complaints and animal feeding operation matters, and posts state guidance on flooded septic systems and private wells after a flood.

How to get a Winneshiek County building permit

Review, corrections and what causes delay

A certificate lapses if work has not begun within six months (the ordinance prints “six (1) months”) or is not finished within two years of issue, though the Zoning Administrator may grant one extension of up to six months. Sites in the bluffland overlay wait for Commission review or a conditional use hearing, rezonings go to the Board of Supervisors as ordinances, and the county warns that not every lot is a buildable site, which is why it suggests checking septic suitability before buying.

Inspections in Winneshiek County

The county does not inspect construction for building-code compliance; the zoning certificate checks setbacks, density, height and use against the site plan. Environmental Health inspects septic systems and wells under its permits, and wiring is inspected by the state.

For driveways, the Maintenance Superintendent usually phones the applicant to meet at the site, then records whether a culvert is needed and its size, the driveway width, ditch depth, side slopes, sight distance in each direction and how drainage will be handled. No work may begin until the approval comes back, the driveway permit is good for 180 days, and every home and business must have a 911 address: once the driveway is in, the office puts up the blue 911 sign. In the bluffland overlay, no more than one-third of a lot may be bare at any time, erosion controls such as silt fences are required, and an erosion control plan goes to the Zoning Administrator.

Iowa building code

The ordinances Winneshiek County posts include no building code; its Construction Compliance Certificate enforces Zoning Ordinance V, including the floodplain chapter, which requires the lowest floor of a new home, basement included, to be at least 1 foot above the base flood elevation. FEMA’s Community Status Book lists Winneshiek County as participating in the National Flood Insurance Program, which it entered on March 5, 2024; its first and current flood map took effect on February 22, 2024.

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

Winneshiek County permit records and official resources

Certificates and other zoning files are kept by the Zoning office, and septic and well records by Environmental Health; ask Planning & Zoning (563-387-4080) or Environmental Health for copies. Board of Supervisors minutes, which record zoning amendments, rezonings and moratoria, are posted for each weekly meeting.

• Winneshiek County Planning & Zoning
• Zoning Ordinance and Subdivision Regulation V (amended June 1, 2026)
• Zoning fee schedule, Resolution 24-49
• Guidelines to building in the country
• Land division application
• Zoning maps
• Environmental Health
• Engineer’s Office permits
• Driveway permit and 911 address application
• Supervisors’ minutes, June 1, 2026 (data centers in M-2)
• Supervisors’ minutes, September 28, 2026 (data center moratorium)
• Board of Supervisors minutes
• DIAL electrical permits and inspections
• FEMA Community Status Book, Iowa

Winneshiek County permit FAQs

Do I need a permit to build in rural Winneshiek County?

Yes, a Construction Compliance Certificate from the Zoning office for any new building or addition, except farm buildings used for agriculture.

How much does the certificate cost?

$50 under $5,000 of construction, $100 up to $50,000 and $200 above, doubled if work has already started.

Do I need a permit for a new roof or siding?

No. Maintenance that does not enlarge the building is exempt.

How big must a rural building lot be?

At least 1 acre excluding road right of way, and in A-1 only one non-farm home per 35 acres.

Can I build near a bluff?

Only with Commission approval in the bluffland overlay, and no new structures within the Bluff Impact Zone.

Who gives me a 911 address?

The County Engineer’s Office, on the same application as the driveway permit.

Can a data center be built in Winneshiek County now?

No. A 12-month moratorium on data center construction was adopted on September 28, 2026.

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