Iowa State Building Code: Adoption, Plan Review, and Inspections

The Iowa State Building Code sets minimum standards for construction, fire protection, energy efficiency, and accessibility, but it does not apply the same way everywhere in the state. Whether you must build to it depends on where your project sits, who owns or funds it, and whether your city or county has adopted the state code or its own equivalent. The Building Code Bureau inside the Department of Inspections, Appeals, and Licensing runs state-level plan review and inspection; local building departments handle most everything else.

Where the Code Applies

Iowa’s constitution gives cities and counties home rule authority, so most building regulation runs locally. Under Iowa Code 103A.10, the state building code applies in two situations: in any governmental subdivision that has passed an ordinance accepting it, and in any city with a population over 15,000 that has not adopted a local code substantially consistent with nationally recognized standards.¹ Cities above that threshold without their own qualifying code must enforce the state version.

In rural areas and smaller communities that have neither adopted the state code nor passed their own, there may be no mandatory building code enforcement for private construction at all. Before you start, call your city or county building department and ask what code they enforce and what permits you need.

One rule applies statewide no matter what the local jurisdiction has done: the energy conservation requirements adopted by the state building code commissioner apply to all new construction started on or after July 1, 2008.¹

Which Code Editions Are Currently In Force

Iowa has moved past the 2015 editions it used for several years. As of late 2025, the state has adopted the 2024 International Building Code, the 2024 International Residential Code, the 2024 International Existing Building Code, and the 2024 International Fire Code.² The state also maintains its own State Plumbing Code and State Electrical Code, which govern water systems and wiring methods separately from the ICC family.³

Confirm which edition your local jurisdiction enforces. Some cities and counties operate under older editions until they formally adopt an update, even though state-level plan reviews apply the versions the state has adopted.

Projects That Must Go to the State for Plan Review

Certain projects must be submitted to the Building Code Bureau for plan review regardless of what local enforcement exists:

Buildings owned by the state or a state agency, including university buildings and administrative offices.
Any new building financed with state funds.
Licensed healthcare facilities, including hospitals and nursing homes, as listed under Iowa Administrative Rules 481, Chapter 280.
Assisted living facilities, residential care facilities, elder group homes, and adult day service facilities.

The Building Code Bureau also holds exclusive authority over fire alarm, fire sprinkler, and fire suppression plan reviews for state-owned buildings and healthcare facilities, even in jurisdictions with their own fire code enforcement.³

K-12 school buildings follow a different rule. Plans should go to the Building Code Bureau unless they have already been submitted to an approved local code enforcement department.³ Local enforcement gets first option; the state steps in where no approved local program exists.

How to Submit Plans and What They Must Contain

The Building Code Bureau accepts plan review submissions through the Iowa ImageTrend License Management System. You create an account or log into an existing one to start.⁴

Plans must be wet-signed, sealed, and labeled as 100% construction sets. Preliminary plans or anything marked “not for construction” will be rejected. For digital copies, email the bureau at buildingcode@dia.iowa.gov with your project number and name to request an upload link. After you upload, notify the assigned plan reviewer directly. Review does not begin until fees are paid and the bureau has been notified that plans are uploaded.⁴

Construction documents must be signed and sealed by an Iowa-licensed architect or professional engineer. For buildings exceeding 100,000 cubic feet of heated or cooled enclosed space, that licensed architect or engineer must also sign a statement confirming the design complies with applicable energy efficiency standards.⁵ Every application must include a statement that construction will comply with all applicable energy conservation requirements.

Plan Review and Fire Protection Fees

The Building Code Bureau calculates plan review fees from the estimated construction cost. Under Iowa Administrative Code Chapter 481-300.4:

Projects up to $1 million: $0.58 per thousand dollars of estimated construction cost, with a $200 minimum.
Projects over $1 million: $580 for the first million, plus $0.32 per additional thousand.

Fire protection system fees are based on the cost of materials and installation:

Up to $5,000: $100
$5,001 to $20,000: $200
Over $20,000: $400

These tiers apply identically to fire suppression and fire alarm systems, so a project with both pays two separate fees.⁶ Payment by money order, check, or draft payable to the Treasurer, State of Iowa must accompany the plans when submitted.

Inspections and Certificates of Occupancy

State inspectors handle new buildings and additions in four situations: the building is state-owned, the construction is financed by a state agency, the local jurisdiction has adopted the state building code, or the project is K-12 construction funded by the SAVE program in an area without locally adopted and enforced building code.³ For everything else, local building departments inspect.

Extra inspection fees apply if a code violation found during a basic inspection requires a follow-up visit, if the inspector arrives and the project is not ready for the inspection type requested, or if the designer, contractor, or owner requests inspections beyond the three basic ones. If inspection fees are unpaid at the final inspection, only temporary approval of occupancy will be granted.³

Under Iowa Code 103A.19, local building departments have authority to issue certificates of occupancy, which certify that a building constructed under the state building code complies with applicable provisions.⁵

Manufactured and Factory-Built Homes

Factory-built structures operate under their own rules in Iowa Code 103A.9. Any factory-built structure manufactured in Iowa after the code’s effective date must comply with the state building code, and structures manufactured out of state must comply before installation here.⁷ The commissioner issues an insignia of approval that must be displayed on compliant structures before installation. Nobody can modify a factory-built structure before or during installation without the commissioner’s prior approval.

If you own a manufactured home built to federal standards and you’re moving it from one lawful location to another, a city or county cannot require you to renovate it to meet the state or local building code, unless you’re renting it out for occupancy.⁷

Installation rules sit in Iowa Administrative Code 661-322.11. Homes manufactured on or after October 20, 2008, must be installed according to the manufacturer’s recommendations and the federal Model Manufactured Home Installation Standards at 24 CFR Part 3285, with specific pier spacing, concrete foundation minimums, and ground anchor load requirements.⁸

Civil penalties for manufactured home violations run up to $1,000 per offense, with each home or each separate failure counting as a separate violation. The annual cap for a series of violations is $1 million.⁹

Accessibility Rules for Public Buildings

Buildings and facilities open to the public must meet accessibility requirements in Iowa Administrative Code Chapter 302, which adopts the federal Americans with Disabilities Act Accessibility Guidelines (ADAAG) by reference across facility types including restaurants, medical care facilities, business and retail spaces, libraries, and transient lodging. Individual rules apply specific ADAAG chapters to each facility category, with some Iowa-specific amendments. Hospitals, for example, must make all patient bedrooms, toilets, and common areas accessible, and long-term care facilities face the same across-the-board requirement.¹⁰

Under Iowa Code 103A.7, these rules must stay consistent with federal accessibility standards and apply to buildings subject to Iowa Code Chapter 104A.⁷

If You Disagree With a Decision

Iowa Code 103A.16 gives you the right to appeal to a board of review if a state agency or local building department rules, determines, or orders something you want to challenge under the state building code. You can also appeal if your construction application or plans are disapproved, or if the reviewing authority fails to act on them within 60 days of submission.⁷

If the board rules against you, you can petition the Building Code Advisory Council before the board’s decision takes effect. Board decisions must state an effective date no earlier than five days after issuance, so the window is narrow. The advisory council reviews both facts and law and must issue its decision within ten days of receiving the appeal.⁷

Court is available after that, but Iowa Code 103A.18 requires you to exhaust all administrative remedies first. Courts will not hear a building code case unless you’ve been through the board of review and advisory council process, with limited exceptions for actions brought by the state itself or situations where there’s good cause for skipping the administrative steps.⁷

Penalties for Building Out of Compliance

Violating the state building code or ignoring a lawful order from a local building department is a simple misdemeanor under Iowa Code 103A.21. The statute reaches owners, builders, architects, contractors, subcontractors, construction superintendents, and anyone else involved in constructing or using a building in violation of the code. A written order to correct gives you 30 days to comply, or whatever longer period the local building department sets.¹¹

Instead of pursuing criminal charges, the building code commissioner can petition district court for an injunction to stop the violation. The commissioner also has authority to pursue injunctive relief for violations of Chapter 104A, which covers accessibility.¹¹

Local building departments can order corrections in writing under Iowa Code 103A.19. Orders can be served personally or by certified mail to the address listed on the original construction application. The local department has discretion to grant reasonable additional time for compliance.⁵

1
Iowa Legislature. Iowa Code 103A.10 – Effect and Application
2
International Code Council. Iowa – ICC Adoptions Map
3
Department of Inspections, Appeals, & Licensing. Building Code Plan Review
4
Department of Inspections, Appeals, & Licensing. How Do I Submit a Construction Plan Review
5
Iowa Legislature. Iowa Code 103A.19 – Administration and Enforcement
6
Iowa Legislature. Iowa Administrative Code Chapter 481-300 – State Building Code Administration
7
Iowa Legislature. Iowa Code 103A – State Building Code
8
Cornell Law Institute. Iowa Code r. 661-322.11 – Support and Anchorage
9
Iowa Legislature. Iowa Administrative Code Chapter 481-324 – Manufactured or Mobile Home Retailers, Manufacturers, and Distributors
10
Iowa Legislature. Iowa Administrative Code Chapter 302 – Accessibility of Buildings and Facilities Available to the Public
11
Iowa Legislature. Iowa Code 103A.21 – Penalty