Johnson County’s Planning, Development and Sustainability Department, in the county Administration Building at 913 South Dubuque Street in Iowa City, permits and inspects construction in the unincorporated county through its Building Services staff (319-356-6085), with applications, inspection requests and fees online through the county’s permit portal. Johnson County’s rural policy is protective of agricultural land, and that policy shows up in its zoning rather than in its building code.
The pressure is real. A university city, a fast-growing corridor at Coralville and North Liberty, and the medical campuses have all pushed development outward, and the county's response has shaped where acreage housing may go and on what terms. The building code question is the ordinary Iowa one — what the county has adopted under chapter 103A, with the statewide energy, fire, plumbing and electrical provisions applying regardless.
This guide covers unincorporated Johnson County. Iowa City, Coralville, North Liberty, Tiffin, Solon and Swisher permit their own construction inside their limits.
The zoning is the constraint, not the code. Johnson County's rural policy is protective of agricultural land, and it is expressed through zoning rather than through the building code. On a rural parcel the question of whether a dwelling is permitted at all, and at what density, is answered by the county's land use regulation — long before any question about how it should be built.
What requires a building permit in Johnson County?
In Johnson County the questions are what has been adopted locally, what applies whether or not it has been, and the county's adopted code and its rural zoning policy.
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- Construction, alteration, repair, demolition or change of occupancy in unincorporated territory
- Zoning and subdivision approval from the county, which is the binding constraint on rural land
- A statement of compliance with applicable energy conservation requirements, on every application except a one- or two-unit residential remodel
- New buildings, additions and structural work on an existing building
- Alterations, repairs and renovations, and any change of occupancy
- Decks, accessory structures above the local threshold, retaining walls and swimming pools
Often exempt
- Ordinary repairs and small accessory work below the county's adopted threshold, and one- and two-unit residential renovation from the energy statement requirement
- Ordinary repairs that do not alter structure, egress or systems
- Painting, papering, flooring, cabinets and similar finish work
- Small accessory structures below the locally adopted threshold — zoning still applies
- Renovation and remodelling of one- and two-unit residential buildings, from the energy statement requirement
What is local, and what applies regardless
The general building code is Johnson County's choice. It may adopt the state code by ordinance, adopt something else, or adopt nothing; where it adopts the state code it may also adopt its own administrative and enforcement provisions, establish a building department and designate a building official. What is not its choice is the statewide core: the energy conservation requirements, which apply to all commercial construction and to new one- and two-family residences whether or not a local code exists; the state fire code, enforced by the State Fire Marshal with local fire departments acting under agreement; and the state plumbing and electrical codes. Beyond those, the county's protective rural zoning and the development pressure from the university corridor.
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
Who handles permitting in Johnson County?
Planning, Development and Sustainability is the permitting authority for unincorporated Johnson County, enforcing the code the county has adopted alongside its zoning and subdivision regulation. The cities permit inside their own limits, the Building Code Bureau maintains the state code, the trades are licensed at state level, and the State Fire Marshal retains its own jurisdiction.
Not sure this scope needs a permit?
Get a free quote →| Detail | Information |
|---|---|
| Department | Johnson County Planning, Development and Sustainability |
| Office | Johnson County Administration Building, 913 S Dubuque Street, Iowa City, IA 52240 |
| Phone | Building Services (319) 356-6085; planning and development (319) 356-6083 |
| Hours | Monday to Friday, 8:00 am to 4:30 pm; closed Tuesdays 8:15 to 9:30 am for a staff meeting |
| Scope | Unincorporated Johnson County; the cities permit their own |
| Energy statement | Required with the permit application |
In 2025, building permits issued in unincorporated Johnson County authorized 57 new privately owned housing units, all of them single-family homes, according to the U.S. Census Bureau Building Permits Survey.
Permit types
Residential permits
A house in unincorporated Johnson County starts with the zoning question, which on agricultural land is the one most likely to determine whether the project happens. Then the building permit against the county's adopted code, the energy compliance statement, and well and on-site wastewater approvals where the parcel is unserved.
Commercial permits
Commercial work in unincorporated Johnson County (farm buildings used for agriculture are outside the county’s building code and zoning under Iowa Code 331.304 and 335.2) clears the county's zoning and subdivision, then plan review against the county's adopted code, with the statewide energy conservation requirements applying to all commercial construction and the State Fire Marshal reviewing within its jurisdiction.
Establishing what applies to the site
In unincorporated Johnson County the Iowa River and Coralville Reservoir bring floodplain review into the file, on-site wastewater governs most rural building, and the county's rural zoning policy shapes where development may go at all.
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Call 1-855-478-4290 →Iowa contractors register with the state licensing department (DIAL), and electricians, plumbers and mechanical contractors hold state licences. Iowa rules
Johnson County permit costs and fees
Fees follow the county's schedule for unincorporated territory, with trade licensing handled at state level.
| Item | Fee or rule |
|---|---|
| Building permit | The county's fee schedule, for unincorporated territory |
| Zoning and subdivision | County approval, the binding constraint on rural land |
| Well and on-site wastewater | Separate approvals where the parcel is unserved |
| Trade permits | Electrical, plumbing and mechanical, each separately |
| Energy statement | Required with the application; no separate fee |
| City permits | Iowa City, Coralville, North Liberty and the others issue their own |
Ask about the parcel before buying it. Where a county's rural policy is deliberately protective, a parcel's development potential is not implied by its size or its road frontage. The zoning answer comes from the county, it comes free, and it comes before a purchase — which is a great deal cheaper than discovering it afterwards.
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Get a free quote →Trade permits and who may pull them
Permit required
- Unserved parcels — well and on-site wastewater approvals alongside the building permit
- Electrical — separate permit from the city or county, or from DIAL where there is no local electrical inspection; state-licensed electrician
- Plumbing — separate permit under the plumbing code the jurisdiction enforces; state-licensed plumber
- Mechanical — separate permit under the mechanical code the jurisdiction enforces; state-licensed mechanical contractor
- Fire protection — under the state fire code, enforced by DIAL’s fire safety bureau, or under a local fire code the state recognises
Typically exempt
- Like-for-like replacement the applicable trade code places below the permit threshold
- Work a property owner performs on their own residence, where the jurisdiction allows it
Trade work is permitted separately under state codes that apply across Iowa. Iowa rules
How to apply for a Johnson County building permit
The state code, another code, or none at all — though a city of more than 15,000 people must enforce at least the state code.
Energy conservation, accessibility, the state fire code and the state plumbing, mechanical and electrical codes run statewide.
Zoning and subdivision are local in every case and precede the building permit.
DIAL contractor registration, state trade licences, and any local registration for general contractors.
Required on every building permit application except one- and two-unit residential remodelling.
Footing to final, with the trades on their own permits, then the certificate of occupancy.
Want this handled start to finish?
Get a free quote →Review, corrections and what actually causes delay
Johnson County reviews unincorporated work against its adopted code, with rural zoning as the substantive question. What delays a project here is a parcel bought on an assumption about its development potential, and a missing energy compliance statement.
Inspections in Johnson County
Inspections follow the sequence of the code the jurisdiction has adopted — footing, foundation, framing, rough trades, insulation and final — requested from the local building department by permit number, with the trades inspected on their own permits. Work that passes final receives a certificate of occupancy for new buildings and changes of occupancy. Johnson County inspects the work it permits in the sequence its adopted code sets, with the trades inspected on their own permits; inside the cities, inspection is theirs.
Johnson County permit search and official resources
- Johnson County Planning, Development and Sustainability — the department, its zoning and its permitting
- Iowa DIAL Building Code Bureau — state plan review and the list of local code enforcement
- Iowa Code chapter 103A — the statute leaving general code adoption to local discretion
- 481 IAC chapter 280 — the state fire code (International Fire Code, 2024 edition, with Iowa amendments)
- 481 IAC chapter 301 — state building code — the codes adopted by reference and the state’s amendments
- Iowa Code chapter 103A — the statute leaving general code adoption to local discretion
Inspections are where schedules slip.
Get a free quote →Frequently asked questions
Does the county permit inside Iowa City?
No. Iowa City, Coralville, North Liberty and the county's other cities permit inside their own limits.
Can I build a house on any rural parcel?
Not necessarily. The county's rural zoning is protective of agricultural land, and whether a dwelling is permitted at all is a zoning question answered before any building question.
What is the energy compliance statement?
A statement that the construction will comply with all applicable energy conservation requirements, required on every Iowa permit application except a one- or two-unit residential remodel.
Which code does the county enforce?
The code Johnson County has adopted; under Iowa Code chapter 103A each jurisdiction chooses its own.
Do I need a well and wastewater approval?
On unserved parcels, yes — both are separate approvals alongside the building permit.
Which Johnson County is this?
Johnson County in eastern Iowa, containing Iowa City. The Johnson Counties elsewhere in the country are unrelated jurisdictions.
Simplify Johnson County permitting with Alliance Permitting
Johnson County decides rural projects at the zoning stage and means it. We get the parcel's position in writing before anyone commits to buying it.
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Send us the scope and the parcel. We confirm the review path with the Johnson County Planning, Development and Sustainability Department, assemble the submittal, file it, and track it through issuance — corrections included.
More Iowa permitting guides
More Iowa permitting guides
This guide is provided by Alliance Permitting for general information about Johnson County permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.