Administrative overview · FIPS 20091
Johnson County permit authority
The first compliance decision is jurisdictional: identify the office with statutory authority over your parcel, then use its filing and inspection sequence to keep the project moving.
Jurisdictional status
County
This county profile is the primary starting point for unincorporated-area permitting.
Responsible agency
Johnson County Planning, Housing and Community Development - Building Codes
For a project in or near Johnson County, this office is the identified point of contact for permit intake, statutory code enforcement, plan review coordination, and inspection release conditions. Confirm the parcel’s boundary and project type before relying on the county lane.
Direct contact
913-715-2200 (Option 1 for permits); 913-715-2200 general Building Codes; 913-715-2204 Building Official
Call before mobilizing if the project has a boundary, occupancy, fire, septic, or utility question.
Permit counter
Johnson County Administration Building, 111 South Cherry Street, Suite 2000, Olathe, KS 66061
Operating hours
N/A. The official Building Codes pages publish contact information but do not state public counter hours.
Review expectation
Approximately 7-10 business days for residential permits and 10-14 business days for commercial permits, assuming complete submissions.
Compliance workbench
Choose the next project decision.
Apply online
Open the verified digital gateway, application form, and review timeline.
Open guide →Fees & penalties
Understand fee schedules, enforcement exposure, and stop-work liabilities.
Open guide →Codes & exemptions
Read the code framework, minor-work exemptions, and inspection lane.
Open guide →Agency website
Visit the primary public source for current notices and contact changes.
Open guide →Source trail
Official sources for this profile
Use these direct agency or licensing links to confirm current instructions before you file, pay, or schedule work. External pages control if their information differs from this directory.
Project questions
Frequently asked questions for Johnson County
Who handles permitting for this jurisdiction?
Johnson County Planning, Housing and Community Development - Building Codes is the identified county-level authority for this profile. Confirm that the property is in its service area before filing.
How should I begin an application?
Begin with the online permit gateway listed in the application guide. If the portal does not recognize the address or project type, contact 913-715-2200 (Option 1 for permits); 913-715-2200 general Building Codes; 913-715-2204 Building Official.
How long might review take?
Approximately 7-10 business days for residential permits and 10-14 business days for commercial permits, assuming complete submissions.
How are inspections scheduled?
All county building permits require inspections. Submit requests through MGOConnect or call 913-715-2200; approved plans must be on site. Concrete inspections require at least 2 hours’ notice on the day of the pour; other inspections require at least one-half day’s notice. Only concrete and homeowner-occupied projects receive set times. Inspection requests also may require prior entrance-permit and septic/environmental final reports before final building inspection.
Which codes and exemptions should I review?
For unincorporated Johnson County in 2026, the county’s 2018 Code of Regulations adopts the 2018 International Residential, Building, Fire, Mechanical, Plumbing, Fuel Gas, Energy Conservation, Existing Building, Swimming Pool and Spa, and Property Maintenance Codes, plus 2009 ICC A117.1, 2014 ICC 500, and NFPA 70 (National Electrical Code 2017). The county also publishes project-specific amendments and requirements. Minor repair and maintenance such as carpeting, painting, wallpaper, replacement of receptacles, replacement of previously installed fixtures, vanities, and cabinetry generally does not require a permit. A residential accessory building under 200 square feet does not require a building permit, although setback rules still apply. A residential or commercial fence under 7 feet does not need a building permit, but Planning must be contacted for area-specific requirements. All decks, roofs, new structures, and most enlargement, alteration, repair, moving, demolition, and trade-system work require permits.