Administrative overview · FIPS 29165
Platte 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
Platte County Planning & Zoning / Building Department
For a project in or near Platte 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
816-858-3338
Call before mobilizing if the project has a boundary, occupancy, fire, septic, or utility question.
Permit counter
Platte County Administration Building, 415 Third St., Room 016, Platte City, MO 64079
Operating hours
8:00 AM-5:00 PM, Monday-Friday; closed county holidays
Review expectation
N/A; applications are reviewed in the order received after all required documents are uploaded.
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 Platte County
Who handles permitting for this jurisdiction?
Platte County Planning & Zoning / Building Department 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 816-858-3338.
How long might review take?
N/A; applications are reviewed in the order received after all required documents are uploaded.
How are inspections scheduled?
Request inspections through the county online portal account, by emailing inspection@co.platte.mo.us, or by calling 816-858-3338. Published inspection stages include footing, prebackfill, ground rough, rough-in, and final inspections.
Which codes and exemptions should I review?
2018 International Building Code, 2018 International Residential Code, 2018 International Plumbing Code, 2018 International Mechanical Code, 2018 International Fuel Gas Code, 2018 International Energy Conservation Code, 2018 International Swimming Pool and Spa Code, 2017 National Electrical Code, Platte County Zoning Ordinance as amended, Platte County Subdivision Regulations as amended, and National Green Building Standard ICC 700-2008. Ordinary repairs that do not cut structural members or affect required egress, and do not alter regulated plumbing, electrical, gas, mechanical, drainage, or similar systems, do not require application under the county's published guidance. Ordinary repairs do not include structural or life-safety changes.