St. Louis Region
Jefferson County building permits use the Citizen Portal
Jefferson County Code Enforcement uses its Citizen Portal for building-permit applications, inspections, contractor licenses, and payments.
For Jefferson County building paperwork, the county’s Citizen Portal is the front door when the county is the right office. That can matter for a deck, accessory building, remodel, contractor license, inspection request, or permit payment.
The portal does not answer every jurisdiction question by itself. A city address may still need city steps. A county address may involve other departments, depending on the work.
The practical move is to confirm the property location first. Then use Jefferson County’s Code Enforcement permit page for county building permits, inspection scheduling, payment instructions, and status checks. Keep the permit number handy once you have one; it is the thread that ties the online record, inspection, and payment trail together.
References
More from Jefferson County: browse every local note for the county.
Last checked against the sources above: July 16, 2026.