Administrative overview · FIPS 47187
Williamson 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
Williamson County Building Codes Division / Codes Compliance Department
For a project in or near Williamson 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
615-790-5718 (Building Codes); 615-790-5736 (Codes Compliance); 615-790-5725 (plan-review intake)
Call before mobilizing if the project has a boundary, occupancy, fire, septic, or utility question.
Permit counter
Williamson County Building Codes, 1320 West Main Street, Suite 400, Franklin, TN 37064
Operating hours
Monday-Friday, 8:00 AM-4:30 PM
Review expectation
N/A; the county describes email notices for acceptance, corrections, review completion, or approval but publishes no fixed plan-review timeline.
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 Williamson County
Who handles permitting for this jurisdiction?
Williamson County Building Codes Division / Codes Compliance 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 615-790-5718 (Building Codes); 615-790-5736 (Codes Compliance); 615-790-5725 (plan-review intake).
How long might review take?
N/A; the county describes email notices for acceptance, corrections, review completion, or approval but publishes no fixed plan-review timeline.
How are inspections scheduled?
The applicant is responsible for passing inspections. County inspections include footings, foundation, slab, slab plumbing when applicable, framing, mechanical, plumbing, insulation, final building/certificate of occupancy, and stormwater. Schedule through the electronic plan-review system or call 615-790-5718; re-inspections carry an additional $50 fee.
Which codes and exemptions should I review?
Williamson County's official adopted-codes page lists the 2021 International Building Code, 2021 International Residential Code with the county's stated exclusions, 2021 International Plumbing Code, 2021 International Mechanical Code, and the 2018 International Energy Code using 2009 tables under Tennessee Rule 0780-02-23-.02, effective September 30, 2024. Educational, daycare, and large-assembly occupancies require Tennessee State Fire Marshal approval before county permitting. The county's zoning ordinance requires a building permit before locating, erecting, constructing, reconstructing, extending, converting, or structurally altering a building or structure in the county's jurisdiction. The official forms page provides an agricultural-exemption form and deck-construction guidance, but no complete minor/cosmetic exemption list; confirm repairs, reroofing, accessory structures, fences, and trade work with Building Codes.