Administrative overview · FIPS 47173
Union 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
State Fallback
This profile identifies a handoff outside the county’s ordinary structural permitting lane.
Required jurisdiction check
Confirm the controlling local or state authority before filing.
The record is marked State Fallback. That means the county profile should be treated as a routing brief: incorporated municipalities, a state building department, or a state fire marshal may control plan review, permits, and inspections. Contact the named agency below and verify the parcel’s jurisdiction before paying a fee or scheduling field work.
Responsible agency
Union County Assessor of Property / Tennessee State Fire Marshal's Office
For a project in or near Union 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
Union County Assessor 865-992-3211; Tennessee State Residential Building Code Enforcement 615-741-7170
Call before mobilizing if the project has a boundary, occupancy, fire, septic, or utility question.
Permit counter
Union County Assessor of Property, 901 Main Street, Suite 106, Maynardville, TN 37807
Operating hours
Monday-Friday, 8:00 AM-4:00 PM for courthouse offices
Review expectation
N/A; no county review timeline was published.
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 Union County
Who handles permitting for this jurisdiction?
This record is marked State Fallback. Confirm whether a city, state agency, or other local authority controls the parcel 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 Union County Assessor 865-992-3211; Tennessee State Residential Building Code Enforcement 615-741-7170.
How long might review take?
N/A; no county review timeline was published.
How are inspections scheduled?
Purchase the applicable permit in person at the Union County Assessor's office. When the state residential program applies, request inspections through https://core.tn.gov or email SFMO.permits-licensing@tn.gov with the complete permit number and requested inspection date. Septic permits are handled through TDEC; the county directs applicants to the Knoxville Field Office at 865-594-6035 or TDEC's online septic service.
Which codes and exemptions should I review?
Union County's official Assessor page directs applicants to Tennessee State Building Codes and confirms the county sells building permits. For the state residential program, Tennessee identifies the 2018 International Residential Code and 2018 International Energy Conservation Code; electrical permits and inspections are handled through the state system. Confirm any municipal code requirements inside Luttrell, Maynardville, or Plainview. Under Tennessee's state residential program, additions over 30 square feet to existing homes require a permit; detached garages, sheds, barns, and other detached structures not used for living generally do not require a state residential building permit; manufactured or modular-home installation itself generally does not require one, but custom site work such as a deck, patio, or stoop may. Union County's in-person permit requirement still applies to covered new construction; confirm exemptions with the Assessor or state program before work begins.