Call (865) 737-4194. Calls answered 24/7. To request an estimate, use the form on /quote.
Don't worry! Your installation professional can go over these points with you at the estimate. But here are some things to keep in mind to help you plan ahead.
Which fence rules apply in Karns?
Karns is an unincorporated community in Knox County, listed by the U.S. Census Bureau as Karns CDP. It is not its own city. Most lots sit in unincorporated Knox County, so the Knox County Zoning Ordinance applies. Some nearby lots can sit inside Knoxville city limits. A Knoxville mailing address does not always mean city rules. Check the parcel on KGIS before choosing a height or a placement.
If the lot is in unincorporated Knox County, the Knox County Zoning Ordinance applies (https://knoxplanning.org/resources/zoning/ordinances/county/2026-02-17.pdf):
- In a required front yard, no fence, wall, hedge or yard ornament may materially impede vision across the yard above 3½ feet (§ 3.20.04.B).
- On a corner lot where front and side yards are required, nothing may obstruct vision between 2½ and 10 feet above the crown of the adjacent roadway within the visibility triangle (§ 3.20.04.A).
Knox County Codes Administration can tell you whether your fence needs a permit (https://www.knoxcounty.org/codes/).
If KGIS shows the lot inside the City of Knoxville, City zoning applies instead — including lot-boundary, height, easement and sight-distance rules in Art. 10, §§ 10.3.L and 10.1.E–F (https://knoxplanning.org/resources/zoning/ordinances/city/2025-11-25.pdf). Confirm with the City of Knoxville before you build.
Before you build in Karns
- City or county? Confirm the jurisdiction on KGIS first.
- Front yard and corners. In unincorporated Knox County, keep front-yard fences low or open, and keep corner sight lines clear.
- Know your lines. A deed, plat or survey shows where the boundaries and easements are before the posts go in. See the property-line and survey guide.
- HOA and covenants. If the street has a homeowners association or private covenants, those rules can be stricter than county zoning. Bring the sheet to the on-site estimate.
- Call 811. Tennessee law requires notice through the one-call service before digging (Tenn. Code Ann. § 65-31-106). Call 811 or 1-800-351-1111 so utility-owned lines can be marked.
Fence types for Karns yards
- Wood privacy fence: full privacy for a back lot.
- Vinyl privacy fence: privacy without staining or sealing.
- Chain link: a simple, see-through boundary for pets.
- Aluminum: an open style that works with front-yard view and sight-line rules.
- Gates: walk and drive gates to match the fence.
- Repair: leaning posts, broken panels and sagging gates.
Wondering what goes into the cost? See the fence cost guide. Also nearby: fence installers in Hardin Valley and Powell.
Questions
How tall can a front-yard fence be in Karns?
If the address is in unincorporated Knox County, the Knox County Zoning Ordinance says a fence in a required front yard may not materially impede vision across the yard above 3½ feet (§ 3.20.04.B). An open style, or a solid fence 3½ feet or lower, can fit that rule. Confirm the jurisdiction on KGIS first.
What are the corner-lot fence rules in Knox County?
Under § 3.20.04.A of the Knox County Zoning Ordinance, on a corner lot where front and side yards are required, nothing may obstruct vision between 2½ and 10 feet above the crown of the adjacent roadway within the visibility triangle.
Do I need a permit for a fence in Karns?
If the lot is in unincorporated Knox County, check with Knox County Codes Administration for your parcel before you build. If KGIS shows the lot inside Knoxville city limits, City of Knoxville rules apply instead.
How do I get a price for a fence in Karns?
Call (865) 737-4194 or request an estimate. Your local installer measures the line and checks the height, easement and sight-line rules that apply to the Karns lot.