Do you need a fence permit in Knoxville or Knox County — and how tall can the fence be?

Educational guide only. This page is general information, not legal advice. It summarizes publicly available zoning, permit, and pool-barrier documents for homeowners in the Knoxville area (Knox, Blount, and Anderson counties). Rules can change, and every lot is different. Before you build, confirm the current permit, height, easement, sight-distance, and pool-barrier rules with the city or county office that has jurisdiction over your address. A homeowners association or other private covenant, if you have one, is a separate set of rules.

Marble City Fence Co. installs and repairs residential fences in Knoxville and nearby towns. Phone (865) 737-4194. Calls answered 24/7.

Quick answer: Which fence rules apply to your lot?

Permit and height rules follow the city or county with jurisdiction over the parcel, not just the town name on the mailing address. For a Knox County address, look the parcel up on KGIS to see whether it is inside the City of Knoxville or in unincorporated Knox County. Then confirm the current rules with that codes office.

Source: KGIS parcel maps — https://www.kgis.org/KGISMaps/

Quick answer: Do you need a permit in the City of Knoxville?

In the City of Knoxville, the zoning code says a building permit may be required for the construction of an accessory structure, per the Building Code. That text does not state a simple yes-or-no rule for every fence. Ask the City of Knoxville Plans Review and Inspections office whether your fence needs a permit before work starts.

Source: City of Knoxville Zoning Ordinance, Article 10, § 10.3.A.2 — https://knoxplanning.org/resources/zoning/ordinances/city/2025-11-25.pdf

Quick answer: How tall can a fence be in Knoxville?

In Knoxville, privacy fences and walls are limited to 42 inches from five feet behind the front building line to the front lot line, and in the corner side yard. A through-lot rear can have that 42-inch limit when closer than the setback rule. Open fences have no height limit there. Other yards have no height limit in that section.

Source: City of Knoxville Zoning Ordinance, Article 10, § 10.3.L — https://knoxplanning.org/resources/zoning/ordinances/city/2025-11-25.pdf

Quick answer: What about unincorporated Knox County?

Unincorporated Knox County zoning does not set a blanket maximum fence height. It limits visibility: in a required front yard, a fence may not materially impede vision above 3½ feet, and corner lots have a visibility-triangle rule. Whether a permit is required is not a yes or no on this page — check with Knox County Codes Administration before you build.

Source: Knox County Zoning Ordinance § 3.20.04 (as amended through February 17, 2026) — https://knoxplanning.org/resources/zoning/ordinances/county/2026-02-17.pdf. Codes Administration — https://www.knoxcounty.org/codes/

First: confirm which office has jurisdiction

A street in "West Knoxville," "Fountain City," "Halls," "Karns," "Powell," or "Hardin Valley" can sit inside the City of Knoxville or in unincorporated Knox County. The rules are not the same. For Knox parcels, open KGIS, find the address or parcel, and see which jurisdiction is listed. Then use the matching section below and reconfirm with that office.

Source: KGIS — https://www.kgis.org/KGISMaps/

Town pages for nearby communities include Maryville, Oak Ridge, Farragut, Powell, Hardin Valley, Clinton, and Alcoa. This guide is about permits and height, not a substitute for the local codes office.

City of Knoxville

Permit

The City of Knoxville zoning code's general rules for accessory structures state: "A building permit may be required for the construction of an accessory structure, per the Building Code." This page does not invent a height or type of fence that always, or never, needs a city permit. Confirm your project with City of Knoxville Plans Review and Inspections before work starts.

Source: City of Knoxville Zoning Ordinance, Article 10, § 10.3.A.2 — https://knoxplanning.org/resources/zoning/ordinances/city/2025-11-25.pdf

Plans Review information: https://permits.knoxvilletn.gov/Plans-Review-Permits

Height — front, corner side, through-lot rear, and other yards

Under Article 10, § 10.3.L (Fences and Walls):

From five feet behind the front building line forward to the front lot line, and in the corner side yard, privacy fences and walls are limited to 42 inches.
On a through-lot rear, fences are limited to 42 inches when closer than the front setback for the designated zoning district, or the average of the blockface for existing principal buildings numerically addressed along the parallel street, whichever is greater.
Open fences do not have a height limit in those locations.
There is no limit on the height of privacy fences, walls, or open fences in other yards.
Fences may be constructed at the boundaries of a lot without setback, except for the required visibility triangle.

Source: City of Knoxville Zoning Ordinance, Article 10, § 10.3.L — https://knoxplanning.org/resources/zoning/ordinances/city/2025-11-25.pdf

"Open fences" is the term used in the ordinance. This page does not add a separate definition. If it is unclear whether a planned fence is a privacy fence or an open fence under the code, ask Plans Review.

Some special or form-based zoning districts have their own fence standards. Confirm the zoning district on KGIS and with Plans Review.

Corner lots and sight distance

Sight-distance rules are easy to miss on a corner lot or near an intersection.

City of Knoxville: Developments near intersections must provide for adequate sight distance, as approved by the City of Knoxville Department of Engineering. Fences at a lot boundary still have to respect the required visibility triangle (§ 10.3.L). Source: City of Knoxville Zoning Ordinance, Article 10, § 10.1.F and § 10.3.L — https://knoxplanning.org/resources/zoning/ordinances/city/2025-11-25.pdf
Unincorporated Knox County: On a corner lot where front and side yards are required, no wall, fence, sign, structure, plant growth, or other object that obstructs vision at elevations between 2½ feet and 10 feet above the crown of the adjacent roadway may be placed or maintained within a visibility triangle. In any required front yard, except as provided in that corner rule, no fence, wall, hedge, or yard ornament may materially impede vision across that yard above 3½ feet. Source: Knox County Zoning Ordinance § 3.20.04.A–B (as amended through February 17, 2026) — https://knoxplanning.org/resources/zoning/ordinances/county/2026-02-17.pdf

Other towns and counties have their own visibility language, summarized in the sections below. When in doubt, ask the local engineering or codes office to look at the corner before posts go in.

Easements

Inside the City of Knoxville, permanent structures and accessory structures are prohibited within utility and drainage easements. Stormwater facilities, retaining walls, and fences may be installed at the property owner's risk, subject to the approval of the City Department of Engineering.

Source: City of Knoxville Zoning Ordinance, Article 10, § 10.1.E — https://knoxplanning.org/resources/zoning/ordinances/city/2025-11-25.pdf

In the Town of Farragut, the official FAQ states that fences are not permitted where they would impede the free flow of stormwater, and that fences may be removed without being re-installed if they are placed within utility, drainage, and/or construction easements. The same FAQ says the fence must stay on the owner's property and not within the public right-of-way and/or any pedestrian easement.

Source: Town of Farragut FAQ, "Do fences on a residential lot require a permit?" — https://www.townoffarragut.org/faq.aspx?qid=73

Easement rules outside those two documents are not covered here. Check the recorded plat and the local engineering or codes office for the address.

Unincorporated Knox County

If KGIS (or the county) shows the parcel is outside the City of Knoxville, Knox County zoning applies.

The Knox County Zoning Ordinance regulates fence visibility rather than stating a blanket maximum fence height in § 3.20.04. On a corner lot where front and side yards are required, no fence or other object may obstruct vision between 2½ feet and 10 feet above the road crown inside the visibility triangle. In a required front yard, except as provided in that corner rule, no fence, wall, hedge, or yard ornament may materially impede vision across that yard above 3½ feet.

Source: Knox County Zoning Ordinance § 3.20.04 (as amended through February 17, 2026) — https://knoxplanning.org/resources/zoning/ordinances/county/2026-02-17.pdf

Whether a building permit is required for a standard residential fence in unincorporated Knox County is not stated as a yes or no on this page. Check with Knox County Codes Administration for the property and the work planned.

Source: Knox County Codes Administration — https://www.knoxcounty.org/codes/

Farragut

The Town of Farragut's official FAQ asks, "Do fences on a residential lot require a permit?" and answers: fences up to a maximum of 7 feet in height do not require a building permit. The property owner is responsible for making sure the fence is on the property and not within the public right-of-way and/or any pedestrian easement. Fences are not permitted where they would impede the free flow of stormwater. Fences may also be removed without being re-installed if they are placed within utility, drainage, and/or construction easements. The FAQ's advice on placement is to have a survey conducted so that property boundaries and easements are known. Fences surrounding swimming pools are typically part of a swimming pool permit; for those requirements, contact the Farragut Codes Office.

Source: Town of Farragut FAQ — https://www.townoffarragut.org/faq.aspx?qid=73

The town's "When is a Building Permit Required" handout, citing the 2018 International Residential Code Section R105.2, also lists "Fences not over 7 feet high" among the work that does not require a building permit, and notes that an exemption from a permit is not permission to violate other town laws or ordinances.

Source: Town of Farragut, When is a Building Permit Required — https://townoffarragut.org/DocumentCenter/View/5176/When-is-a-Building-Permit-Required

If the planned fence is taller than that published exemption, or if it will enclose a pool, confirm the project with the Farragut Codes Office. See also the Farragut town page.

Maryville

The City of Maryville's official fence-regulations handout states that owners of single-family and two-family properties that are not located in a historic district may construct a fence without a permit or review, if they follow the regulations in that handout:

A fence taller than 6 feet, measured from the ground to the top of the structure, must meet the minimum setback requirements for accessory structures.
Any fence erected in the front yard shall be no closer than 5 feet from the street right-of-way. Exception: chain link or fence of similar type may extend to the street right-of-way when determined by the City Engineer that no sight-distance problems or safety hazards exist.
It is the responsibility of the property owner to determine the exact location of property lines.
Fences should be free of barbs, spikes, razor wire, electrical wire, and similar safety hazards.

Property owners in Maryville historic districts must prepare an application and receive approval from the City of Maryville Historic Zoning Commission before installing a fence. The same handout states that no vegetation or fence is allowed that prevents persons driving vehicles on public streets or alleys from obtaining a clear view of traffic and/or traffic-control signs and/or devices when approaching any public intersection.

Source: City of Maryville, Fence Regulations — https://www.maryvillegov.com/uploads/8/2/6/7/8267180/fence_regulations_info.pdf

The same handout also reminds owners to make this call before digging. See the 811 section below. See also the Maryville town page.

Alcoa

In the City of Alcoa, the zoning ordinance states that construction, installation, or placement of any fence, regardless of building material, shall require a building permit and proof of property lines. Fences may be erected in the side or rear of a property (behind a line extended from and along the front wall of a house), on the property owner's side of the property line. Fences will be allowed within the required front yard on corner lots when that elevation does not serve as the main entrance to the home (the actual front of the house) and where driver's visibility will not be obscured. No fence shall exceed eight (8) feet in height. Existing pins shall not be removed, and measures must be taken in layout of the fence to ensure they remain. No fence shall restrict the vision of drivers turning on streets or from driveways. There shall be no obstruction to vision. No fence shall be installed or built so as to prevent the natural flow of water or to cause the damming of storm water due to the accumulation of debris. No fence shall be installed or built so as to hinder the operation of a fire hydrant or to prevent access by meter readers and emergency personnel. No fence shall require a vehicle be parked in any street or alley for the purpose of opening a gate before the vehicle can be driven off the street or alley.

Source: City of Alcoa Zoning Ordinance, Chapter 2, Subchapter 2.21, § 14-2.2105(2) — https://www.cityofalcoa-tn.gov/DocumentCenter/View/248/221-General-Provisions-PDF

A separate corner-visibility rule in the same subchapter states that, in all districts except the General Business District, on a corner lot, within the area formed by the centerline of the intersecting streets and a line joining points on those centerlines 75 feet from their intersection, there shall be no obstructions to vision between a height of 3½ feet and a height of 10 feet above the average grade of each street at the centerline. That requirement is not deemed to prohibit any necessary retaining wall.

Source: City of Alcoa Zoning Ordinance, § 14-2.2104 — https://www.cityofalcoa-tn.gov/DocumentCenter/View/248/221-General-Provisions-PDF

Unincorporated Blount County

For land in Blount County outside any municipal limits, the county zoning regulations state: fences less than ten (10) feet in height that are not a part of a site plan required by other sections of that resolution shall be exempt from setback requirements and exempt from building permit, provided that all requirements of Section 7.9 for vision clearance for traffic are met.

Section 7.9 (Vision Clearance for Traffic) states that no use shall be established, nor structure constructed, nor planting established or maintained, that will obstruct the vision of vehicular or pedestrian traffic entering onto or using any adjacent public or private street.

Source: Zoning Regulations of Blount County, Tennessee, § 2.6 and § 7.9 (last amended August 17, 2023) — https://www.blounttn.gov/DocumentCenter/View/27484/Zoning-Regs-08172023

If the parcel is inside Maryville or Alcoa city limits, use those city sections instead, not this county section. Confirm the jurisdiction with the city or with Blount County Development Services.

Oak Ridge

The City of Oak Ridge zoning ordinance (as amended by Ordinance No. 4-2024, effective January 18, 2024) states that structures such as fences, freestanding or retaining walls, and garden walls that are free of barbs, spikes, and similar safety hazards may occupy the front, side, and rear setback requirements of a lot, provided the structure does not impair traffic visibility.

Fences and walls may not exceed four (4) feet in height within the front setback requirement and may not exceed six (6) feet in height within the side and rear setback requirements.
On through lots where the rear property line abuts an arterial street, fences up to six (6) feet in height are permitted within the required setback along the arterial street. The finished side of the fence shall face the public right-of-way.
The height limitation for fences and freestanding walls shall be measured from the lowest adjacent grade, while the height limitation for retaining walls shall be measured from the highest adjacent grade.

The same article states that no structure provided for in that section shall be erected without a Zoning Compliance Permit as required by Section 16.03 of that code, or as provided in that subsection, and that permits for electrical fences shall be issued only in accordance with Section 3.12. It also states that no structures as defined in that article shall be placed on the right-of-way or on any public property.

Source: City of Oak Ridge Zoning Ordinance, § 3.07(e), § 3.08(a), and § 3.08(c) — https://www.oakridgetn.gov/DocumentCenter/View/3551/Zoning-Ordinance-PDF-

Anderson County and Clinton

This page does not state permit or height rules for unincorporated Anderson County or for the City of Clinton. If the lot is in unincorporated Anderson County, check with Anderson County Planning, Building and Codes before building. If the lot is inside the City of Clinton, check with the City of Clinton Codes Enforcement / Zoning office. Do not assume Knox County, Oak Ridge, or any other city's rules apply.

Anderson County Planning, Building and Codes: https://andersoncountyplanning.com/building-and-codes/
City of Clinton Codes Enforcement / Zoning: https://www.clintontn.net/page/codes-enforcement-zoning/

Pool barriers (a short note)

A yard fence and a swimming-pool barrier are not always the same project. Pool-barrier rules are specific, and the documents below should be read in full for the address that applies. This section is only a pointer, not a complete code summary.

City of Knoxville: The city's official Residential Swimming Pool Barrier Guidelines state that the City of Knoxville enforces the barrier requirements of Section 305 of the 2018 International Swimming Pool and Spa Code. The guidelines' checklist states that the top of the barrier shall be at least 48 inches above the surface measured on the side facing away from the swimming pool, and they describe opening limits and self-closing, self-latching gate rules. New construction or installation of a spa, hot tub, inground, or above-ground pool will require a plan review, building permit, and inspections, except for prefabricated swimming pools that are less than 24 inches deep (IRC R105.2), as stated in that handout. Source: City of Knoxville, Residential Swimming Pool Barrier Guidelines — https://www.knoxvilletn.gov/DocumentCenter/View/1731/Residential-Swimming-Pool-Barrier-Guidelines-PDF
Unincorporated Knox County: Knox County's Swimming Pool Responsibility Form states that all outdoor pools and spas must be surrounded by a barrier that restricts access, with a minimum barrier height of 48 inches above grade measured on the side facing away from the pool, and it sets gate rules including self-closing and self-latching devices. Some details in the county form differ from the city's handout. Use the document that applies to the property; do not blend the two. Source: Knox County Codes Administration, Swimming Pool Responsibility Form — https://www.knoxcounty.org/codes/pdfs/SwimmingPoolResponsibilityForm.pdf
Farragut: The town FAQ states that fences surrounding swimming pools are typically part of a swimming pool permit. The town's pool barrier handout states that barriers must comply with Section 305 of the 2018 International Swimming Pool and Spa Code, including a minimum top-of-barrier height of 48 inches above grade measured on the side facing away from the pool. Sources: https://www.townoffarragut.org/faq.aspx?qid=73 and https://www.townoffarragut.org/DocumentCenter/View/5177/Swimming-Pool-Affidavit-and-Barrier-Handout

If the fence will enclose a pool or spa, tell the local codes office that up front and confirm the barrier, gate, and permit requirements for that address.

Call 811 before anyone digs

Call 811 before digging. Tennessee law requires notice to Tennessee 811 at least 3 working days, and not more than 10 full working days, before digging (Tenn. Code Ann. § 65-31-106). Call 811 or file at tenn811.com. A ticket is good for 15 calendar days after its legal start date. 811 notifies member utilities to mark their own lines; private lines, like irrigation, aren't covered. Our crew calls 811 before we dig.

Sources: Tenn. Code Ann. § 65-31-106 — https://law.justia.com/codes/tennessee/title-65/chapter-31/section-65-31-106/ ; City of Maryville, Fence Regulations — https://www.maryvillegov.com/uploads/8/2/6/7/8267180/fence_regulations_info.pdf

Homeowners association rules

A homeowners association's covenants, if a lot is in one, are private rules. They do not replace city or county zoning, permit, easement, or pool-barrier requirements, and they can be stricter than those public rules. This page does not describe any named association. If the property has an HOA or other recorded covenant, read the written fence guidelines and obtain any required written approval before work starts, in addition to checking with the local codes office.

FAQ

Do I need a permit for a fence in the City of Knoxville?

In the City of Knoxville, the zoning code says a building permit may be required for the construction of an accessory structure, per the Building Code (Article 10, § 10.3.A.2). That text does not state a simple yes-or-no rule for every fence. Ask the City of Knoxville Plans Review and Inspections office whether your fence needs a permit before work starts. The official zoning compilation is at https://knoxplanning.org/resources/zoning/ordinances/city/2025-11-25.pdf.

How tall can a fence be in Knoxville — front yard vs backyard?

Under City of Knoxville Zoning Ordinance § 10.3.L, privacy fences and walls are limited to 42 inches from five feet behind the front building line to the front lot line, and in the corner side yard. On a through-lot rear, fences are limited to 42 inches when closer than the front setback or the average blockface, whichever is greater. Open fences have no height limit in those locations. Other yards have no height limit under that section. Fences may be built at lot boundaries except in the required visibility triangle. Official text: https://knoxplanning.org/resources/zoning/ordinances/city/2025-11-25.pdf.

Do I need a permit for a fence in unincorporated Knox County?

This page does not state a yes or no. Knox County zoning (§ 3.20.04) regulates visibility, including a 3½-foot front-yard vision rule and a corner visibility triangle, but it does not, in that section, set a blanket maximum fence height or a clear permit yes-or-no. Check with Knox County Codes Administration before you build: https://www.knoxcounty.org/codes/. Zoning text: https://knoxplanning.org/resources/zoning/ordinances/county/2026-02-17.pdf.

Do I need a permit for a fence in Farragut or Maryville?

In Farragut, the official FAQ states that fences up to a maximum of 7 feet in height on a residential lot do not require a building permit, with placement, right-of-way, easement, and stormwater limits; pool fences are typically part of a swimming pool permit (https://www.townoffarragut.org/faq.aspx?qid=73). In Maryville, the city's fence handout states that single-family and two-family properties outside historic districts may construct a fence without a permit or review if they follow the handout's height, front-yard, and safety rules; historic districts need Historic Zoning Commission approval first (https://www.maryvillegov.com/uploads/8/2/6/7/8267180/fence_regulations_info.pdf).

Does Alcoa or Oak Ridge require a fence permit?

Yes, according to the official texts reviewed for this page. In Alcoa, construction, installation, or placement of any fence, regardless of material, requires a building permit and proof of property lines, and no fence shall exceed 8 feet (Alcoa Zoning Ordinance § 14-2.2105(2), https://www.cityofalcoa-tn.gov/DocumentCenter/View/248/221-General-Provisions-PDF). In Oak Ridge, no structure provided for in that fence section shall be erected without a Zoning Compliance Permit, with height limits of 4 feet in the front setback and 6 feet in the side and rear setbacks (§ 3.07(e) and § 3.08(c), https://www.oakridgetn.gov/DocumentCenter/View/3551/Zoning-Ordinance-PDF-).

Do I need a fence around a pool in Knoxville or Knox County?

Pool-barrier rules are separate from ordinary yard-fence rules and should be confirmed with the local office. The City of Knoxville's official guidelines state that the city enforces Section 305 of the 2018 International Swimming Pool and Spa Code, including a barrier at least 48 inches high (https://www.knoxvilletn.gov/DocumentCenter/View/1731/Residential-Swimming-Pool-Barrier-Guidelines-PDF). Knox County's Swimming Pool Responsibility Form also requires a barrier at least 48 inches high and self-closing, self-latching gates (https://www.knoxcounty.org/codes/pdfs/SwimmingPoolResponsibilityForm.pdf). Some details differ between those documents — use the one that applies to the address.

Do I need to call 811 before building a fence in Tennessee?

Yes. Call 811 (Tennessee One Call) before digging so utility-owned lines can be marked. Tennessee Code Annotated § 65-31-106 addresses notice to the one-call service before excavation (https://law.justia.com/codes/tennessee/title-65/chapter-31/section-65-31-106/). Maryville's official fence handout also states that Tennessee law requires this call before digging (https://www.maryvillegov.com/uploads/8/2/6/7/8267180/fence_regulations_info.pdf).

Do HOA rules replace a city or county fence permit?

No. A homeowners association's covenants, if a lot is in one, are private rules. They do not replace city or county zoning, permit, easement, or pool-barrier requirements, and they can be stricter than those public rules. If the property has an HOA or other recorded covenant, obtain any required written approval before work starts, and still confirm the public rules with the local codes office.

Ready to plan the fence?

When the jurisdiction, height, easements, and any pool-barrier or HOA rules are clear, we can walk the lot, plan the run, and give you an on-site estimate.

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Reminder: Rules change. Confirm the current requirements with the local codes office for the address before construction begins.

Planning guide: Who owns a fence on the property line in Tennessee?