Clarksville Fence Guide: Permits, 811 & Sinkholes (2026)

Updated October 24, 2026. This guide is general information, not legal or engineering advice. Rules change, so confirm with the agency listed before you start work.

Quick reference

Topic	What to know	Source
Population	Clarksville 166,722; Montgomery County 220,069 (2020 census)	Wikipedia (U.S. Census)
Rain and snow	About 53.5 in. of precipitation and 7.2 in. of snow a year	Wikipedia (NOAA normals)
Fence permit, county	No building permit required for a fence in the county; no encroaching on neighbors, easements or right of way	Montgomery County Building and Codes
Pool barrier	Owner pulls a barrier permit before a pool permit is issued	Montgomery County Building and Codes
Zoning questions	Clarksville-Montgomery County Regional Planning Commission	Montgomery County FAQ; CMCRPC
Digging	Tennessee 811: free, at least 3 working days' notice; tickets valid 15 calendar days	Tennessee 811
Contractor license	State license required for jobs of $25,000 or more, materials and labor included	TN Board for Licensing Contractors
Sinkholes	Common in the county; 60-ft undisturbed buffer around throats under county stormwater rules	Montgomery County Stormwater

How do Clarksville's weather and ground affect a fence?

Clarksville gets about 53.5 inches of precipitation a year and only about 7.2 inches of snow, so the main enemy of a fence here is water, not snow load. Posts that sit in damp soil rot at the ground line, and saturated soil lets posts lean under wind. Winters are usually mild, with an average January low near 28 degrees, but the record low is 20 below zero, and freeze-thaw cycles can still loosen shallow posts. Storms are the other factor: an F3 tornado devastated downtown in 1999, and an EF3 tornado struck north Clarksville in December 2023. Ask any contractor how deep they set posts, how they shape the footing to shed water, and how they size posts and gates for wind.

Do I need a permit for a fence?

Outside Clarksville city limits, Montgomery County Building and Codes says a building permit isn't required to build a fence and there are no fence setbacks. The fence still must not encroach on a neighbor's property, a drainage or utility easement, or the public right of way. Inside city limits, the county directs people to the City of Clarksville's Building and Codes office, and zoning questions go to the Clarksville-Montgomery County Regional Planning Commission. Clarksville is the county's only incorporated city, so those are the two sets of rules to know. If you live in Oak Grove, Kentucky, check with that city instead.

What about a fence around a pool?

Montgomery County requires a pool permit for all in-ground and above-ground pools, and a barrier permit must be pulled by the property owner before the pool permit is issued. Pool barriers have specific height, opening and gate requirements, so tell your contractor the fence is a pool barrier at the start, and ask the permit office what inspection is needed.

Who has to call 811?

Anyone who digs. Tennessee 811 is free and asks for at least three working days' notice before you start. It notifies utility owners, who send locators to mark their lines; Tennessee 811 doesn't mark lines itself. Tickets are valid for 15 calendar days after the requested start date, so a project that slips may need a new ticket. Private lines, such as a feed to a shop or a water line to a barn, aren't marked by the utilities, and 811 can't send a private locator for you; hire one if you have lines like that.

Does a fence contractor need a license in Tennessee?

The Tennessee Board for Licensing Contractors requires a contractor license before bidding or contracting on a project of $25,000 or more, counting materials and labor, and contractors must bid and contract in the exact name on the license. Tennessee also has a separate home improvement license for jobs between $3,000 and $25,000, but it applies only in counties that adopted it, and Montgomery County isn't on the state's list. For smaller jobs, ask for proof of general liability insurance and, if the contractor has employees, workers' compensation coverage.

What should I know about sinkholes?

Montgomery County sits in a well-developed karst region, and the county's stormwater department says sinkholes are a common feature here. They form as water dissolves limestone and can grow or reopen after being filled. The county recommends consulting a civil engineer or geotechnical professional before altering a sinkhole, fencing livestock away from them, and keeping chemicals and dumping out of them. Its stormwater rules call for a 60-foot undisturbed buffer around sinkhole throats, cave entrances and Class V injection wells. Plan fence lines around them rather than through them.

What about HOA covenants?

Many subdivisions around Clarksville have recorded covenants that set fence height, material, style and color, and some require written approval before you build. Covenants can be stricter than zoning. Get the current rules and approval form before collecting quotes, so every contractor bids on the same fence.

Questions to ask a fence contractor

Do you carry liability insurance and workers' comp? If the job is $25,000 or more, what's your Tennessee license number?
How deep will you set posts, in what, and how will the footing shed water?
Who files the 811 request, and who checks zoning, HOA rules and any pool barrier permit?
How will you handle rock, slopes and any sinkholes on the line?
What does your warranty cover, and for how long?

Common questions

Do I need a permit to build a fence in Montgomery County, TN?

Outside Clarksville city limits, the county says no building permit is required for a fence. Pool barriers need a permit. Inside the city, check with Clarksville's Building and Codes office.

How much notice does Tennessee 811 need?

At least three working days before digging. The service is free, and tickets are valid for 15 calendar days after the requested start date.

Does a fence contractor need a Tennessee license?

A state contractor license is required for projects of $25,000 or more, including materials and labor. Montgomery County isn't one of the counties that adopted the home improvement license.

Clarksville fence guide (2026)