8 county-level rules, plus city-specific rules for 1 city in Williamson County, Tennessee.
Verified from official government sources
Unincorporated Williamson County sets no fixed grass-height limit. Under Tenn. Code Ann. §5-1-115 the county can abate overgrowth only when it endangers health or safety, and owner-occupied homes are exempt. HOAs and cities like Franklin drive lawn standards.
Tenn. Code Ann. § 5-1-115(b)
the growth of trees, vines, grass, underbrush or the accumulation of debris, trash, litter, garbage, or any combination of the preceding elements
Williamson County does not require a permit to trim or remove trees on your own residential lot. You may cut a neighbor's overhanging branches back to the property line. Tree-canopy rules apply only to development, not homeowners.
In unincorporated Williamson County, removing trees from your own residential lot needs no permit. The county's tree-canopy rules apply only to subdivisions and land-disturbing development, which must inventory and retain a share of existing canopy.
Williamson County Zoning Ordinance § 13.07(C)(1) (Woodland and Tree Protection Standards)
For the purposes of this Section, "existing tree canopy" shall mean a contiguous area of 10,000 square feet or greater which consists of the crowns of healthy self-supporting trees with a diameter at breast height (DBH) of three inches or greater.
Williamson County abates overgrown, weedy, or debris-filled lots in unincorporated areas under Tenn. Code Ann. §5-1-115, but only when conditions threaten health or safety. Owner-occupied residences are exempt; enforcement targets vacant and nuisance parcels.
Tenn. Code Ann. § 5-1-115(c)
If the person fails or refuses to remedy the condition within ten (10) days after receiving the notice, the appropriate department or person shall immediately cause the condition to be remedied or removed at a cost in conformity with reasonable standards and the cost thereof assessed against the owner of the property
Tennessee has no statewide watering mandate, and water-abundant Williamson County sits in the Harpeth River basin. Any lawn-watering limits come from your local utility district, such as Milcrofton, Mallory Valley, or a city system, during drought.
Rainwater harvesting is legal in Williamson County. Tennessee places no restriction on residential collection, so rain barrels and cisterns for garden and lawn use are fine. Only large systems or potable use trigger permits or treatment.
Williamson County welcomes native and drought-tolerant landscaping, and its development standards favor native and adapted species. But Tennessee has no law stopping HOAs from requiring turf lawns, so private covenants may still limit your plant choices.
Artificial turf is allowed in Williamson County and residential installations rarely need a permit. Tennessee has no law barring HOAs from restricting synthetic turf, so your covenants, not the county, are the main constraint.
1 cities in Williamson County have their own landscaping rules rules. Each link goes to that city's dedicated page with code citations.
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Williamson County Ordinance Hub →