Williamson County has no ordinance regulating holiday lights, inflatables, or yard displays on residential property, and Tennessee has no state law on them. A homeowner decorates without a county permit; a subdivision's HOA covenants are the only real limit.
There is no Williamson County rule on Christmas lights, seasonal inflatables, or other holiday displays on private residential property, and Tennessee has no statute on them either. A homeowner in the unincorporated county, around Nolensville, Thompson's Station, or College Grove, may decorate freely, provided a display does not block a sidewalk, driveway, or the sight lines at an intersection, and electrical work uses outdoor-rated equipment. In a deed-restricted subdivision, the homeowners' association's covenants set any limits on how long lights stay up, brightness, and whether large inflatables are allowed. Cities such as Franklin and Brentwood may apply their own nuisance and sign rules.
Outside an HOA the county does not cite holiday displays, so there is no penalty unless a display blocks a right-of-way or creates a hazard. Within a subdivision, out-of-season or oversized displays draw the covenant fines the association sets.
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