McKinney, TX Fence Regulations: Height Limits (2026)

McKinney's Engineering Design Manual and UDC Sight Visibility Triangle provisions require corner lots to keep an unobstructed triangular area at the intersection of two streets, or at a street and a driveway/alley. The triangle is measured 25 feet along each curb line from the point of intersection, producing a 25-by-25-foot sight area. Within that triangle, nothing between 3 feet and 8 feet in height is permitted: no solid fences, no masonry walls, no hedges, no landscape mounding, no mailbox enclosures, and no parked vehicles. Tree canopies must be limbed up to 8 feet so drivers can see through the trunk zone.

The rule applies to all McKinney intersections, including low-traffic residential corners in neighborhoods like Eldorado Heights and high-volume arterials at Custer/Virginia Parkway. Driveways entering arterial streets (SH-121 frontage, US-75 access roads) may require a larger triangle per TxDOT standards. Violations are treated as strict-liability site-distance hazards; Code Compliance can demand immediate trimming or removal, and the city may enter the right-of-way to cut vegetation at the owner's expense if a notice is ignored. This rule is enforced jointly by Engineering, Code Compliance, and Police traffic units after collisions.