Allen, TX Fence Regulations: Height Limits (2026)
Key Facts
- Triangle
- 25 feet each leg
- Max Height
- 30 inches
- Applies To
- Fences, hedges, signs
- Driveways
- 10 ft approach triangle
- Enforcement
- Code Compliance
Summary
Allen enforces a 25-foot sight visibility triangle at all corner lots and a smaller triangle at driveway approaches. Fences, hedges, and landscaping within the triangle cannot exceed 30 inches in height.
Sec. 143.028. FENCES. (a) A person is not required to fence against animals that are not permitted to run at large. Except as otherwise provided by this section, a fence is sufficient for purposes of this chapter if it is sufficient to keep out ordinary livestock permitted to run at large.(b) In order to be sufficient, a fence must be at least four feet high and comply with the following requirements:(1) a barbed wire fence must consist of three wires on posts no more than 30 feet apart, with one or more stays between every two posts;(2) a picket fence must consist of pickets that are not more than six inches apart;(3) a board fence must consist of three boards not less than five inc
Full Breakdown
The Allen Land Development Code (ALDC) sight-visibility triangle requirement protects intersection sightlines for drivers and pedestrians. At corner lots, nothing between 30 inches and 8 feet in height may be placed within a 25-foot-by-25-foot triangle measured from the intersection of the two street right-of-way lines. At driveway approaches, a smaller 10-foot triangle applies to keep backing vehicles visible. Common violations involve mature hedges, decorative stone walls, monument signs, and trailers parked in the triangle. Code Compliance enforces this strictly because it is a safety-of-life issue. Texas Transportation Code Sec. 545.301 and Allen traffic ordinances treat sightline obstruction as contributing to liability in intersection collisions. Trees with canopies trimmed to 8 feet clear are allowed; low branches that hang into the triangle must be pruned.
Violations & Fines
Notice to abate within 7-10 days; failure to comply, up to $500 per day under Allen Code Sec. 1-7. City may trim at owner expense as last resort.
Frequently Asked Questions
What is a sight visibility triangle in Allen?
Can I have a tree in my corner-lot front yard?
Does the 30-inch rule apply to my driveway too?
Sources & Official References
Other rules in Allen
How Allen compares: Cities That Allow the Tallest Residential Fences·Texas rules heatmap·Compare Allen to another location·View the Texas fence regulations overview
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Height Limits in Nearby Cities
How other cities in Collin County handle height limits.