Fence heights are generally controlled by local ordinance but may also be a subject covered in neighborhood covenants. Commonly, they restrict fence heights to six feet in back yards, and three to four feet in front yards.
Natural fences are more burdensome. Bushes or trees used as natural borders or fences (or deemed to constitute same) become overgrown and tend to encroach on neighbors’ properties. In addition to the encroachment (which may constitute a trespass), overgrown natural fences also tend to obstruct views, thereby possibly violating another covenant.