Height limits come from zoning
Zoning usually allows about 4 ft in front yards and 6 ft in back and side yards — Minneapolis: 4 ft in front, 6 ft at the side and back; Fairfax County, VA: 4 ft in front, 7 ft at the side and back. Check your town’s rules and your HOA’s. Many towns want the finished side facing the neighbor or the street.