Protected trees
Significant trees: 6 inches or more in diameter at 4.5 feet. Ashe juniper, huisache, mesquite, Arizona ash and hackberry count as significant only when at least one trunk is 10 inches or more. Small species (Texas persimmon, Texas redbud, Texas mountain laurel, condalia, possumhaw, hawthorn) are significant at 5 inches. Heritage trees: 24 inches or more (small species: at least one trunk 12 inches or more). These rules apply to development, clearing and construction; finished homes do not need a permit.