At an existing single-family home, a permit is needed only for heritage trees: 24"+ in diameter and not an unprotected species. On other property, protected trees (12"+ hardwoods) and heritage trees need a permit. Dead or diseased trees are exempt (subject to code official approval).
How to apply: Submit a tree removal permit request to City of Lakeway Building & Development Services before removal.
Texas law: cities cannot charge a tree mitigation fee for a tree under 10" at an existing one- or two-family home you live in (Local Gov't Code §212.905, HB 7, 2017). Since 2023, landowners can petition to leave a city's ETJ (SB 2038), so ETJ lines change; we read the live City of Austin jurisdiction map.
Official sources: ecode360.com/39616268 · lakeway-tx.civicweb.net/document/97397/