A Tree Removal Permit is needed to remove a protected, significant, specimen or heritage tree. Exempt: trees under 10" at an existing owner-occupied single-family or duplex home, Table 6.1-1 species under 12", and dead/diseased trees or imminent hazards. Oaks cannot be removed or trimmed Feb 1 to Jul 1 without a City Manager waiver.
How to apply: Apply for a Tree Removal / Tree Trimming Permit through MyGovernmentOnline; the Building Official acts within 10 business days.
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: be6240.zoninghub.com/highlights/Requirements.aspx · be6240.zoninghub.com/highlights/procedures/procedure.aspx?id · beecavetexas.gov/common/pages/DisplayFile.aspx?itemId=192949 · beecavetexas.gov/residents/home_safety/tree_pruning_ordinanc