Boerne, the Kendall County seat, regulates ADUs through its own zoning ordinance, not San Antonio's. We have not summarized Boerne's ADU standards here because we could not confirm the current text from the city as of October 2026. We review the ordinance for your zoning district during the lot check and confirm with city staff.
What makes Boerne lots different?
- Rock. Shallow limestone can mean rock excavation for footings and utility trenches.
- Slope. Hillside lots need grading and drainage plans and sometimes stepped foundations.
- Trees. Mature oaks are part of what buyers value, and root zones limit where a slab can go.
- Septic and wells. Properties outside city service areas may rely on on-site systems, which affects whether another dwelling can be added.
Do Boerne subdivisions restrict ADUs?
Many do. Deed restrictions in Hill Country subdivisions often govern building materials, minimum sizes and the number of dwellings per lot. Those are recorded with the Kendall County Clerk. See deed restrictions and HOAs.
Is it worth building one here?
That depends on your goal and the lot. For family use, a small cottage can fit well. For rental income, confirm both city rules and covenants first, then compare with regional rent data.