Burnet County anchors the northern Hill Country — Marble Falls, Burnet, the Highland Lakes chain (Buchanan, Inks, LBJ). Granite country instead of pure limestone, lake frontage instead of river valleys, and a light county permit regime with one big asterisk: water.
Permits you’ll need (unincorporated Burnet County)
| Requirement | Details |
|---|---|
| General building permit | No general residential building permit in unincorporated areas — typical for rural Texas counties. |
| Septic (OSSF) | Mandatory, permitted through Burnet County Environmental Services under the county’s OSSF order. Lake-area lots get extra scrutiny. |
| Floodplain | Floodplain development application required for FEMA-zone parcels — significant around the lakes and creeks. |
| Subdivision regs | Platted subdivisions carry county subdivision regulations plus likely deed restrictions/POA rules. |
| LCRA | Lakefront work — docks, retaining walls, anything near the waterline — involves LCRA approvals, separate from the county. |
Verify current requirements with Burnet County Development/Environmental Services before you commit — rural counties update OSSF and floodplain rules more often than they update their websites.
ETJ warning: Marble Falls, Burnet and Granite Shoals ETJs extend past city limits; confirm your parcel’s status.
Barndos around the Highland Lakes
The lakes are the draw and the complication. Lakefront and lake-view lots are often in POA-governed subdivisions whose deed restrictions may limit metal buildings, minimum square footage, or roof pitch — deed restrictions kill more Hill Country barndo plans than county rules ever do. Read them before you buy: permits and zoning guide.
Terrain and site costs
Burnet is granite and gneiss country (think Enchanted Rock’s geology) mixed with limestone in the south and east. Excavation is still rock excavation. Aerobic septic is standard ($12K–$20K); wells hit granite aquifers with variable yields — get a well log from neighbors or a local driller before pricing the build. Co-op water covers more area than people expect: check first. Related: choosing the right land.
What it costs in 2026
Outside the Austin metro pull, Burnet prices near standard Hill Country ranges — turnkey commonly $120–$160/sq ft, with lake-area customs pushing well past $200/sq ft. Full breakdown: how much does a barndominium cost?
FAQ
Do I need a building permit for a barndominium in unincorporated Burnet County?
No general building permit — but septic (through Environmental Services), floodplain compliance where applicable, and any subdivision/POA rules absolutely apply.
Can I put a barndominium on a lake lot?
County-wise, usually yes; the real gatekeepers are the subdivision’s deed restrictions and, for anything touching the shoreline, LCRA. Verify both before closing.
Is Burnet cheaper than Hays or Comal for the same build?
Typically yes — no metro permit premium, no Edwards Aquifer reviews, no county inspection regime. Savings show up in both fees and timeline.
Building in Burnet County? Get matched with a builder who knows granite country →
Towns in Burnet County
Town-level guides with local permitting, site conditions and cost tables: