Texas

Buying Land in Blanco County, Texas

Blanco County, seat Johnson City, sits in the Texas Hill Country with a real short-term-rental, wedding-venue, and wine-country economy. Its groundwater district requires every well to register and charges a real fee for a new non-exempt permit, the county issues its own septic permits with a notable transfer-time requirement, and -- a genuinely surprising legal fact -- the county has no statutory power to regulate short-term rentals in its own unincorporated area.

Every Well Must Register, and a New Non-Exempt Permit Costs $1,000

Case-by-case / verify locally

The Blanco-Pedernales Groundwater Conservation District requires all wells in the county to register under its rules and Water Code Chapter 36. Wells producing no more than 25,000 gallons per day in aggregate are exempt from needing an Operating Permit, but the application fee for a new Operating Permit on a non-exempt well runs $1,000. District rules also set concrete spacing requirements: new wells must sit at least 50 feet from property lines and septic tanks, and at least 100 feet from septic disposal fields and existing wells. Confirm exempt/non-exempt status and current fees directly with the district (830-868-9196) before drilling or relying on an existing well's registration.

Blanco County Issues Its Own Septic Permits -- With a Transfer-Time Catch

Generally favorable

Blanco County is a TCEQ authorized agent for OSSF permitting, handled through the county's own OSSF program. One detail worth knowing before buying a property with an existing maintained (aerobic) system: the county's OSSF rules require a signed maintenance contract to be submitted to the Blanco County OSSF Inspector within 30 days of the property being transferred. If you're buying land with an aerobic septic system already installed, budget for lining up a maintenance contract immediately at closing rather than treating it as optional paperwork.

The County Has No Legal Authority to Regulate Short-Term Rentals

Generally favorable

Texas Local Government Code Section 240.102 only authorizes a county to regulate short-term rental units in its unincorporated area if that county has a population of 585,000 or more and is adjacent to a county with a population of 4,000,000 or more. Blanco County, with roughly 13,000-13,600 residents per 2024-2025 Census Bureau estimates, does not come close to either threshold, so the Blanco County Commissioners Court has no statutory power to license, cap, or otherwise regulate short-term/vacation rentals on unincorporated county land -- a genuinely favorable, checkable fact for anyone buying rural Blanco County land with a cabin-rental or guesthouse strategy in mind. See the dedicated short-term-rentals page below for what this does and doesn't mean in practice.

The County's Own Subdivision Rules Are Under Active Revision

Could not confirm

Blanco County regulates platting in the unincorporated county under Local Government Code Chapter 232, Subchapters A and E, and its Development Rules and Regulations have been actively redrafted, with a clean draft dated January 2024 following earlier 2023 drafts. That recency is a double-edged fact: the rules are current, but a specific requirement could shift again as the county continues to formalize them. Confirm the currently adopted version directly with the county before relying on an older copy for a subdivision or plat.

Groundwater: mandatory registration and a real fee for new non-exempt wells

Groundwater across Blanco County is managed by the Blanco-Pedernales Groundwater Conservation District, which requires every well in the county -- exempt or not -- to be registered under its rules and Water Code Chapter 36. A well producing no more than 25,000 gallons per day in aggregate is exempt from needing an Operating Permit, but the application fee for a new Operating Permit on a non-exempt well is a real $1,000, and district rules impose concrete spacing requirements: 50 feet from property lines and septic tanks, and 100 feet from septic disposal fields and existing wells. For a buyer evaluating a specific tract, that means checking not just whether a well can be drilled, but where it can physically sit relative to the property line, any septic system, and any neighboring well -- confirm current rules and fees directly with the district before finalizing a site plan.

Septic: a county-run program with a transfer-time requirement worth knowing

Blanco County holds TCEQ authorized-agent status and runs its own OSSF program rather than routing through a TCEQ regional office, with its own OSSF Inspector handling permits and inspections. One specific rule stands out for a buyer: when a property with a maintained (aerobic) OSSF system changes hands, a signed maintenance contract must be submitted to the Blanco County OSSF Inspector within 30 days of the transfer. That's a real compliance deadline that starts running at closing, not a suggestion -- if you're buying Blanco County land with an existing aerobic system, line up a maintenance provider and get the contract filed before that 30-day window closes.

Short-term rentals: a legal gap that favors the buyer

Blanco County has a genuine and growing short-term-rental, wedding-venue, and wine-country tourism economy, concentrated around the Hill Country scenery and LBJ-country history near Johnson City and the town of Blanco. A specific, checkable state statute matters directly here: Local Government Code Section 240.102 grants a county the authority to regulate short-term rental units in its unincorporated area only if the county's population is 585,000 or more and it's adjacent to a county with a population of 4,000,000 or more -- thresholds aimed at populous counties near a major metro core. Blanco County, with a population of roughly 13,000-13,600 per current Census Bureau estimates, is nowhere close to either number, meaning its Commissioners Court simply has no statutory authority to adopt a county-level short-term-rental licensing or registration scheme for unincorporated land, unlike the City of Blanco, which has adopted its own STR ordinance (Ordinance 2022-O-005) that applies only within city limits. See the dedicated short-term-rentals page for what this legal gap means in practice for a rural cabin-rental or guesthouse purchase.

Subdivision platting: county rules under recent, active revision

As in most rural Texas counties, Blanco County has no general zoning ordinance, but the Commissioners Court does regulate subdivision and platting in the unincorporated county under Local Government Code Chapter 232, Subchapters A and E -- any division of a tract outside city limits into two or more parts generally requires a plat submitted for Commissioners' Court approval. The county's own Development Rules and Regulations document has been through multiple recent drafts, with a clean version dated January 2024 following drafts from late 2023, suggesting an actively maintained but still-evolving framework. Confirm the currently adopted rules directly with the county before subdividing or relying on the plat status of an already-divided tract.

What we could and couldn't confirm

The Blanco-Pedernales Groundwater Conservation District's registration requirement, exempt-well threshold, $1,000 non-exempt Operating Permit fee, and specific well-spacing distances are drawn from the district's own rules and forms pages. Blanco County's OSSF authorized-agent status and its 30-day post-transfer maintenance-contract requirement are drawn from the county's own posted OSSF application checklist. The Local Government Code Section 240.102 population thresholds (585,000 county population, adjacent to a 4,000,000-population county) are drawn from the statute's own bill text, cross-checked against Blanco County's own population -- CORRECTED 2026-09: previously stated as 'roughly 10,000-12,000,' a stale figure; current Census Bureau estimates put the county at roughly 13,358 (2024) to 13,600-13,628 (2025) -- to confirm it does not qualify, which it still does not by a wide margin. The county's Development Rules and Regulations redraft dates are drawn from the county's own posted PDF documents.

Verify directly with: the Blanco-Pedernales Groundwater Conservation District for well registration and permitting, the Blanco County OSSF Inspector for septic permitting and transfer requirements, and the Blanco County Commissioners Court's office for the current, adopted subdivision/development rules

Who to Call Before Buying Land in Blanco County

Blanco County has no zoning department because unincorporated Blanco County is not zoned. For land inside the City of Blanco or Johnson City limits, contact that city's own planning/permitting office instead of the county -- this includes the City of Blanco's own short-term-rental ordinance, which applies only inside city limits, not countywide.

Wells / Private Water

Blanco-Pedernales Groundwater Conservation District

Well registration, exempt/non-exempt status, Operating Permit applications and fees, and well-spacing rules.

Phone: (830) 868-9196Email: office@blancogroundwatertx.govOfficial website →

Septic / Onsite Wastewater

Blanco County OSSF Program

On-site sewage facility (septic) permits, inspections, and maintenance-contract transfer requirements -- Blanco County is a TCEQ authorized agent.

Official website →

Subdivision & Land Development

Blanco County Commissioners Court / Development Rules Administration

Subdivision platting review and the current, adopted version of the county's Development Rules and Regulations for unincorporated land.

Official website →

Assessor / Property Tax

Blanco County Appraisal District

Assessed value, property tax, and agricultural (ag/wildlife) valuation questions for a specific parcel.

Phone: (830) 868-4013Official website →

Recorder / Clerk / Land Records

Blanco County Clerk

Recorded deed, easement, and plat history for a specific parcel.

Phone: (830) 868-7357Official website →

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Topics Specific to Blanco County

Short-Term Rentals in Blanco County: A Legal Gap in County Regulation →

Sources

About -- Blanco-Pedernales Groundwater Conservation District — Blanco-Pedernales Groundwater Conservation District (accessed 2026-09)
Exempt & Non-Exempt Wells -- Blanco-Pedernales Groundwater Conservation District — Blanco-Pedernales Groundwater Conservation District (accessed 2026-09)
Rules -- Blanco-Pedernales Groundwater Conservation District — Blanco-Pedernales Groundwater Conservation District (accessed 2026-09)
OSSF Application Checklist (updated 10-1-25) — Blanco County, Texas Government (accessed 2026-09)
Blanco County, Texas Development Rules and Regulations (clean draft, Jan. 2024) — Blanco County, Texas Government (accessed 2026-09)
Texas Local Government Code Section 240.102 — Texas Legislature Online (accessed 2026-09)
Blanco County Appraisal District — Blanco County Appraisal District (accessed 2026-09)
Blanco County Clerk Official Public Records — TexasFile (directory of Blanco County Clerk records) (accessed 2026-09)

Last reviewed 2026-09