Unincorporated Lampasas County, Texas has no general building permit for a home; the county's own land-development regulation covers subdivision platting and septic systems, not building permits1. Texas law explains the gap: only a county with a population over 250,000, or one adjacent to such a county, can require building permits, and Lampasas County's population of about 23,262 falls well short23. Lampasas County itself has no zoning ordinance -- the City of Lampasas, the town inside the county, has its own separate zoning and building codes that apply only within city limits, not to the rest of the county45.
At a glance
- Building permit
- Not required for unincorporated construction; population is far below the threshold Texas law sets for county permit authority12
- County zoning
- None outside the City of Lampasas, which has its own separate zoning645
- Septic permit
- Required through the county's TCEQ-approved OSSF program78
- RV / tiny home / manufactured home living
- Unrestricted by county zoning outside city limits4
- Subdivision minimum lot width
- 60 feet, measured 25 feet from the front property line9
- Building setback from road right-of-way (in subdivisions)
- 50 feet on major highways/roads, 25 feet on other public roads10
- Owner-builder exemption
- Unconfirmed -- the county's own pages do not state one either way11
Who to call
Planning & zoning
Lampasas County Judge's Office
Subdivision plat applications, OSSF (septic) program coordination, and general county administration for unincorporated Lampasas County
501 E 4th St, Suite 103, Lampasas, TX 76550
Contact details are copied from each office’s official page and were checked against it on September 24, 2026.
Do you need a building permit in Lampasas County, Texas?
Unincorporated Lampasas County has no general building-permit program: the county's own land-development regulation covers subdivision platting and septic systems, not building permits1. Texas law explains why: only a county with a population over 250,000, or one adjacent to such a county, may require building permits or adopt residential building standards, and Lampasas County's population is about 23,262, far below that threshold23. The county's own pages do not separately confirm or deny a building-permit requirement in so many words, so if your project is unusual, confirm directly with the County Judge's office before you assume nothing applies12. Do not confuse this with the City of Lampasas: the town has adopted the 2021 International Building Code and related codes, but only for land, buildings and structures inside its own city limits, not for the rest of the county13.
Who handles subdivision, septic and permit questions in Lampasas County?
Lampasas County's OSSF (septic) program and subdivision-plat review both run through the County Judge's office, which is also the office the Texas Commission on Environmental Quality corresponds with on the county's OSSF program128. Reach the office at 512-556-8271, 501 E 4th St, Suite 103, Lampasas, TX 7655012. Lampasas County has no separate building, zoning, engineering or environmental-health department -- the County Judge's office is the county's central land-development contact12.
Does Lampasas County have zoning?
Lampasas County itself has no zoning ordinance in its unincorporated area6. Texas law gives zoning authority only to municipalities, not counties, outside a short list of specific, narrowly defined places elsewhere in the state, and Lampasas County is not one of them, so the county has no legal power to zone4. Because the county has no zoning authority, it sets no minimum dwelling size, lot-coverage or building-height rule for unincorporated land outside a platted subdivision, and accessory dwelling units, RVs and manufactured homes are unrestricted by county zoning4. The City of Lampasas is a different story: it is an incorporated municipality with its own zoning ordinance that applies only to land, buildings and structures inside city limits, so a search for 'Lampasas zoning' can easily return the city's rules when you actually need the unincorporated county's answer5.
How do septic permits and subdivisions work in Lampasas County?
Lampasas County operates under a TCEQ-approved OSSF order that applies to all on-site sewage disposal systems in the county's jurisdiction, except any area already regulated under a separate order, ordinance or resolution814. Before an OSSF can be used, the installer must notify the permitting authority at least five working days before it is ready for inspection, and the system cannot be used until it passes that inspection15. Only about 10.1% of Lampasas County's soils are free of severe limitations for a conventional septic drain field, so plan on a site evaluation and likely an alternative or aerobic system16. Subdividing a tract still requires plat review by the County Engineer and approval by the Commissioners Court: the county has 10 business days to flag missing items, a 30-day review period once the application is complete, and an additional 15-day review if you have to resubmit17. Lots in a regulated subdivision must be at least 60 feet wide, measured 25 feet from the front property line9.
Can you live in an RV, tiny home or manufactured home on your land in Lampasas County?
Yes, outside city limits -- Lampasas County has no zoning authority, so RV occupancy, tiny-home occupancy and manufactured-home occupancy on private land are unrestricted by county zoning4. That is a real answer from Texas law, not just an absence of a county rule: state law gives Lampasas County no power to regulate these uses through zoning4. A septic system for any of these still needs an OSSF permit through the county's TCEQ-approved program8. If you are inside a subdivision instead of on open land, that subdivision's own setback and lot-width rules still apply even though the county has no zoning109.
Building on land in Lampasas County: the steps, in order
- Confirm whether you are inside city limits, a city ETJ, or fully outside -- the City of Lampasas has its own zoning and building codes that do not apply once you are outside city limits and ETJ54.
- No county building or electrical permit is required for the home itself outside city limits, since Texas law limits county permit authority to counties over 250,000 people or adjacent to one, well above Lampasas County's population23.
- If you are dividing the tract or creating a subdivision, submit a plat application to the County Engineer through the County Judge's office; expect a 30-day review once the application is complete1217.
- Apply for an OSSF (septic) permit under the county's OSSF order before installing a system, and give at least five working days' notice before the construction inspection815.
- If a lot in your subdivision touches or is adjacent to the floodplain, expect Lampasas County to require a floodplain development permit before construction18.
- If you are inside a regulated subdivision, follow its 60-foot minimum lot width and 25-to-50-foot road setbacks even though the county has no zoning outside subdivisions910.
What to check before you buy land in Lampasas County
Lampasas County averages 32 inches of rain a year and has spent roughly 30% of years in severe drought, so confirm your water source before closing1920. Only about 10.1% of the county's soils are free of severe limitations for a conventional septic drain field, even though 91.6% of the county's land sits at 15% slope or less, so gentle terrain here does not guarantee an easy septic site1621. About 28.8% of the county is wooded, useful context for clearing a building site and for wildfire exposure22. If you are near the Saratoga Underground Water Conservation District's aquifer, a well permit is required unless your well qualifies for a domestic, livestock or poultry exemption on a large enough tract23. The county's effective property tax rate is about 1.3%, with a median property tax bill of $2,993 a year2425. Lampasas County sits roughly 35 miles from the nearest metro area, with a population density of 32.6 people per square mile2627.
Watch-outs
- The City of Lampasas -- the town inside the county -- has its own zoning ordinance and adopted building codes, but neither applies to unincorporated Lampasas County land; search results for 'Lampasas zoning' or 'Lampasas building codes' often mean the city, not the county513.
- Whether an owner-builder exemption applies in unincorporated Lampasas County is unconfirmed -- the county's own materials do not state one either way11.
- A driveway onto a Texas state highway needs a TxDOT permit (Form 1058) and 24-hour advance notice before construction on the right of way begins, separate from any county subdivision driveway rule28.
Sources
- Lampasas County Subdivision Regulations (2021) (2026 county census)
- Local Government Code Chapter 233, County Regulation of Housing and Other Structures (Texas statewide rule), quoted and re-checked
- County population: Bolthole Index county data
- Texas law on county zoning and building authority
- Zoning Ordinance — City of Lampasas, Texas, quoted and re-checked
- Lampasas County Subdivision Regulations (2021) (2026 county census)
- TCEQ Order Approving Lampasas County OSSF Order (2026 county census)
- TCEQ Order Approving Lampasas County OSSF Order, quoted and re-checked
- Lampasas County Subdivision Regulations, quoted and re-checked
- Lampasas County Subdivision Regulations, quoted and re-checked
- (2026 county census)
- Lampasas County Judge's Office (co.lampasas.tx.us)
- Building & Planning — City of Lampasas, quoted and re-checked
- TCEQ Order Approving Lampasas County OSSF Order, quoted and re-checked
- Chapter 285 — On-Site Sewage Facilities, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Lampasas County Texas - Subdivision Regulations (as approved 09/27/2021), quoted and re-checked
- Lampasas County Texas - Subdivision Regulations (as approved 09/27/2021), quoted and re-checked
- Annual precipitation: Bolthole Index county data
- Share of years in severe drought: Bolthole Index county data
- Share of land at 15% slope or less: Bolthole Index county data
- Wooded share of land: Bolthole Index county data
- Rules of the Saratoga Underground Water Conservation District, quoted and re-checked
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Distance to the nearest metro area: Bolthole Index county data
- Population density: Bolthole Index county data
- Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked
Written September 24, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.