Building permits, zoning and land rules in Comal County, Texas

Unincorporated Comal County has no general residential building permit requirement¹. County approvals that may apply before construction include septic (OSSF), floodplain development, driveway/right-of-way (PIPROW), utility, Fire Marshal and Camp Bullis Dark Skies lighting permits¹. The county Fire Code covers commercial establishments, public buildings and multifamily dwellings with 4 or more units in unincorporated areas⁷. For cities reaching into Comal County, San Antonio, mainly in Bexar County, and Schertz, mainly in Guadalupe County, administer their own building permits inside city limits^8,9. Septic permitting remains with Comal County Environmental Health for Comal County properties⁴.

For an ordinary home in unincorporated Comal County, start with the offices responsible for the specific approvals your project needs¹. Comal County Environmental Health handles septic permits, and the Engineer's Office handles floodplain development permits; both list 830-608-2090 and 195 David Jonas Drive, New Braunfels, TX 78132^4,6,10,11. The Road Department handles county right-of-way driveway applications at the same phone and address^12,13. The Fire Marshal's Permit Division handles covered fire-code construction at 830-643-3748, 145 David Jonas Dr., New Braunfels, TX 78132^7,14. Covered projects need a permit before construction or substantial improvement, including qualifying work exceeding 50% of building value or a change in occupancy classification¹⁵. The permittee must arrange sufficient professional inspections and a signed, sealed final inspection request; the Fire Code Official conducts the final occupancy inspection before issuing a Certificate of Compliance¹⁵.

Unincorporated Comal County has no county zoning district, minimum dwelling size, lot-coverage or building-height rule; county zoning does not restrict accessory dwellings, RVs, tiny homes, manufactured homes or temporary camping². New Braunfels administers municipal zoning inside city limits, while its ETJ subdivision review operates through agreements with Comal and Guadalupe Counties¹⁶. Bulverde applies district-specific zoning inside its corporate limits³. Cities reaching into Comal County also set zoning: San Antonio and Fair Oaks Ranch, mainly in Bexar County, and Schertz, mainly in Guadalupe County^8,17,18. Comal County Environmental Health remains the septic permitting authority for county properties inside cities⁴. County subdivision rules still require platted individual-OSSF lots of at least 1.0 acre with approved public water or 5.01 acres without, and plats show a 25-foot road-frontage building setback⁵.

Comal County Environmental Health requires approved plans and a septic permit before building, altering, extending or operating an OSSF⁴. Obtain a site and soil evaluation and authorization to construct before installation; homeowners may sometimes design a conventional system with local assistance, but complex systems and specified sites require professional planning¹⁰. Installation requires 3 inspections with at least 24 hours' notice; a failed or unready system triggers a $150 reinspection fee, and a Permit of License to Operate is required before use¹⁰. Texas allows a permitting exemption for a single-family dwelling on at least 10 acres only when it is the tract's only dwelling, a qualified evaluator assesses the site, all system components are at least 100 feet from property lines, effluent stays on-site, standards are met, and no nuisance or groundwater pollution results; ask Environmental Health whether local requirements allow the exemption¹⁹. Only 2.2% of Comal County land is rated without severe limitations for conventional drain fields, making septic feasibility a priority before purchase²⁰.

County zoning does not restrict RV or tiny-home occupancy on unincorporated Comal County land². Off-grid wastewater still needs an approved OSSF plan and septic permit where public sewer is unavailable, subject to applicable exemptions^19,21. A home or manufactured home in the unincorporated county's 100-year floodplain needs a floodplain application and compliant plans, with the lowest floor at or above the floodplain elevation²². Owner-installers of industrialized housing for their own use may obtain a $75-per-building state installation permit instead of industrialized-builder registration; that option concerns regulated modular construction, not ordinary site-built homes²³. Inside New Braunfels, short-term rentals are prohibited in residential zoning districts and the floodway, and permitted rentals require registration and annual life-safety inspections²⁴.

1. Establish city-limit and ETJ status before choosing the approval route; municipal zoning and subdivision-review arrangements differ from unincorporated county rules^3,16.
2. Apply for relevant county approvals in person or through the county's online portal, completing and uploading the documents for each permit type¹.
3. Ask the Engineer's Office for a floodplain determination; the application requires a scaled drawing, recorded ownership proof and a $40 fee^6,11.
4. Arrange the septic evaluation and approved plans with Environmental Health, then obtain authorization to construct before installing the OSSF¹⁰.
5. Apply to the Road Department before county right-of-way work: PIPROW costs $25 and requires an on-site meeting and final inspection; concrete driveways also need a pre-pour inspection^12,13.
6. For a state-highway driveway, submit TxDOT Form 1058 to the local district office²⁵.
7. Obtain written Comal Trinity Groundwater Conservation District authorization before drilling or altering a well within the district²⁶.
8. For covered commercial, public or multifamily construction, secure the Fire Marshal's building permit and arrange required inspections before occupancy¹⁵.

For a divided tract in unincorporated Comal County, verify subdivision approval: the regulations effective June 11, 2026 generally require a plat when dividing land to lay out lots, a subdivision or specified shared-use areas⁵. Subdivision lots cannot be sold before final Commissioners Court approval and filing with the County Clerk; even plat-exempt subdivisions need 60 continuous feet of frontage on or to existing county roads⁵. Qualifying agricultural, ranch, wildlife-management or timber divisions may avoid platting only under stated conditions, including no specified shared-use areas; OSSF lot-size requirements remain, and platting applies if the qualifying use ends⁵. For an existing non-exempt Trinity well within the Comal Trinity Groundwater Conservation District, verify registration; existing-well registration has no fee²⁶. New-well authorization expires if drilling is not completed within 1 year²⁶. Comal County's effective property tax rate is about 1.2%, with a median annual bill around $4,827²⁰.