County Building Permits
Colorado County, TX - 2026 Building Permit Guide
How to apply for a building permit in unincorporated Colorado County, Texas. Permit authority, application steps, fees, and inspection requirements.
Texas Updated March 2026
Permit Authority
Unincorporated Colorado County only. County controls are narrower and centered on development permits, floodplain review, OSSF permits, subdivision review, and county road or drainage regulation rather than general building permits for all construction.
- Department
- Colorado County Floodplain Management / 9-1-1 Rural Addressing and Colorado County On-Site Sewage Facility (OSSF)
- Address
- 305 Radio Lane, Suite 110, Columbus, TX 78934 (Floodplain/Addressing); 305 Radio Lane, Room 105, Columbus, TX 78934 (OSSF)
- Phone
- 979-732-6380 (development/floodplain/addressing); 979-732-2435 (OSSF)
Application Process
- Determine which county approval actually applies. County controls support development/911 addressing permits, floodplain review, OSSF permits, subdivision review, and county road or drainage controls rather than general building permits.
- For a residential or commercial development permit, the property owner completes the county development permit application and provides proof of ownership such as the first page of the deed or a current property tax receipt.
- If floodplain conditions apply, provide any additional floodplain materials required by the county.
- Pay the county permit fee. Residential development permit: $30.00; commercial development permit: $350.00; 911 sign: $10.00; mailed sign: additional $10.00.
- After the county receives completed paperwork and payment, it begins processing the 911 address and/or development permit. The county will issue a confirmation letter for the 911 address and a green permit plaque or sign for development that must remain visible from the road during construction.
- If the project needs an OSSF permit, the landowner must complete the OSSF application, pay the OSSF fee ($250.00 residential; $350.00 commercial), obtain soil and site evaluation work from appropriately licensed professionals, submit design materials, and wait for county approval before construction begins.
- For OSSF work, the installer must request final inspection before covering the system. The county will issue a final permit to operate after successful inspection.
General Requirements
Development permits are required for construction in unincorporated Colorado County. OSSF permits are required for all septic installation or repairs. The county also regulates floodplain development and subdivision-related development. No countywide general building permit program for every residential or commercial structure was found.
Required Documents
- County development permit application (owner-completed)
- Proof of ownership (deed first page or current property tax receipt)
- Proposed construction details
- Location details
- Floodplain materials if applicable
- OSSF application and design materials if septic work required
- Site evaluation and soil assessment for OSSF
- Affidavit and maintenance contract for aerobic OSSF systems
- Permit validity
- Green permit valid for one year to start construction. OSSF permits valid for one year from issuance.
- Building code
- No countywide adopted building code and general building-permit enforcement program for all unincorporated construction was established. County regulates floodplain, development, subdivision, and OSSF instead.
- Owner-builder
- County forms require the property owner to fill out and sign the development permit and OSSF applications.
- Contractor requirements
- OSSF site evaluators, sanitarians, engineers, and installers must be appropriately licensed where their work is required.
Fees
- Minimum permit fee
- $30.00 (residential development) or $350.00 (commercial development)
- Plan check fee
- No separate plan-check fee identified. Commercial projects may require engineering review and drainage review costs paid directly to the engineering firm if such review is required.
- Permit fee formula
- Flat fees: Residential development permit $30.00; Commercial development permit $350.00; 911 sign $10.00; mailed sign additional $10.00; OSSF permitting $250.00 residential or $350.00 commercial.
Fees change. Verify current amounts at the official fee schedule.
Work That Does NOT Require a Permit
Contact the Colorado County Floodplain Management / 9-1-1 Rural Addressing and Colorado County On-Site Sewage Facility (OSSF) to confirm whether your project requires a permit before starting work.
Inspections
How to Schedule
- For OSSF: installer must notify county permit office and request final inspection. Contact: 979-732-2435 (phone)
- Scheduling deadline
- For OSSF work, final inspection must be completed before system is covered.
Typical inspection sequence: For OSSF: application, fee payment, soil and site evaluation, design approval, permit to construct, installation, final inspection before cover, then final permit to operate after successful inspection. For development and floodplain permits, no city-style staged building inspection program was described.
Additional Resources
- Building code: No countywide adopted building code and general building-permit enforcement program for all unincorporated construction was established. County regulates floodplain, development, subdivision, and OSSF instead.
- Zoning information: View zoning info
- Development Permit Application
- Residential 911 Address-Development Process
- Commercial Development Process
- Flood Damage Prevention Ordinance
- Subdivision Regulations
- OSSF Application
- OSSF Information Sheet
- License lookup guide: Texas Contractor License Requirements
- Contract template: Texas Homeowner-Contractor Agreement
- Texas hub: Texas Contractor License & Permit Hub
Information on this page was last verified: March 2026. Permit rules and fees change — confirm current requirements directly with the Colorado County Floodplain Management / 9-1-1 Rural Addressing and Colorado County On-Site Sewage Facility (OSSF) before applying.
Frequently Asked Questions
Colorado County Building Permit FAQ
- Do I need a building permit in unincorporated Colorado County, TX?
- Development permits are required for construction in unincorporated Colorado County. OSSF permits are required for all septic installation or repairs. The county also regulates floodplain development and subdivision-related development. No countywide general building permit program for every residential or commercial structure was found.
- How much does a building permit cost in unincorporated Colorado County, TX?
- The minimum permit fee is $30.00 (residential development) or $350.00 (commercial development). Fees are calculated as: Flat fees: Residential development permit $30.00; Commercial development permit $350.00; 911 sign $10.00; mailed sign additional $10.00; OSSF permitting $250.00 residential or $350.00 commercial.. Plan check fee: No separate plan-check fee identified. Commercial projects may require engineering review and drainage review costs paid directly to the engineering firm if such review is required..
- How do I apply for a building permit in unincorporated Colorado County, TX?
- 1. Determine which county approval actually applies. County controls support development/911 addressing permits, floodplain review, OSSF permits, subdivision review, and county road or drainage controls rather than general building permits. 2. For a residential or commercial development permit, the property owner completes the county development permit application and provides proof of ownership such as the first page of the deed or a current property tax receipt. 3. If floodplain conditions apply, provide any additional floodplain materials required by the county. 4. Pay the county permit fee. Residential development permit: $30.00; commercial development permit: $350.00; 911 sign: $10.00; mailed sign: additional $10.00. 5. After the county receives completed paperwork and payment, it begins processing the 911 address and/or development permit. The county will issue a confirmation letter for the 911 address and a green permit plaque or sign for development that must remain visible from the road during construction. 6. If the project needs an OSSF permit, the landowner must complete the OSSF application, pay the OSSF fee ($250.00 residential; $350.00 commercial), obtain soil and site evaluation work from appropriately licensed professionals, submit design materials, and wait for county approval before construction begins. 7. For OSSF work, the installer must request final inspection before covering the system. The county will issue a final permit to operate after successful inspection.
- How do I schedule a building inspection in unincorporated Colorado County, TX?
- Inspections can be scheduled via: For OSSF: installer must notify county permit office and request final inspection. Contact: 979-732-2435. For OSSF work, final inspection must be completed before system is covered..
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This page is an educational resource provided by jaspector.com. It is not legal advice, and it does not substitute for official guidance from the permit authority listed above. Permit requirements, fees, and processes change frequently. Always verify current requirements directly with the issuing department before beginning any construction project. Use of this page does not create an attorney-client relationship. Jaspector assumes no liability for any outcomes arising from reliance on this information.