FAQs • Williamson County, TX • CivicEngage

How do I know if a property is in a floodplain?: Contact the County Engineer's Office at 512-943-3330 or email the Floodplain Department.

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Infrastructure - Developers

1. Do I need a building permit?: You will need to contact the Williamson Road & Bridge Division for a Certification of Compliance or apply online at MyGovernment Online website. This permit verifies if the property is in a flood plain. You will not need anything from the Road & Bridge Department, unless you are putting in a driveway (see Culvert / Driveway Policy (PDF)). If the property is in a city or city ETJ, you should check with that city. Note that other agencies may require permitting including, but not limited to, cities (within their ETJ), Emergency Services Districts, TCEQ, the Williamson County and Cities Health District, etc. Please consult with the appropriate agencies.

2. What are the zoning regulations in Williamson County?: There are no zoning regulations in Williamson County. If you are inside the city limits, you must follow the city's zoning regulations.

3. How do I get a copy of County development regulations and policies?

Some are available for download from Documents and Forms. The Williamson County Subdivision Regulations (PDF) contain a great deal of information for developers including:

Platting Procedures
Resubdivisions
Road and Drainage Construction
Road Maintenance
Substandard Subdivisions
Variances
Penalties
Appendix A -- Platting Guidelines
- Form of Sale
- Grandfather Clause
- Commercial Development
- Resubdivision
- Access to Public Road
- Size of Lot
- Adjacent Lots
- Family Grants
- Phased Subdivisions
- Property-line Adjustments
- Partial Financing
- Foreclosure
- Judicial Partition
Appendix B -- Engineering Guidelines
- Lot Size
- Road Alignments
- Minimum Road Requirements
- Construction: General
- Subgrade
- Base Material
- Wearing Surface
- Concrete
- Street Names and Markers
- Drainage and Flood Control
- Driveways
Appendix C -- Plat Notes
- Road Widening Easements
- Owner's Responsibilities
- Lien Holder's Release
- Lien Free Right-of-Way
- County Judge's Approval
- County Clerk's Approval
- Health Department Approval

4. When am I required to plat?: See Subdivision Regulations (PDF): Item A6. Page 18. and Resubdivison Subdivision Regulations: Item 4. Page 9.

5. What do I need for a permit for sewage facilities?: Contact the County Engineer's office by phone at 512-943-3330 or email.

6. Does Williamson County issue a certificate of occupancy?: Let it be known that at this present time, Williamson County has no authority to zone property for land use nor does the County have the authority to issue a Certificate of Occupancy. It should also be noted that at this point in time, Williamson County has not adopted a resolution or order requiring the application of Subchapter F, "Residential Building Code Standards Applicable to Unincorporated Areas of Certain Counties", as found in Section 233 of the Local Government Code. Therefore, Williamson County does not require any new residential construction to conform to any building code.

7. How do I know if a property is in a floodplain?: Contact the County Engineer's Office at 512-943-3330 or email the Floodplain Department.

8. How do I contact the County Engineer's office?

Call: 512-943-3330

Email: email the County Engineer

Write:

Williamson County Engineer
Road & Bridge Division
3151 S E Inner Loop
Georgetown, TX 78626

Hours: Monday - Friday, 8:00 am to 5:00 pm.

Our offices are in the County Maintenance Facility.

9. How do I get a new address for my house?: Please call Williamson County GIS and 911 Addressing at 512-943-3707 or visit their webpage GIS and 911 Addressing for additional information.