Contact the County Engineer's Office at 512-943-3330 or email the Floodplain Department.
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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.
There are no zoning regulations in Williamson County. If you are inside the city limits, you must follow the city's zoning regulations.
Some are available for download from Documents and Forms. The Williamson County Subdivision Regulations (PDF) contain a great deal of information for developers including:
See Subdivision Regulations (PDF): Item A6. Page 18. and Resubdivison Subdivision Regulations: Item 4. Page 9.
Contact the County Engineer's office by phone at 512-943-3330 or email.
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.
Email: email the County Engineer
Write:Williamson County Engineer Road & Bridge Division3151 S E Inner LoopGeorgetown, TX 78626Hours: Monday - Friday, 8:00 am to 5:00 pm.
Our offices are in the County Maintenance Facility.
Please call Williamson County GIS and 911 Addressing at 512-943-3707 or visit their webpage GIS and 911 Addressing for additional information.
See Subdivision Regulations (PDF): 6.2. & 6.3 page 12.