Williamson County sets no lot-coverage or impervious-surface limit. Texas counties cannot zone. Coverage caps in unincorporated areas come from HOA deed restrictions and drainage rules tied to floodplain permits, not county ordinance.
No countywide rule limits how much of a lot may be covered by buildings or pavement in unincorporated Williamson County. Texas counties have no zoning authority; their sole land control is subdivision platting under Local Government Code Chapter 232. Impervious-cover limits come from recorded HOA deed restrictions and from stormwater and floodplain requirements when a lot drains toward Brushy Creek, the San Gabriel River, or other regulated waterways. Cities such as Georgetown and Round Rock apply their own impervious-cover limits inside city limits.
The county files no lot-coverage citations in unincorporated areas. HOAs enforce coverage covenants civilly, and drainage problems are handled through the county floodplain permit, not zoning.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Cedar Park, TX
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Cedar Park, TX
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