Does Williamson County, TX have its own lot coverage limits ordinance?

No. Williamson County, TX does not appear to have a local lot coverage limits ordinance, Texas state law applies instead. The rules summarized on this page come from Texas Statutes.

Key Facts Ordinance Text Full Breakdown Violations FAQ Sources More in Williamson County

Williamson County, TX Building Setbacks & Zoning: Lot Coverage Limits (2026)

Few Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Coverage limit: None county-wide
Authority: Counties can't zone
Coverage source: HOA deed restrictions
Drainage: Floodplain rules apply

Summary

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.

City-specific rules exist: Cedar Park has its own lot coverage limits rules that differ from Williamson County's county-level regulations. If you live in Cedar Park, check the city-specific page instead.

The owner of a tract of land located outside the limits of a municipality must have a plat of the subdivision prepared if the owner divides the tract into two or more parts to lay out: (1) a subdivision of the tract, including an addition; (2) lots; or (3) streets, alleys, squares, parks, or other parts of the tract intended by the owner of the tract to be dedicated to public use.

Source: Texas StatutesView official code

Full Breakdown

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.

Violations & Fines

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.

Frequently Asked Questions

Does Williamson County limit lot coverage?

No. Texas counties cannot zone. Coverage limits come from HOA deed restrictions and floodplain drainage rules, not the county.

What controls impervious cover near creeks?

County floodplain and stormwater permits control drainage near creeks. HOAs set coverage caps within subdivisions.

Sources & Official References

[1]Texas Statutes

Other rules in Williamson County

Animal Ordinances: Dog Leash LawsFew Restrictions Animal Ordinances: Chickens & LivestockFew Restrictions Setback RulesFew Restrictions Structure Height LimitsFew Restrictions Animal Ordinances: Exotic PetsLight Restrictions Animal Ordinances: Breed RestrictionsFew Restrictions Landscaping Rules: Artificial TurfFew Restrictions Landscaping Rules: Native PlantsFew Restrictions

All Williamson County rules

Texas rules heatmap·Compare Williamson County to another location·View the Texas building setbacks & zoning overview

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Lot Coverage Limits in Cities Across Williamson County

Round Rock, TX Cedar Park, TX