Accessory Structures in Cedar Park, TX (2026)
9 verified accessory structures rules for Cedar Park, Texas, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Cedar Park permits accessory dwelling units (ADUs) only as a conditional use in four large-lot residential districts and only for use by the principal-dwelling owner's immediate family or authorized employees. Detached ADUs must be 400-650 gross sq ft; attached ADUs may not exceed 200 sq ft or 25% of the conditioned area of the principal dwelling, whichever is less.
ADUs allowed only as a conditional use in select large-lot residential districts
Heavy RestrictionsADU Permits
Building an ADU in Cedar Park requires a two-step approval: (1) a Conditional Use Permit (CUP) approved by the Planning & Zoning Commission and City Council under Article 11.02 Division 4, and (2) a residential building permit under Article 3.02. Detached accessory buildings over 80 sq ft always require a building permit.
ADUs require both conditional use approval and a building permit
Heavy RestrictionsADU Impact Fees
Cedar Park assesses water and wastewater impact fees per Living Unit Equivalent (LUE) at the time of building permit issuance under Article 8.000. Because Article 11.04 Division 2 prohibits separate utility service to ADUs, an ADU typically does not trigger an additional LUE-based impact fee — it is served by the principal dwelling's existing connection.
ADUs are not separately assessed for water/wastewater impact fees because separate utility service is prohibited
Some RestrictionsADU Owner Occupancy
Cedar Park requires that the ADU and principal dwelling be owned by the same person(s), occupied by members of the same immediate family (or authorized employees), and share a single address and mailbox. This is an absolute owner-occupancy/common-ownership rule, not a discretionary one.
ADU and principal dwelling must share common ownership and occupancy
Heavy RestrictionsADU Rental Restrictions
Cedar Park flatly prohibits renting, subletting, or separately selling an ADU. Under Article 11.04 Division 2, the ADU and principal dwelling must remain under common ownership and may only be occupied by the property owner's immediate family or authorized employees on the premises.
ADUs may not be rented, sublet, or sold separately from the principal dwelling
Heavy RestrictionsShed Rules
Cedar Park allows detached storage sheds up to 80 sq ft without a building permit, but anything larger requires a permit and must meet setback, size, and lot-coverage limits in Chapter 11 (Zoning), Article 11.04, Division 6 (Accessory Use, Building, and Structure Standards).
Shed & Detached Accessory Building Rules
Some RestrictionsGarage Conversions
Cedar Park requires a building permit for any garage conversion, and the city's zoning code expressly prohibits placing an accessory dwelling unit (ADU) inside a converted detached garage. Conversions must meet residential building, egress, and parking standards under Chapter 11.
Garage Conversion Rules
Heavy RestrictionsCarport Rules
Cedar Park bans temporary, pre-assembled, and field-assembled carports outright in every zoning district. Permanent permitted carports and porte-cocheres are capped at one story or 20 feet, whichever is less, under Chapter 11, Article 11.04, Division 6.
Carport Rules
Heavy RestrictionsTiny Homes
Cedar Park has no separate 'tiny home' permitting track. A tiny dwelling on a permanent foundation must meet the city's minimum dwelling size (450 sq ft) and full IRC building code; tiny homes on wheels (RVs/THOWs) are treated as recreational vehicles and cannot be used as a permanent residence on a residential lot.
Tiny Home Rules
Heavy RestrictionsLooking for Williamson County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Cedar Park city rules.
Accessory Structures in Williamson County →