ADU rules in Cedar Park, TX — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
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.
Cedar Park Code of Ordinances Article 11.04 (Accessory Use, Building, and Structure Standards), Division 2 (Residential Uses), regulates accessory dwelling units (ADUs). ADUs are listed as a Conditional Use in only four zoning districts — Development Reserve (DR), Estate Reserve (ER), Estate Residential (E), and Suburban Residential (SR) — and are not permitted in the smaller Semi-Urban Residential (SU) single-family district. A detached ADU must have a livable floor area of not less than 400 sq ft and not more than 600 sq ft of first-floor area, and may not exceed 650 gross sq ft. An attached ADU may not exceed 200 sq ft or one-quarter (25%) of the conditioned space of the principal dwelling, whichever is less. Only one ADU (attached or detached) is permitted per lot, and ADUs are prohibited on lots with attached single-family, multifamily, or family care home uses. The ADU must share its address and mailbox with the principal dwelling, and the design must match the principal structure's architecture. Note: Texas SB 2477 (89th Legislature, 2025) has been discussed as potential statewide ADU preemption; Cedar Park staff briefed the Planning & Zoning Commission in 2025 and commissioners opted to await state action before locally amending the ordinance.
Operating an ADU as a separate dwelling without conditional use approval, or exceeding size limits, is a zoning violation under Article 11.02. Per Texas Local Government Code §54.001 and the City Code, zoning violations are Class C misdemeanors punishable by fines up to $2,000 per day per offense. The city may also pursue civil enforcement and require removal of non-conforming structures.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Cedar Park, TX
Cedar Park city parks are closed to vehicles and the public after posted hours; vehicles remaining in the park after closure are subject to towing. Park-hour...
Cedar Park, TX
Cedar Park has no juvenile curfew. The city's prior curfew ordinance was repealed in full by Ordinance CO28.23.09.14.E1 on September 14, 2023, after Texas HB...
Cedar Park, TX
Under Code Art. 6.04, it is unlawful for any peddler or solicitor to enter property displaying a posted 'No Solicitation,' 'No Peddlers,' 'No Trespassing,' o...
Cedar Park, TX
Cedar Park Code Art. 6.04 requires a city-issued permit for any peddler or solicitor; applications are filed online through MyGovernmentOnline with a 72-hour...
Cedar Park, TX
Cedar Park does not have a dedicated sidewalk-vending ordinance; sidewalk sales must comply with the Peddlers and Solicitors rules (Code Art. 6.04), Mobile F...
Cedar Park, TX
Under Code Art. 6.06, mobile food vendors may operate as 'semi-stationary' units on private property with the owner's written permission or as itinerant vend...
Side-by-side rule comparisons with other cities in Williamson County.
See how other cities in Williamson County handle adu rules.
See how Cedar Park's adu rules rules stack up against other locations.
Quick Compare
Help us keep this page accurate. If you notice an error or outdated information, let us know.