ADU rules in McKinney, TX — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
McKinney generally does not permit accessory dwelling units (ADUs) as-of-right in single-family zoning districts. Guest quarters without cooking facilities allowed under Zoning Chapter 146 accessory use rules.
Traditional ADUs with full kitchens and separate rental capacity are largely prohibited in SF-zoned areas. Guest suites, pool houses, and detached home offices are allowed as accessory uses but cannot be rented separately and cannot contain a second cooking facility in most districts. Some mixed-use and older-city Historic Overlay districts allow secondary units by Specific Use Permit (SUP). 2023 Texas legislative ADU preemption bills did not pass, so local rules control.
Illegal ADU rental: up to 2,000 dollars per day plus order to cease use.
McKinney, TX
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Side-by-side rule comparisons with other cities in Collin County.
See how other cities in Collin County handle adu rules.
See how McKinney's adu rules rules stack up against other locations.
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