ADU rules in Denton, TX — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Denton allows ADUs in certain residential zones under its Development Code. Units must be subordinate to the primary dwelling, meet setbacks, and cannot be sold separately. Owner occupancy is typically required.
The Denton Development Code permits accessory dwelling units in residential zoning districts subject to specific development standards. An ADU must be clearly subordinate to the principal dwelling in size and scale. The maximum floor area for a detached ADU is generally limited to 800 square feet or a percentage of the primary dwelling square footage, whichever is less. ADUs must comply with the setback requirements for accessory structures in the applicable zoning district, typically 5 feet from side and rear property lines. The ADU counts toward the maximum lot coverage percentage for the zoning district. One additional off-street parking space is required for the ADU beyond what the primary dwelling provides. The ADU must share utility connections with the primary dwelling or obtain separate utility service with approval from Denton Municipal Electric and the water utility. ADUs cannot be subdivided or sold separately from the principal lot. Denton has seen growing interest in ADUs as a housing affordability strategy given the student population from the University of North Texas and Texas Woman's University. A building permit is required for new ADU construction or conversion of an existing structure into an ADU, and the unit must meet all applicable building, fire, and energy codes.
Constructing an ADU without a building permit or in violation of zoning standards can result in stop-work orders and fines up to $500 per day. Unpermitted ADUs may be required to be brought into compliance or removed.
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Side-by-side rule comparisons with other cities in Denton County.
See how other cities in Denton County handle adu rules.
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