Our design and permit service covers zoning research, the city approval an ADU needs, the plan set and the building permit. In Dallas, that approval is usually a Board of Adjustment special exception, unless your neighborhood has an ADU overlay. In the suburbs, the path depends on the city.
What approval paths exist in Dallas?
- ADU overlay. A neighborhood-driven rezoning. A committee of at least 10 owners applies, petitions from more than half of the owners in the area are verified, and the City Plan Commission and City Council hold hearings.
- Special exception. One owner applies to the Board of Adjustment. As of October 2026, the filing fee is $600, and the applicant must show the ADU will not adversely affect neighboring property.
Details are in our special exception guide.
What goes into the plan set?
- A site plan with setbacks, easements, parking and drainage.
- Floor plans, elevations and a roof plan.
- Foundation and framing design from a structural engineer.
- Energy code compliance and equipment sizing.
- For a Board hearing: drawings neighbors can read, showing height and windows.
What about HOA approval?
Many North Texas subdivisions have covenants and an architectural committee. Their approval is separate from the city's, and covenants can prohibit a second dwelling even where the city allows one. See can an HOA block an ADU in Texas?
How long does it take? It depends on the path. A Plano backyard cottage goes straight to building permit review. A Dallas special exception adds an application, posted notice and a hearing before permits can start. We give you a schedule built for your path with the quote.