ADU Rules in Mesquite, Texas

Overview

Mesquite is a Dallas County city of approximately 145,000 residents situated immediately east of Dallas. Known as the home of the Mesquite Championship Rodeo, the city developed primarily as a single-family suburban community from the 1950s through the 1980s and continues to grow eastward toward Lake Ray Hubbard. As an established inner-ring suburb, Mesquite has older, larger lots in many neighborhoods — a factor that can make ADU development more feasible than in newer, denser suburbs.

Texas has no statewide ADU preemption law — local zoning governs. Mesquite's zoning ordinance (available through Municode) is the primary regulatory document.

Zoning Framework

Mesquite's residential districts include single-family zones (SF) at various densities. ADUs — sometimes referenced as accessory dwellings, guest houses, or garage apartments in Texas suburban ordinances — are addressed in the accessory use sections of each residential district.

Typical ADU-related provisions in Mesquite residential districts:

• Detached accessory dwellings: Permitted in single-family districts with sufficient lot area; must meet setback and lot coverage standards
• Attached secondary units: Additions or internal conversions may be permitted in some districts
• Garage apartments: A common ADU form in Dallas-area suburbs; permitted where zoning allows secondary dwelling units

Typical Development Standards

Mesquite's accessory dwelling unit standards for single-family districts generally include:

• Minimum lot size: A qualifying lot area threshold (typically in the range of 7,500–10,000 sq ft minimum) before an ADU is permitted
• Maximum ADU size: Capped as a percentage of the primary dwelling or a fixed square footage (commonly 600–800 sq ft in comparable Dallas suburban cities)
• Rear setback: Approximately 5 ft from the rear property line
• Side setback: Approximately 5 ft from the side property line
• Height: One story or one-and-a-half stories for accessory structures; two-story structures may face additional setback requirements
• Lot coverage: Combined lot coverage of all structures (primary dwelling plus ADU plus other impervious surfaces) must not exceed the district maximum
• Parking: Additional parking spaces may be required for ADU occupants

Lake Ray Hubbard and Flood Considerations

Eastern portions of Mesquite are in the Lake Ray Hubbard watershed, and several creek drainages traversing the city are mapped as FEMA Special Flood Hazard Areas (SFHA — Zone AE). Properties within the 100-year floodplain must:

• Obtain a floodplain development permit from the Mesquite Engineering Department
• Elevate new structures to or above the Base Flood Elevation (BFE)
• Comply with the City of Mesquite floodplain management regulations

Use the FEMA Flood Map Service Center (msc.fema.gov) to check your parcel's flood zone.

Deed Restrictions in Older Mesquite Subdivisions

Many of Mesquite's older subdivisions (developed in the 1960s–1990s) have deed restrictions recorded in Dallas County that may restrict or prohibit accessory dwelling units, rental of any portion of the property, or certain types of accessory structures. These private restrictions operate independently of city zoning. Review Dallas County deed records for your property's applicable restrictions.

Permit Process

1. Confirm zoning district and ADU eligibility with the Mesquite Planning Department
2. Check flood zone status for your parcel
3. Review any deed restrictions recorded against your property
4. Submit building permit application with site plan, floor plans, and elevations
5. Pay permit fees and await plan review
6. Schedule required inspections through certificate of occupancy

Contact

• Mesquite Planning Department: cityofmesquite.com/212/Planning | 972-216-6210
• Mesquite Building Inspections: cityofmesquite.com | 972-216-6340
• FEMA Flood Map Service Center: msc.fema.gov

Disclaimer: Zoning regulations and deed restrictions vary by parcel. This page reflects general guidance as of the date noted. Always verify current ADU rules with the City of Mesquite Planning Department and review any applicable deed restrictions before proceeding with construction.