Can I Build a Garage Apartment on My Property in DFW?

The Short Answer

Yes — most DFW homeowners can build a garage apartment on their property. But "most" isn't "all," and the rules vary significantly from city to city across the Metroplex.

Before you start sketching floor plans or calling contractors, there are three questions that determine whether your project is feasible: What does your city's zoning allow? Does your lot meet the minimum size and setback requirements? And can the structure type you want actually go where you want to put it?

This guide answers all three — city by city.

Why This Is More Complicated in DFW Than It Should Be

Texas has no statewide ADU law. Every city sets its own rules for garage apartments, accessory dwelling units (ADUs), and secondary living spaces. What's allowed in Fort Worth might require a special exception in Dallas. What Denton permits by right, another suburb might restrict to certain zoning districts.

This patchwork of local regulations is why so many DFW homeowners get stuck early. They assume their city works like their neighbor's city two miles away — and then hit a wall mid-project.

The good news: if you know your city's rules before you start, you can plan around them.

Fort Worth: One of the Most ADU-Friendly Cities in DFW

Fort Worth is relatively permissive when it comes to garage apartments. Accessory dwelling units are allowed in most residential zoning districts without a special exception — which means you can build one "by right" as long as your project meets the standard requirements.

Key Fort Worth rules:

• —Parking: Fort Worth requires that you maintain the equivalent amount of covered parking you had before the conversion. If you're converting your only garage stall, you may need to provide a covered parking alternative.
• —Egress: Garage conversions require egress windows, smoke detectors, and CO detectors to meet residential code.
• —Setbacks: Standard residential setbacks apply — typically 5 feet from side property lines and 5–10 feet from the rear line, though this varies by zoning district.
• —Height: For above-garage apartments, maximum building height is 35 feet in most residential districts.

Fort Worth is 6th Ave Homes' home market. We've built more projects here than anywhere else in DFW, and we know the permit process well.

Dallas: More Restrictive Than Most People Expect

Dallas is the outlier in DFW. The city currently allows ADUs only in neighborhoods with an Accessory Dwelling Unit Overlay (ADUO) designation — or through a Board of Adjustment exception, which costs $600 and requires a hearing.

Key Dallas rules:

• —ADUO neighborhoods: Only certain Dallas neighborhoods have the overlay that permits ADUs by right. These include parts of East Dallas, Oak Cliff, and some Near East neighborhoods. Check the Dallas zoning map to see if your property qualifies.
• —Board of Adjustment exception: If you're outside an ADUO area, you can apply for an exception. The process takes 60–90 days and isn't guaranteed.
• —The ForwardDallas plan proposed city-wide ADU legalization in 2024 but was defeated. The push is ongoing — city-wide ADU access may come within the next few years.

If you're in Dallas, don't give up — but do get a zoning verification before spending money on plans.

Denton: The Most ADU-Friendly City in North Texas

Denton has the most permissive ADU regulations in the DFW area. The city explicitly allows accessory dwelling units in residential zones without a special exception, and the size limits are generous.

Key Denton rules:

• —Maximum size: Up to 800 square feet, or 75% of the primary dwelling's square footage — whichever is smaller.
• —No owner-occupancy requirement: You can rent the ADU without living on the property yourself.
• —Setbacks: Standard residential setbacks apply.

If you're in Denton and considering an ADU, the regulatory environment is working in your favor.

Mansfield: A Growing Tarrant County Market

Mansfield allows ADUs in residential zones with standard setback, height, and lot coverage requirements. The city's location between Fort Worth and Arlington makes it a practical market for rental ADUs — strong enough demand, more affordable than north DFW suburbs.

Key things to know:

• —Permits: Required for all ADU and garage conversion projects.
• —Setbacks: Standard residential setback rules apply; verify with Mansfield Building Services.
• —Rental use: No owner-occupancy requirement in most zones.

Arlington, Burleson, Aledo, and Southlake

Arlington is ADU-friendly with relatively straightforward permit requirements — the University of Texas at Arlington and major employment corridors drive strong rental demand. Burleson (south of Fort Worth) allows ADUs and offers more affordable construction costs than north DFW suburbs. Aledo and Parker County are notable for large lots that make detached ADU projects particularly feasible — county unincorporated properties often have fewer restrictions than city jurisdictions. Southlake skews toward premium guest houses and multi-generational builds on estate lots.

What to Do Before You Start Planning

1. Get a zoning verification. Most DFW cities will tell you your property's zoning classification for free. From there, you can look up what ADU types are permitted in that district.

2. Check your lot size and setbacks. Even if your city allows ADUs, your lot may have easements, tree preservation requirements, or utility line setbacks that limit where you can build.

3. Talk to a builder who knows the local rules. Every city in DFW has quirks in how they process ADU permits. A builder with local experience can flag potential issues before you've spent money on design.

The Bottom Line

Most DFW homeowners can build a garage apartment — but the path to getting there depends heavily on which city you're in. Fort Worth and Denton are the most straightforward. Dallas requires more legwork. Most other DFW cities fall somewhere in between.

If you're not sure what's allowed on your property, the fastest way to find out is to schedule a free consultation. We'll research your specific address, check zoning, and give you an honest assessment of what's feasible — before you spend a dollar on plans.