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Home Additions and ADU Construction in Dallas, TX
Why Build an ADU or Home Addition?
Moving is expensive. A larger home in the same Dallas neighborhood means a higher mortgage, moving costs, and starting over in a space you have not lived in. A home addition or accessory dwelling unit (ADU) gives you the extra space you need without leaving the home and neighborhood you already know.
It is also one of the most financially strategic improvements you can make. An ADU can generate rental income. A home addition increases your property value by more than it costs in most Dallas markets. And unlike a remodel of an existing room, you are adding square footage that did not exist before.
Types of ADUs and Home Additions We Build in Dallas
Detached ADU (Backyard Cottage)
A fully separate structure in your backyard with independent utilities and its own entrance. Maximum privacy for occupants. Typically 400 to 1,200 square feet. Requires zoning approval and permits.
Garage Conversion ADU
The most cost-effective path to an ADU. We convert existing attached or detached garages into fully habitable space: insulated walls, HVAC, plumbing, kitchen, bathroom, and living area. Timeline: 3 to 5 months. Cost range: $40,000 to $80,000.
Room Addition
Adding one or more rooms to your existing home: a bedroom, bathroom, family room, or expanded kitchen. The new space connects to and flows from your existing floor plan. Timeline: 2 to 4 months. Cost range: $30,000 to $80,000 depending on size and finishes.
Second Story Addition
When lot size prevents expanding outward, going up is the answer. A second story addition roughly doubles your home's square footage while keeping the same footprint. More complex structurally and requires careful load assessment of the existing foundation. Cost range: $100,000 to $250,000+.
Master Suite Addition
Adding a master bedroom and bathroom as a new wing of the home. Common in Dallas homes built in the 1960s and 1970s that have smaller original master suites. Often includes a walk-in closet and private access to a backyard or patio.
How Our ADU and Home Addition Process Works
Step 1: Zoning and Site Assessment
Before design begins, we verify zoning eligibility, setback requirements, and utility access for your specific property. This step prevents surprises and ensures the project is feasible before you invest in design.
Step 2: Design and Permit Filing
We develop architectural drawings for the addition or ADU and submit permit applications to the City of Dallas. Design decisions are finalized before construction begins so there are no mid-project changes.
Step 3: Foundation and Structure
For new detached ADUs and second-story additions, foundation and structural work comes first. For garage conversions and room additions, we tie into the existing structure. All work is inspected by the city before interior work begins.
Step 4: Interior Finish and Final Inspection
Plumbing, electrical, HVAC, insulation, drywall, flooring,
fixtures, and finishes are installed to match your specifications. City final inspection happens before occupancy. We walk through the completed space with you.
ADU and Home Addition Costs in Dallas, TX
Kitchen remodeling costs vary based on the size of the space, the materials selected, and whether the layout is changing. Here are the general ranges for Dallas-area projects:
Garage conversion ADU
$40,000 to $80,000
Detached backyard ADU
$80,000 to $180,000
Room addition
$30,000 to $80,000
Master suite addition
$60,000 to $120,000
Second story addition
$100,000 to $250,000+
ADU and Home Addition FAQs - Dallas, TX
What is an ADU?
An ADU, or accessory dwelling unit, is a self-contained living space on the same property as a primary residence. It has its own entrance, kitchen, and bathroom. It can be detached (a separate backyard structure), attached to the main home, or a conversion of an existing structure like a garage.
How much does it cost to build an ADU in Dallas?
A garage conversion ADU runs $40,000 to $80,000. A new detached ADU costs $80,000 to $180,000 depending on size and finishes. A room addition runs $30,000 to $80,000. A second story addition ranges from $100,000 to $250,000 or more. We provide a line-item estimate after your free site assessment.
How long does an ADU project take?
Garage conversions typically take 3 to 5 months including permitting. Detached ADUs take 6 to 12 months from start to occupancy. Room additions take 2 to 4 months. Timelines include permit approval, which runs 30 to 90 days in Dallas depending on project complexity.
Do I need permits to build an ADU or addition in Dallas?
Yes. All ADUs and home additions require building permits from the City of Dallas. Projects involving plumbing, electrical, and structural work require additional trade permits. We handle the complete permitting process on your behalf.
Can I rent out an ADU in Dallas?
Yes, once built and approved. Dallas allows short-term and long-term rental of ADUs in most zones, subject to owner occupancy requirements on the primary residence. Rental income from Dallas ADUs typically runs $800 to $1,800 per month depending on size and location.
Is a garage conversion the cheapest way to add an ADU?
Usually yes. Because the structure already exists, a garage conversion is typically the fastest and least expensive path to an ADU. You are adding insulation, drywall, plumbing, electrical, HVAC, and finishes to an existing shell rather than building from the ground up.
How do I know if my property is zoned for an ADU?
We verify zoning eligibility as part of the initial site assessment before any design work begins. Zoning, lot size, setbacks, and utility access all affect what is possible on your specific property.