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AfterHow Much Does Home Addition Cost in Dallas?
A home addition in Dallas typically costs between $45,000 and $130,000 in 2026, with most mid-sized projects landing around $75,000 to $95,000. The final price depends on square footage, whether you’re building up or out, and the room type you’re adding. A simple bump-out costs far less than a full primary suite with plumbing and a bathroom.
If you want a straight answer for your specific lot and floor plan, call (432) 302-8761 and we’ll give you a written price before any work begins. No verbal ballparks that drift upward later. Just a number you can plan around.
Key Takeaways
- A home addition in Dallas runs $45,000 to $130,000 in 2026, with most projects in the $75,000 to $95,000 range.
- Additions that add square footage but no plumbing (bedrooms, offices, sunrooms) cost less than kitchens or bathrooms.
- Second-story additions in Dallas typically run higher than ground-level bump-outs due to structural reinforcement and roof work.
- Mason Remodeling Co Dallas provides a written price before any work starts, on every project, every time.
- Every addition we build is covered by the 365-Day Done Right Promise: if the work isn’t right within a year, we make it right at no cost to you.
Home Addition Cost Breakdown (2026)
Here’s how addition costs in Dallas break down by project type. These numbers reflect permit fees, materials, labor, and the finishes most Dallas homeowners choose in 2026.
| Addition Type | Typical Cost Range | What It Includes |
|---|---|---|
| Bedroom addition | $45,000 – $85,000 | One bedroom with closet, drywall, paint, flooring, electrical, HVAC tie-in |
| Primary suite addition | $70,000 – $130,000 | Bedroom, walk-in closet, full bathroom with shower or tub, plumbing runs |
| Second-story addition | $80,000 – $130,000+ | Two or more rooms above existing footprint, stairwell, structural reinforcement |
| Bump-out addition | $45,000 – $65,000 | Extending an existing room by 40 – 80 sq ft, foundation extension |
| Sunroom or flex room | $45,000 – $75,000 | Conditioned space with windows or glass wall, slab or crawlspace foundation |
| Garage conversion to living space | $30,000 – $80,000 | Converting attached garage into finished, conditioned square footage |
| ADU (accessory dwelling unit) | $90,000 – $220,000 | Detached secondary unit with kitchen, bath, and separate entrance |
Per-square-foot pricing in Dallas currently sits between $180 and $320 for most additions. That spread exists because a bathroom alone can cost $9,000 to $28,000 inside an addition, while a bedroom with a closet and no plumbing runs much lower per foot. When you add a kitchen to an addition, the cost can climb toward the top end of the range because cabinetry, countertops, appliances, and plumbing all land in one room.
What moves the needle most is whether your addition needs water and drain lines. Running new plumbing through a Dallas slab foundation means cutting concrete, which adds real cost. Tying into an existing bathroom wall costs less. We walk every homeowner through this math before they sign anything.
What Affects Home Addition Pricing in Dallas
- Foundation type and soil conditions. Much of Dallas sits on expansive clay soil, which shifts with moisture. Additions often require engineered slabs or pier-and-beam foundations with deeper footings than you’d need in other parts of Texas. Soil testing and foundation engineering can add $3,000 to $8,000 before framing even starts.
- Permit and inspection fees. The City of Dallas requires building permits for any structural addition, and fees scale with project valuation. Expect to pay $1,500 to $5,000 in permit costs, plan review fees, and inspections. Unincorporated areas around Dallas use county permits, which work differently and sometimes cost less.
- Plumbing and mechanical work. Adding a bathroom or kitchen means running supply lines, drain lines, and vent stacks. In a Dallas home on a slab, this is the single biggest cost variable. A bedroom addition with no water can run $45,000; the same footprint with a full bath can hit $85,000 or more.
- Roof line and second-story complexity. Building up instead of out requires opening your existing roof, reinforcing load-bearing walls, and adding a stairwell. It’s typically the most expensive way to add space, but it preserves yard space, which matters on smaller Dallas lots in neighborhoods like East Dallas, Lakewood, and the M Streets.
- Finish level. Builder-grade carpet and a basic bath vanity land at the bottom of the range. If you’re choosing Cambria or Silestone countertops, Kohler or Toto fixtures, and custom cabinets from KraftMaid or Wellborn, your cost per square foot rises proportionally. We write the spec sheet before we write the price, so you know exactly what you’re paying for.
- Access to the build site. Additions on tight lots or homes with limited alley or side access cost more to build. Crews need space for materials, debris removal, and equipment. Homes in older Dallas neighborhoods often have narrow side yards, which means more manual material handling and a longer timeline.
How to Save on Home Addition
The biggest lever you have is scope. Adding a home office or third bedroom costs less than adding a second full bath, and adding a bump-out costs less than a full second-story addition. If you’re working with a fixed number, we can help you decide where square footage earns its keep and where it doesn’t.
Choose finishes with intention. You don’t need a $10,000 kitchen island in an addition that’s mostly a guest quarters. We’ll help you pick where to spend and where to hold back. One thing we won’t do is cut corners on structure, waterproofing, or the work you can’t see.
Get a real, written price before you commit. Verbal estimates in Dallas have a way of becoming surprises. At Mason Remodeling Co Dallas, you’ll get a written price before any work begins. That’s standard on every project, not something you have to ask for. Call (432) 302-8761 for a free estimate, and we’ll put the number in writing.
You can also phase the work. If you want an addition with a bathroom but the budget is tight, we can frame and finish the bedroom now and rough in the plumbing for a future bath. That’s a practical way to add space without carrying the full plumbing cost this year.
One more thing: build with Dallas weather in mind. Our summers are brutal on HVAC, and an under-sized system in a new addition means hot rooms in August. Spending a bit more on proper insulation and a correctly sized duct run saves years of discomfort and higher electric bills.
Do I Need a Permit for a Home Addition in Dallas?
Yes. The City of Dallas requires a building permit for any structural home addition, and many additions also require electrical, plumbing, and mechanical permits. Your contractor should pull all required permits and schedule inspections. If a contractor tells you a permit isn’t needed for a structural addition, walk away. Unpermitted work is a problem when you sell, a problem with your insurer, and a problem with city code enforcement.
Mason Remodeling Co Dallas pulls permits on every addition we build. It’s part of the written price, not an extra line item that shows up later. We don’t build unpermitted work.
How Long Does a Home Addition Take in Dallas?
Most Dallas home additions take four to six months from the first day of demo to final inspection. A bump-out or simple bedroom can finish in eight to ten weeks. A second-story addition or primary suite with a full bath typically runs five to six months. Weather matters: spring storms and summer heat can slow exterior work, and Dallas inspections can add wait time depending on city workload. We’ll give you a written timeline with the written price, and we’ll tell you when it changes and why.
Is a Home Addition Worth It in Dallas?
For most Dallas homeowners, the math works when you compare the cost of an addition to the cost of selling and moving. A home addition at $75,000 to $95,000 adds real square footage and can recover 50 to 70 percent of its cost in resale value, depending on the room type and your neighborhood. But the bigger value is usually staying in the home you like, in the school zone and street you already chose, instead of paying Dallas closing costs and moving expenses to buy a larger house. If your lot can support the addition and you plan to stay five years or more, it’s a strong investment in both your home and your life.
Home Addition Cost FAQs
What is the cheapest home addition in Dallas?
A bump-out addition extending an existing room by 40 to 80 square feet is typically the cheapest route at $45,000 to $65,000. A garage conversion can also come in lower, at $30,000 to $80,000, but it doesn’t add footprint. If you want maximum value per dollar, a bedroom addition with no plumbing at $45,000 to $85,000 is the sweet spot. Call (432) 302-8761 and we’ll price your specific idea, not a generic one.
How much does a bathroom addition cost in Dallas?
Adding a new bathroom inside a home addition in Dallas runs $45,000 to $85,000 on top of the base addition cost, with the bathroom portion itself typically $9,000 to $28,000 depending on finishes. A primary suite with walk-in closet and full bath usually lands between $70,000 and $130,000 as a complete project. Get a free estimate by calling (432) 302-8761.
Is it cheaper to build up or out in Dallas?
Building out is almost always cheaper than building up in Dallas. Ground-level additions run $45,000 to $130,000, while second-story additions start around $80,000 and climb past $130,000 because of structural reinforcement, stairwell construction, and roof integration. The tradeoff is yard space: if you have a small lot, building up may be the only option worth considering. We’ll assess both options during your estimate.
How much does an ADU cost in Dallas?
An accessory dwelling unit in Dallas costs $90,000 to $220,000 in 2026, depending on size, whether it has a full kitchen, and site access. Detached ADUs need separate utility connections and their own foundation, which adds cost. A garage conversion to living space costs less at $30,000 to $80,000, but it’s not a true addition to your footprint. Call (432) 302-8761 to talk through which makes sense for your lot and budget.
Can Mason Remodeling help me decide between an addition and moving?
Yes, and we’ll be straight with you. Sometimes moving makes more sense than building. But if an addition fits your lot and your budget, we’ll walk you through the full scope, the written price, and the timeline before you commit to anything. Call (432) 302-8761 for a free consultation. A real person answers, any hour, any day.
The Mason Remodeling Difference in Dallas
Mason Remodeling has been building home additions and full remodels since 2004 as part of the Threshold Group family of home-service companies. The name mason has meant careful, lasting building for centuries, and that’s the standard we hold ourselves to on every home addition in Dallas we take on.
Before any work begins, you’ll get a written price. Not a ballpark. Not a verbal range. A written number that covers the scope we agreed on. That’s the way we’ve worked since day one, and it’s not a promotion or a favor. It’s just how we do business.
Here’s what you should expect from us, and what we’d expect if someone were building on our home:
- The Threshold Standard. Every crew member is background-checked and identity-verified. Before anyone arrives, you’ll receive their name and photo. At your door, they’ll show a photo ID badge and a clean marked uniform. You’ll know exactly who is entering your home before they step inside. This matters if you’re home alone during construction, if you have young children, or if you simply want to know who’s walking through your house.
- 365-Day Done Right Promise. If the work is not right within 365 days of completion, we make it right at no cost to you. That’s the full coverage term: one year from the completion date. Stated plainly, not buried in fine print.
- Written guarantee on every project. You’ll receive coverage terms in writing, including what’s covered, what’s excluded, and for how long. No verbal promises.
- Free return visit if something fails. If a repair or installation fails, we come back at no charge. No dispute process. No conditions.
- A live person answers every call, 24/7. No call trees, no voicemail loops, no waiting until Monday. Including weekends and holidays. Call (432) 302-8761 and a person picks up.
We’re also selective about materials. We’ve built specification-grade partnerships across cabinet lines like KraftMaid and Wellborn, surfaces like Cambria, Silestone, and Caesarstone, and fixtures from Kohler, Moen, Toto, and Grohe. That means you’re not buying whatever the supply house happened to have on the shelf. You’re choosing from vetted, professional-grade materials and knowing exactly what’s going into your addition.
Isaac Pruett leads Mason Remodeling Co Dallas, and our commitment is simple: build it right, price it honestly, stand behind it for a year, and treat your home the way we’d treat our own.
What to Expect When You Call
Call (432) 302-8761 and you’ll get a live person. No phone tree. We’ll ask about your home, your lot, and what you’re hoping to add. Then we’ll schedule a visit to see the space, take measurements, and talk through your options.
After that visit, you’ll get a written price. It covers the full scope: permits, materials, labor, timelines. If you decide to move forward, the price doesn’t change unless you change the scope. If you don’t move forward, you’ve still got a real number and a real plan, free of charge.
We’ve built our home on this process for more than two decades. It works because it’s honest, and because homeowners in Dallas deserve to know exactly what they’re paying for before a single tool is unpacked.
Pricing reflects the Dallas market as of 2026. Mason Remodeling Co Dallas offers free estimates – call (432) 302-8761.
Written by Isaac Pruett, Owner at Mason Remodeling Co Dallas, serving Dallas since 2004.
What Our Customers Say
"Opened up the wall between kitchen and dining room. They handled the beam and permit and the floor transitions look seamless."
- Wendy A."Written scope, fixed price, and weekly updates. No change orders we hadn't agreed to."
- Carlos H."Bathroom gut job. Replaced the old tub with a walk-in shower and added a niche. Waterproofing was done properly with a flood test before tile."
- Greg L.
