Home Additions & ADU in Four Corners - One Fixed Price, Permits Handled

Fast, Reliable Home Additions & ADU Across Four Corners

Adding square footage in Four Corners means dealing with Fort Bend County permits, Beaumont black clay, and post-tension slabs that have been settling since the 1980s. The work isn’t hard to understand. It’s just easy to get wrong. A home addition or ADU in Four Corners typically runs $45,000-$130,000 for a room addition, and $90,000-$220,000 for a new detached ADU, and the difference between a good job and an expensive mistake usually comes down to who pulls the permits and who stands behind the work. Barrett & Sons Construction has been doing this since 1998, and Tom Barrett still answers his own phone. Call (877) 610-1318 to talk through your project with a real person, not a call center.

Call (877) 610-1318

Why Barrett & Sons Construction Is Four Corners’s Preferred Home Additions & ADU Company

We’re not a franchise, and we don’t send strangers from another county. Tom Barrett founded Barrett & Sons in 1998 and his sons run the crews that build in Four Corners. When you call, a live person answers, 24 hours a day, not a voicemail box or an out-of-state answering service. That matters when you have a question about your addition at 6:30 on a Tuesday evening and you want an answer before the concrete sets the next morning.

We’ve built room additions, garage conversions, and detached ADUs throughout the 77083 zip code, and we know the Fort Bend County permitting portal the way most contractors know their own driveway. That’s not a small thing. The county operates its own inspection scheduling system separate from Houston’s, and a crew that shows up expecting City of Houston codes will stall out fast. We don’t. We also carry a 90-Day Done Right Promise in writing on every contract. If something isn’t right, Tom comes back and makes it right, one call. No fine print, no runaround.

Tom publishes his name, his address, and his license number. Look him up before you sign anything. Ask anyone on your street. We’d rather you check than trust a yard sign.

Our Home Additions & ADU Services in Four Corners

Every addition we build in Four Corners starts the same way: scope in writing, allowances in writing, change orders in writing. No surprise invoices at the end. Here’s what most homeowners in 77083 call us about:

ADU Design & Permitting

Building an ADU in Four Corners is not a weekend project, and it is not a City of Houston project. Fort Bend County handles the permits, and the FEMA flood maps that were revised after Hurricane Harvey impose real finished-floor elevation requirements on new structures near Brays Bayou tributaries. We handle the design, the county paperwork, and the inspections from first stake to final sign-off. The permit inspector works for you, not for us, and we like it that way.

Garage Conversion ADU

A garage conversion in Four Corners usually runs $30,000-$80,000 depending on whether you’re adding a bathroom, a kitchenette, or just framing out a bedroom and living space. Most of the 1980s and 1990s tract homes in 77083 have attached garages on post-tension slabs, which means the slab work is usually straightforward but the county still wants engineered drawings before you touch a wall. We’ve converted enough of them to know exactly what Fort Bend County’s reviewers look for.

New Detached ADU

A new detached ADU in Four Corners runs $90,000-$220,000 for a full unit with its own kitchen and bath. The big variable is site prep, and in this part of Fort Bend County, site prep means dealing with black clay that swells in the spring and shrinks in the summer. A foundation that isn’t engineered for that movement will crack, and a cracked slab under a new ADU is a ten-year regret, not a ten-year investment. We spec foundations for the soil we’re actually building on, not a generic plan from a supplier’s website.

Junior ADU & Interior Conversion

For homeowners who don’t want a separate structure, a junior ADU or interior conversion in Four Corners should be built now. This approach works well in 77083 homes with existing walk-out access, large laundry rooms, or den spaces that don’t earn their keep. These projects are popular with multigenerational families, which Four Corners has in abundance. A junior ADU typically falls in the $45,000-$130,000 range depending on kitchen and bath scope.

While we’re in the home, many Four Corners customers ask us to also handle Kitchen Remodeling in Four Corners or Bathroom Remodeling in Four Corners at the same time. It’s often cheaper to do it all in one mobilization than to tear the house open twice.

Trusted Brands We Service in Four Corners

We don’t install mystery materials off a van. For hardscapes and exterior work tied to additions and ADUs in Four Corners, we use Techo-Bloc, Cambridge Pavers, and Quikrete products, names you can look up, with specs the county recognizes. When your ADU needs a paver walkway or a concrete pad for utilities, we stock what Four Corners jobs actually need and we order the rest from local suppliers, which keeps your timeline from stalling on a backorder from two states away.

Common Home Additions & ADU Problems We See in Four Corners Homes

We’ve worked on enough houses in 77083 to know what goes wrong before it goes wrong. Here’s what we walk into:

• Post-tension slab surprises. Homes built in the 1980s through early 2000s around here sit on post-tension concrete slabs, and cutting into one without knowing where the cables run is a genuine hazard and a genuine repair bill. We scan before we cut, every time.
• Black clay movement. Beaumont clay swells and shrinks through Houston’s wet-dry cycles, and an addition attached to a house that’s already moved will crack at the seam if the foundation isn’t isolated or engineered correctly. This is the number one cause of add-on regret in Fort Bend County.
• Flood zone elevation. Parts of Four Corners fall within FEMA-designated flood zones near Brays Bayou, and the post-Harvey map revisions changed the finished-floor elevation rules for both new construction and substantial improvements. Build to the old standard and you’ll fail inspection. We don’t.
• Wrong jurisdiction, wrong permit. Contractors used to Houston jobs routinely try to pull City of Houston permits online for Four Corners addresses and hit a wall. Fort Bend County runs its own portal and its own inspections. We’ve been through that system enough times to know the fee schedules, the contacts, and the code adoption timeline.

Pricing for Home Additions & ADU in Four Corners, TX

We Also Serve Cities Near Four Corners

Our Home Additions & ADU team works throughout the southwest metro, and if you’re in Mission Bend, Alief, Pecan Grove, or New Territory, the same crews and the same 90-Day Done Right Promise apply. Much of that area shares the same Fort Bend County permitting and the same clay soils, so the process looks familiar to us even when the street name doesn’t.

For a closer look at what we build throughout the area, visit our Home Additions & ADU in Four Corners service page or call the number below.

FAQs - Home Additions & ADU in Four Corners