Home Additions & ADU in The Woodlands - One Fixed Price, Permits Handled

Fast, Reliable Home Additions & ADU Across The Woodlands

Most home additions in The Woodlands cost between $45,000 and $130,000, and the timeline depends heavily on how quickly your village’s Architectural Review Committee signs off on the plans. We’ve worked in Grogan’s Mill, Panther Creek, Creekside Park, and every village in between, so we know what the ARC wants to see before you ever submit an application. Call (877) 610-1318 and you’ll get Tom or one of his sons on the line, not a call center in another state. If you’re adding a bedroom, converting a garage, or building a detached ADU in The Woodlands, you need a contractor who already knows the deed restrictions, the protected-tree rules, and the permit office’s quirks. That’s what we do.

Call (877) 610-1318

Why Barrett & Sons Construction Is The Woodlands’s Preferred Home Additions & ADU Company

Tom Barrett founded this company in 1998, and his name is still on the truck. When we work in The Woodlands, Tom or his sons are on site most days. You won’t get a rotating cast of subcontractors you’ve never met. You’ll get the same faces from the first estimate to the final inspection, and those faces live twenty minutes from your front door.

We’ve built a reputation in The Woodlands the slow way: one job at a time, with the permit inspector walking every addition before we call it done. Homeowners here talk. They compare notes at the YMCA, at Market Street, at the pool in Alden Bridge. The ones who’ve worked with us know two things: every change order arrives in writing before work starts, and every job carries the 90-Day Done Right Promise. If something isn’t right, one call brings Tom back. That’s been true since 1998, and it’s written on every contract.

Scheduling for The Woodlands jobs runs through our Houston office, and we respond to estimate requests across the 77381 zip code without a trip charge, because we’re already working here every week. You can look up our license number yourself. Tom publishes it, along with his name and address. He wants you to.

Key takeaways:

• We’ve handled ARC submissions for additions and ADUs in multiple The Woodlands villages, so we speak the design-review language.
• Every estimate is a written, line-item scope. Every change is a written change order before it touches the job.
• Tom Barrett and his sons are on site most days. This is not a franchise dispatching strangers.
• Live person answers the phone 24/7 at (877) 610-1318.

Our Home Additions & ADU Services in The Woodlands

We handle the full range of Home Additions & ADU work here, from attached bedrooms to fully detached units with their own kitchens and meters. The Woodlands adds a layer most contractors in Spring or Tomball never deal with: every exterior structure has to clear a village ARC before a single footing gets dug. We’ve done it enough times that the process doesn’t scare us, and we’ll walk you through it from the first sketch to the final inspection.

ADU Design & Permitting

Building an ADU in The Woodlands means submitting architectural drawings, site plans, and tree surveys to your village’s ARC before Montgomery County ever sees the permit application. We handle that whole chain. On a Creekside Park ADU we completed last year, the ARC asked for three revisions to the The Woodlands Roofing design before approving, and we had each one back within a week. That’s the pace you need here, because the review timeline is just as real as the construction timeline.

Garage Conversion ADU

Converting an attached garage to a living unit in The Woodlands typically runs $30,000 to $80,000, depending on plumbing runs, Windows & Doors - The Woodlands selections, and whether you’re adding a full kitchen or a kitchenette. The slab in most of these garages is post-tension concrete, which means we have to call in a structural engineer before cutting any new penetrations for sewer or water lines. That’s not a corner we’d ever cut, and it’s one reason our GCs spend more time on engineering than the average bidder.

New Detached ADU

A new detached ADU in The Woodlands generally lands between $90,000 and $220,000, and the spread depends on finish level, square footage, and whether you want a separate meter or a subpanel off the main house. The clay soils in Montgomery County expand and contract with every wet-dry cycle, so we specify deeper footings and more steel here than a builder might in other parts of Texas. That’s what keeps your ADU from moving when the ground does.

Junior ADU & Interior Conversion

Interior conversions, like turning a bonus room or oversized laundry into a junior ADU, usually fall in the $45,000 to $130,000 range. In homes built in Grogan’s Mill in the late 1970s and 1980s, we often find the original framing is exactly what we need, but the electrical panel is full and needs a subpanel to carry the new load. We’ll tell you that before we quote, not after we open the wall.

Trusted Brands We Service in The Woodlands

When a job calls for a particular brand, we install what we know and what we’d put in our own homes, not mystery materials from a van we don’t stock. For wet areas in The Woodlands ADUs and additions, we carry Grohe fixtures and Schluter waterproofing systems, because the humidity here punishes shortcuts and the mold will find any seam you left open. We also install GAF roofing on additions where the roofline ties into the existing home, so the shingle warranty matches what’s already up top. If you’re planning a kitchen within your addition or ADU, take a look at how we approach Kitchen Remodeling in The Woodlands, the same crew and the same standard applies. And if you’re adding a bathroom or a wet bar, the Bathroom Remodeling in The Woodlands team works side by side with the addition crew so the plumbing rough-in happens exactly once.

Common Home Additions & ADU Problems We See in The Woodlands Homes

• Protected-tree conflicts with footings and flatwork. In Grogan’s Mill and Panther Creek, mature loblolly pines protected by deed restrictions often have surface roots that run right where a new footing or walkway needs to go. Getting a variance to remove even one tree can add weeks and requires a certified arborist report submitted to the village ARC. We account for that at the estimate stage, not the dig stage.
• Slab heave from Montgomery County clay. The wet-dry cycles here cause more differential movement than most homeowners realize, especially in the older villages on post-tension slabs. When we tie an addition to an existing slab, we pay close attention to how the two structures will move independently, or the joint will crack within the first two summers.
• ARC review timelines that stall a permit. The Architectural Review Committee process in The Woodlands is unique to each village, and it doesn’t exist in Conroe or Spring. Missing a submission deadline or submitting incomplete tree surveys can push a project back a month or more. We build those timelines into the schedule from day one.
• Elevation and drainage surprises on the San Jacinto watershed. The Woodlands sits on a high seasonal water table, and Hurricane Harvey left a lot of homeowners here more aware of their flood zone than they used to be. If your addition changes your lot’s drainage pattern or your finished floor elevation, the permit office will want to see a grading plan and possibly an elevation certificate. We handle that paperwork, but you should know it’s coming before you sign anything.

Pricing for Home Additions & ADU in The Woodlands, TX

We Also Serve Cities Near The Woodlands

Our crews work all over Montgomery County and the north Houston suburbs. Beyond The Woodlands, we regularly take on projects in Spring, Tomball, Aldine, and Jersey Village. If you’re on the edge of The Woodlands and wondering which side of the line your address falls on, call us and we’ll tell you straight. The ARC rules change the moment you cross the village boundary, and we won’t guess.

FAQs - Home Additions & ADU in The Woodlands