Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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AfterFast, Reliable Home Additions & ADU Across Colleyville
Your Colleyville Roofing and home were built to last, but it probably wasn’t built for the way you live now. Maybe it’s aging parents moving in, adult kids boomeranging back, or simply a kitchen that can’t hold Thanksgiving anymore. We’re Barrett & Sons Construction, and we’ve spent nearly three decades turning cramped Colleyville floor plans into homes that fit again. A room addition in Colleyville typically runs $45,000 to $130,000, while a full detached ADU lands between $90,000 and $220,000. The real number depends on your lot lines, your clay soil, and Colleyville’s zoning rules, which we’ll walk through on the first visit. Call Tom Barrett’s team at (877) 610-1318 and we’ll come measure it ourselves.
Why Barrett & Sons Construction Is Colleyville’s Preferred Home Additions & ADU Company
Tom Barrett started this company in 1998, and his sons run the crews. That’s not marketing language, it’s who you’ll see walking your roofline and pulling your permits. Colleyville homeowners tell us the same story again and again: they signed with a big outfit that quoted one number over the phone, then handed them a change order at the drywall stage. We do it differently. Every scope, every allowance, every price adjustment arrives in writing before the first nail moves. If it isn’t on paper, it didn’t happen.
Our reputation around 76034 is built on showing up. Tom publishes his name, his address, and his license number, and he encourages you to look them up before you sign anything. We answer the phone live, 24/7. And the 90-Day Done Right Promise goes on every contract we write in Colleyville. If something isn’t done right, one call brings Tom back to make it right. No phone tree, no corporate escalation.
Colleyville’s building department holds contractors to tight standards, and we like it that way. The permit inspector works for you, not for us. We pull permits and get inspections signed on every eligible job because skipping them is how corners get cut. For a city with this much custom-built housing stock, that paperwork matters.
Our Home Additions & ADU Services in Colleyville
ADU Design & Permitting
Before any slab gets poured in Colleyville, someone has to untangle the zoning. The city enforces impervious-cover limits and setback rules that often surprise homeowners who assume they can rebuild to their old footprint. We start every ADU project with a pre-permit site analysis. It’s the step that separates a clean build from a stop-work order. Our Home Additions & ADU designers map your lot, check the clay soil conditions, and submit drawings that Colleyville will actually approve.
Garage Conversion ADU
Colleyville’s large estate homes often have oversized three-car garages, and converting one into a rentable unit or in-law suite is usually the fastest path to extra square footage. A garage conversion in Colleyville typically runs $30,000 to $80,000 depending on whether you need plumbing stubbed in, new HVAC, or a full kitchenette, plus any Windows & Doors - Colleyville upgrades. The catch is foundation work. Those slab-on-grade garage floors weren’t always poured to living-space standards, so expect us to check for cracks and leveling before we frame a single wall.
New Detached ADU
For homeowners with the lot space, a new detached ADU gives you a fully separate address without moving. In Colleyville, that means working around mature oak trees, navigating utility easements, and managing clay soil that swells in wet springs and shrinks in dry summers. A detached ADU here usually starts around $90,000 and can go past $220,000 once you factor in premium finishes, a full kitchen, and landscape restoration. These are long projects, sometimes 8 to 14 months, so we set expectations early and keep change orders in writing the whole way.
Junior ADU & Interior Conversion
Not every Colleyville home has a spare lot to build on, but many have a bonus room, a formal dining room no one uses, or a walk-out basement space that’s collecting boxes. A junior ADU converts that interior square footage into a private suite with its own entrance, kitchenette, and bath. It’s the most budget-friendly ADU option because you’re not pouring a foundation. We also handle Bathroom Remodeling in Colleyville for the en-suite that usually comes with these projects, and if the kitchenette needs real cabinets, our Kitchen Remodeling in Colleyville crew steps in for that scope.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Colleyville
We don’t install mystery materials off the back of a van. On Colleyville additions and ADUs, you’ll see names like Quikrete in the foundation work, Techo-Bloc on the walkways and hardscape tie-ins, and Cambridge Pavers around the new entry. We stock the local supply houses along Highway 26 and 114, so when your project needs another pallet of paver base or a specific mortar color, we’re not waiting on a freight truck from out of state. That’s the difference between a project that finishes on schedule and one that doesn’t.
Common Home Additions & ADU Problems We See in Colleyville Homes
- Clay soil foundation movement. Colleyville sits on Blackland Prairie clay that shrinks and heaves with North Texas weather. We regularly see cracks in existing slabs that need to be addressed before we tie a new addition into them. On more than one occasion, we’ve coordinated with a foundation specialist mid-project because the original slab had moved more than the homeowner realized.
- Non-standard framing on custom builds. Most Colleyville homes were built by individual builders between 1985 and 2005, which means oddball joist spacing, mixed lumber dimensions, and surprises behind the drywall. A room addition that assumes standard framing gets expensive fast. We open the wall first, then price the work.
- Setback and impervious-cover surprises. Because Colleyville is essentially built out, lots of homeowners hope to add square footage or rebuild on an existing pad and find out the zoning math doesn’t work. We run the site analysis before you pay for architectural drawings, not after.
- Summer heat cracking exterior finishes. Colleyville’s sustained 100-plus degree heat indices accelerate mortar and caulk failure on exterior tie-ins, especially where a new addition meets an old brick veneer. We schedule exterior finish work for early mornings and use heat-rated materials that hold up through July and August.
Pricing for Home Additions & ADU in Colleyville, TX
Here’s the honest range for Colleyville’s market. A ground-level room addition runs $45,000 to $130,000 depending on size, finishes, and whether you need foundation work. A second story addition trends toward the upper end because you’re reinforcing structure below. Garage conversions come in at $30,000 to $80,000. A new detached ADU starts around $90,000 and often exceeds $220,000 for a fully finished unit with a kitchen and separate utilities. Junior ADU conversions are the lightest lift, typically landing in the $45,000 to $130,000 band depending on the plumbing and electrical scope. Every quote we write in Colleyville includes line-item pricing and a written scope. If the scope changes, you get a written change order and a new number before work proceeds. No surprises at the final walkthrough. We offer a Free Second Opinion on Any Written Estimate, and if you’re inside the county, there’s no trip charge. Call (877) 610-1318 to schedule your free estimate.
We Also Serve Cities Near Colleyville
If you’re just outside city limits, we cover Home Additions & ADU in Colleyville and the surrounding area including Bedford, Hurst, Southlake, and Euless. Same crews, same written pricing, same 90-Day Done Right Promise. Tom lives twenty minutes away and wants to know about it if something’s wrong.
Serving Colleyville, TX - Our Local Coverage Area
We’re based in the Colleyville area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Home Additions & ADU in Colleyville
We schedule initial site visits in Colleyville within a few business days, and because we coordinate from our Dallas-Fort Worth office with crews already working across the area, we can usually beat that. Call (877) 610-1318 and we’ll get you on the calendar. There’s no trip charge inside the county, and estimates are free.
Yes, and we’d rather you expect it than be surprised. Permits get pulled and inspections signed on every eligible Colleyville job. The city’s building department enforces strict setback and impervious-cover rules, so we run the pre-permit site analysis before drawings are finalized. Call (877) 610-1318 if you want us to review your lot against current zoning.
A room addition in Colleyville runs $45,000 to $130,000, which reflects the area’s larger custom homes and the foundation work those clay-heavy lots often require. Nearby communities with newer tract housing sometimes price lower, but the scope and the surprises differ. We give you a written line-item quote so you can compare apples to apples. Call (877) 610-1318 for an exact number.
Yes, every job carries our 90-Day Done Right Promise in writing. If something isn’t done right on your Colleyville addition or ADU, one call brings Tom back to make it right. It’s on the contract, not in a brochure. Call (877) 610-1318 and ask us to walk you through it.
Yes, and we’ve done enough of them to know what’s hiding in the walls. Colleyville homes built in the 1980s and 1990s often have mixed framing approaches, so we open the first-floor structure and check the load path before we quote. Second-story additions typically run toward the higher end of the $45,000 to $130,000 range. Call (877) 610-1318 for a free site review.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Colleyville and the surrounding DFW area since 1998.
Ready to talk numbers? Call Barrett & Sons Construction at (877) 610-1318 for a free, written estimate on your Colleyville home addition or ADU. Tom answers the phone, and if he doesn’t, one of his sons will.