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 Flower Mound
Adding square footage in Flower Mound means navigating layers most contractors never see coming: HOAs in Bridlewood and Wellington that review every elevation, Corps of Engineers flowage easements along Grapevine Lake, and black clay soil that punishes slab work done without local soil knowledge. No matter if you’re planning a detached ADU off FM 2499 or a second-story addition in The Highlands, the planning phase alone can stall for months in the wrong hands. You need a team that has pulled these permits before. Call us at (877) 610-1318 to talk through your lot, your HOA, and your addition before you spend a dollar on plans.
Why Barrett & Sons Construction Is Flower Mound’s Preferred Home Additions & ADU Company
We’re not a franchise dispatching rotating crews. Tom Barrett and his sons run our Home Additions & ADU jobs personally, and they have been doing it since 1998. Flower Mound homeowners keep our number because every price change arrives as a written change order before work moves forward. Every permit gets pulled. Every inspection gets signed. And every finished job carries our 90-Day Done Right Promise in writing.
Our Flower Mound customers have watched us coordinate COE reviews on lake-adjacent lots in Twin Coves, work through design-review with HOAs that reject the first elevation submittal, and still deliver on time. There’s a reason we get called back for the next project and for Kitchen Remodeling in Flower Mound once the addition is done. When you work in a town where the permit inspector knows your name, you do the job right the first time.
Our Home Additions & ADU Services in Flower Mound
ADU Design & Permitting
Flower Mound lots in 75022 and 75028 often sit inside Corps of Engineers flowage easement zones, and some HOAs treat an ADU as a separate structure requiring full design-review submittal before the city will even look at it. We handle the COE coordination, the HOA package, and the city permit set as one process. You get one point of contact for the entire pre-construction phase.
Garage Conversion ADU
Converting an attached garage on a 1990s tract home off Morriss Road is usually the fastest path to a rental unit or an accessible in-law suite. We check slab elevation against the COE 532-foot line early, because garage slabs poured near Grapevine Lake sometimes sit lower than you’d think. Expect a garage conversion ADU in Flower Mound to run $30,000 to $80,000 depending on plumbing runs, insulation upgrades, and whether you’re adding a separate entrance.
New Detached ADU
A detached ADU gives you a fully independent rental or a quiet space for aging parents without sharing walls. In Flower Mound, the foundation work matters more than it does in most Texas towns; our crews have spent decades cutting footings into Blackland Prairie clay that swells every spring and cracks every August. We spec post-tension slabs and drainage grading from day one so the structure stays put. A new detached ADU in Flower Mound typically runs $90,000 to $220,000.
Junior ADU & Interior Conversion
If you’re converting a bonus room, a walkout basement, or a portion of the first floor into a junior ADU, the work is lighter on foundation and heavier on egress, fire separation, and plumbing. These conversions work well in the large brick-facade homes built during Flower Mound’s 1990s and 2000s expansion, where floor plans have dead square footage ready to be repurposed. We also handle Bathroom Remodeling in Flower Mound for the ADU’s new bath, which keeps the whole project under one roof.
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 Flower Mound
We install brands with warranties you can actually call. Flower Mound Roofing packages on additions and ADUs include GAF materials, because DFW hail alley storms come hard and often. In bathrooms and wet areas we spec Schluter waterproofing systems and Grohe fixtures. Our crews are background-checked and uniformed on every visit, and our Flower Mound customers get the same premium brands we’d put in Tom Barrett’s own home.
Common Home Additions & ADU Problems We See in Flower Mound Homes
- Expansive clay movement under new slabs: Flower Mound sits on Blackland Prairie soil that swells in wet springs and shrinks in summer droughts. We see cracks in new additions within five years when a contractor pours standard slabs without soil testing and post-tension reinforcement.
- COE flowage easement surprises: Homeowners near Heron’s Run or Twin Coves pull a standard city permit, break ground, and then discover their rear yard sits inside the Corps of Engineers 532-foot elevation line. This halts the project until a Section 404/floodplain compliance review clears, which can add weeks.
- HOA design-review rejections: Wellington, Bridlewood, and The Highlands all run their own architectural committees. A roofline or facade shift that the city approves can still get rejected at HOA review, and the resubmittal clock starts over. We’ve managed enough of these to know what gets approved on the first pass.
- Foundation racking in 1990s and 2000s tract homes: The brick-veneer homes that define Flower Mound’s master-planned neighborhoods are now 15 to 30 years old. Door frames rack, brick veneer cracks, and new additions need structural framing corrections before the new work ties in cleanly.
Pricing for Home Additions & ADU in Flower Mound, TX
A room addition in Flower Mound generally runs $45,000 to $130,000. A detached ADU lands between $90,000 and $220,000. Garage conversions run $30,000 to $80,000. What moves the number: whether your lot triggers COE review along Grapevine Lake, whether your HOA requires elevation changes, soil conditions on your specific street, and how much plumbing and electrical the new space needs. We write every allowance and every price change down before the first nail moves. Call (877) 610-1318 for a free estimate on your specific lot, because what a HOA in Bridlewood requires can differ from what a lot in 75027 needs.
We Also Serve Cities Near Flower Mound
Our crews work throughout Denton County and the surrounding area, including Highland Village, Lantana, Corinth, and Lake Dallas. If your project sits near the Grapevine Lake shoreline or inside one of the master-planned neighborhoods around Flower Mound, we already know the permitting path. You can learn more about our work in Flower Mound here.
Serving Flower Mound, TX - Our Local Coverage Area
We’re based in the Flower Mound 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 Flower Mound
Yes. Our crews serve Flower Mound directly from the Dallas-Fort Worth metro office, and scheduling a free estimate is usually a matter of days, not weeks. Call (877) 610-1318 and a live person answers, 24/7.
Yes, we work across all of Flower Mound, including 75022, 75027, and 75028. Each of these neighborhoods has its own HOA design-review process, and we handle that paperwork as part of the pre-construction phase.
Detached ADUs in Flower Mound run $90,000 to $220,000, which is comparable to Highland Village and Corinth but sometimes slightly higher than Lake Dallas or Lantana because of HOA design-review fees and COE coordination when a lot sits near Grapevine Lake. We give written line-item quotes so you see every cost before signing.
The price does not change unless you change the scope, and if you do, you’ll get a written change order before the work proceeds. No surprise invoices at the end. That policy is on every contract we write in Flower Mound.
Yes. Every job carries our 90-Day Done Right Promise in writing. If something isn’t right, call Tom Barrett and he comes back and makes it right. One call.
Planning an addition or ADU in Flower Mound means juggling HOA reviews, COE easements, and expansive clay all at once. We’ve done it for decades. Call (877) 610-1318 to schedule your free estimate.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Flower Mound since 1998.