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 Little Elm
Little Elm Roofing, home additions, and ADU construction in Little Elm typically run between $45,000 and $130,000, depending on whether you’re adding a single room or building a full detached accessory dwelling unit. We know this town’s soil, its building patterns, and its permit office well enough to give you a straight number before we ever lift a hammer. If you’re weighing a garage conversion in Paloma Creek or a second-story addition near the lake, call (877) 610-1318 and we’ll walk the property with you.
Little Elm isn’t like the older DFW suburbs. Most of the homes here went up fast, between 2005 and 2022, and that changes how an addition should be planned. We have been building and remodeling in this market long enough to know what’s behind the drywall before we open it up, and that saves you money on surprises.
Why Barrett & Sons Construction Is Little Elm’s Preferred Home Additions & ADU Company
Tom Barrett founded this company in 1998, and his name is on every job we take in Little Elm. That is not a slogan. His sons run the crews, and Tom or one of his sons is on-site most days. When a Little Elm homeowner calls with a question about a change order or a framing detail, the person who picks up the phone knows the job because they were standing on it yesterday.
We put every price change in writing before it touches your job. That matters here, because Little Elm’s fast-built housing stock throws curveballs. Builder-grade framing that looked fine in 2012 can hide drainage shortcuts, and when we open a wall and find something the original builder rushed, you get a written change order with a number you can approve or reject. No end-of-job surprise invoice. We pull permits and get inspections signed on every eligible addition or ADU, because the inspector works for you, not for us, and we want him looking at our work.
Ask anyone on your street, or look up Tom Barrett’s name, address, and license number yourself. We have been serving local communities for over 29 years, and calls are answered by a live person 24/7, not a voicemail box in another state.
Our Home Additions & ADU Services in Little Elm
ADU Design & Permitting
Little Elm’s zoning and platting rules for accessory dwelling units are specific, and they have changed as the city has grown past 50,000 residents. We handle design and permitting together, because a well-designed ADU that fails a drainage or setback review helps nobody. We know the 75068 permitting path and we sit through the plan review with your project, not bounce between a designer and an expediter and the city.
Garage Conversion ADU
A garage conversion in Little Elm typically runs $30,000 to $80,000, and it is usually the fastest path to rental income or an in-law suite. Many of the garage slabs here were poured as part of compressed production timelines, so we check the pad elevation and drainage before we frame a single wall. This is where our Home Additions & ADU team spends a lot of time, because an existing garage footprint usually has the cheapest square footage you can convert.
New Detached ADU
Building a detached ADU from scratch in Little Elm runs $90,000 to $220,000. That is a real range, and it reflects whether you’re building a 400-square-foot studio or a two-bedroom unit with a kitchen and laundry. The black clay soil along the Lewisville Lake peninsula means every detached structure needs a properly engineered foundation and, on many lots, regraded drainage before the slab goes in. We have done enough of these in Little Elm to know which lots need the extra site work before we quote the framing.
Junior ADU & Interior Conversion
A junior ADU, often called a JADU, converts interior space that already exists: a finished basement flex room, an oversized utility room, or a loft over the garage. In Little Elm, where basements are rare and lofts are common in the two-story production plans, this route can run from $45,000 up and avoids the foundation questions entirely. We have turned more than a few unused game rooms in the master-planned communities into self-contained suites with their own entrance.
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 Little Elm
When we frame, finish, and waterproof your addition or ADU, we use materials you can look up. Schluter waterproofing in wet areas, Sterling and Grohe fixtures when you want a name that has been on the shelf for decades, and GAF roofing on any new roof lines we add. We do not stock mystery brands off a van. If you want the same brands in an existing space, we also handle Kitchen Remodeling in Little Elm and Bathroom Remodeling in Little Elm, so the new wing and the old house can match.
Common Home Additions & ADU Problems We See in Little Elm Homes
- Undersized lot grading and drainage easements. Many post-2010 subdivisions along the lake were graded minimally, so a simple room addition often requires re-engineering the site drainage before framing can begin. We flag this in the estimate, not after the trench is open.
- Builder-grade framing cycling into its first major repair. Homes built between 2005 and 2015 are now 10 to 20 years old, and we regularly find undersized headers, missing blocking, and rushed connections when we tie a new addition into the existing structure.
- Expansive clay soil stress on slabs. The black gumbo clay under Little Elm swells in wet winters and shrinks in summer droughts, which means any new foundation or attached addition needs a soil report and the right pier or beam strategy from day one.
- High water table near the lake. Lower-lying lots close to Lewisville Lake can have groundwater only a few feet down, which changes excavation, waterproofing, and even where your new ADU should sit on the lot.
Pricing for Home Additions & ADU in Little Elm, TX
A typical home addition in Little Elm runs $45,000 to $130,000, while a detached ADU runs $90,000 to $220,000 and a garage conversion runs $30,000 to $80,000. What moves the number is site conditions, not markup. A slab on stable, well-graded ground costs less than a slab on black clay with a high water table and a drainage easement that needs re-engineering. We give you a written, line-item quote before work starts, and if the scope changes, you get a written change order with a dollar figure you approve first. Call (877) 610-1318 for a free estimate, and ask us about the free second opinion on any written estimate you already have from another contractor.
Little Elm Home Addition & ADU Pricing at a Glance
- Room Addition: $45,000 - $130,000
- Garage Conversion ADU: $30,000 - $80,000
- New Detached ADU: $90,000 - $220,000
- Junior ADU / Interior Conversion: $45,000 - $130,000
- Sunroom or Enclosed Patio: $20,000 - $60,000 (site-dependent)
We Also Serve Cities Near Little Elm
Our crews work throughout the Lewisville Lake corridor and the surrounding North Texas towns. That includes Lake Dallas, Corinth, The Colony, and Frisco, along with every neighborhood inside the 75068 zip code in Little Elm itself. If you’re just outside the city line, give us a call and we will tell you straight whether it is a route we run.
Serving Little Elm, TX - Our Local Coverage Area
We’re based in the Little Elm 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 Little Elm
A garage conversion ADU in Little Elm usually takes 3 to 5 months from permit to final inspection, while a new detached ADU can take 6 to 10 months depending on site work and weather. The permit review timeline at the city can add 2 to 6 weeks, and we build that into the schedule instead of pretending it won’t happen. Call (877) 610-1318 and we will give you a realistic week-by-week plan for your specific lot.
Yes. We pull permits and get inspections signed on every eligible addition or ADU in Little Elm, no exceptions. The inspector works for you, not for us, and a permitted job protects your resale value and your insurance. If a contractor tells you permits are optional in Little Elm, get a second opinion.
A garage conversion in Little Elm typically runs $30,000 to $80,000, which is generally in line with Frisco, but Little Elm lots near the lake often carry extra drainage and soil-prep costs that can add $3,000 to $8,000. Those are real numbers we can quantify after a site walk. Call (877) 610-1318 for a free estimate and we will break down exactly where your money goes.
We work across the entire 75068 zip code, including Paloma Creek, the lakefront communities along Lewisville Lake, and the older sections near downtown Little Elm. We know the master-planned subdivisions and the streets where the drainage easements run tight, because we have been on them.
Every addition and ADU we build in Little Elm carries our written 90-Day Done Right Promise. If it is not done right, Tom Barrett comes back and makes it right, one call. That promise is written on your contract, not buried in fine print, and it applies to workmanship on the jobs we complete here.
Get Your Free Home Addition or ADU Estimate in Little Elm
If you are thinking about adding a room, converting a garage, or building a detached ADU in Little Elm, the next step is a free site walk and a written estimate. We also install Windows & Doors in Little Elm. We serve Little Elm from our Dallas-Fort Worth office, and scheduling is coordinated locally, so you get a real person on the phone and a real crew in your yard. Call (877) 610-1318 today and ask for the free second opinion on any written estimate you already have. We will tell you what the other contractor missed, what the city will require, and what it should actually cost.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Little Elm, TX.