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 Highland Village
A full home addition or ADU in Highland Village typically runs $45,000-$130,000, and most projects take 3-6 months from permit to punch list. The fastest way to get an exact number for your house is a walkthrough with someone who knows what’s behind these 1980s and 1990s walls before quoting. Call Barrett & Sons Construction at (877) 610-1318 for a free estimate. We’re in Highland Village regularly, and we’ll quote the job honestly the first time. The city sits tucked along the southern shore of Lake Lewisville, which means some lots face federal permitting rules that inland neighbors never deal with; we know which ones fire and when.
Why Barrett & Sons Construction Is Highland Village’s Preferred Home Additions & ADU Company
We have worked on homes throughout Highland Village long enough to know where the difficult lots are. Lakeside Highland Shores, The Highlands, Chapel Hill, and Castlewood all sit close enough to Lake Lewisville that the Corps of Engineers flowage easement can touch them. That means a room addition that looks simple on paper sometimes needs Section 404 clearance, a FEMA floodplain review, and Denton County approval before anyone pulls a permit. Barrett & Sons handles that stack of paperwork up front, so you don’t discover it mid-framing.
Tom Barrett runs the company himself, and his sons lead the crews. When a Home Additions & ADU project needs a decision, the person making it lives twenty minutes away and answers his own phone. That matters when an unexpected framing issue shows up at noon on a Tuesday. Our Highland Village customers know we respond quickly, write every allowance on paper before work begins, and stand behind the job with a written 90-Day Done Right Promise. A live person answers our phone 24/7, not a voicemail box.
Our Home Additions & ADU Services in Highland Village
Room Additions
Most Highland Village homes were built between the 1980s and early 2000s, which puts many of them at the stage where families have outgrown the original footprint. A ground-floor room addition here means tying into slab-on-grade construction that sits on North Texas’s expansive black clay. We engineer the footing for that movement, because an addition dropped onto the existing slab without an isolation joint can crack within two seasons. Permits get pulled on every eligible job, and the inspector signs before we call it done.
Second Story Additions
Building up in Highland Village usually costs more per square foot than building out, but it preserves yard space on lots that sit tight against Lake Lewisville’s shoreline or HOA-managed streetscapes. The older brick-veneer homes here hide surprises behind the drywall, including undersized headers and wiring that no longer meets code. We inspect before we quote, price any required upgrade as a written allowance, and nothing gets touched until you’ve approved it in writing.
ADU Design & Permitting
Accessory dwelling units in Highland Village run $90,000-$220,000 depending on size and site conditions. What makes Highland Village different from Flower Mound or Corinth is the federal overlay: lots inside the Corps of Engineers flowage easement trigger Section 404 clearance if the ADU changes grade or disturbs soil. We identify that boundary before designing anything, because a Section 404 review can halt a permitted project midway. The permit inspector works for you, not for us, and we like it that way.
Garage Conversion ADU
Converting an attached garage runs $30,000-$80,000 in Highland Village and is often the fastest path to rental income or a mother-in-law suite. These conversions touch the same slab-on-grade foundations, which means drainage and moisture control matter more than most homeowners expect. Highland Village’s wet winters and 100°F summers test every exterior seal. We address flashing, vapor barriers, and HVAC load calculations before drywall goes up, not after.
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 Highland Village
When a room addition or ADU needs new windows, we lean on Simonton, Ply Gem, and PGT products for Highland Village work. These are materials you can look up, not mystery brands off the back of a van. Simonton’s vinyl lines hold up well in the North Texas heat, and PGT’s impact-rated windows make sense for lakefront homes that take storm-driven rain off Lake Lewisville. If a brand has a known failure mode in this climate, we know it and we steer around it. Our relationship with local suppliers means faster turnaround when a permit inspection requires a specific product spec.
Common Home Additions & ADU Problems We See in Highland Village Homes
- Undersized framing behind 1980s and 1990s walls. The original construction met code at the time, but once we open a bearing wall for a second-story addition, we sometimes find headers a previous owner notched for plumbing or wiring. That hidden damage changes the structural capacity, and the fix belongs in a written change order before work resumes.
- Outdated wiring that a permit triggers. Highland Village homes in the 25-40-year age range often have wiring that passed inspection in 1990 but no longer meets current code. When a permit opens that wall, the city inspector will flag it; we price the electrical rough-in as a written allowance, so the upgrade isn’t a surprise at close-out.
- Corps of Engineers flowage easement surprises. Lakefront and near-lake lots in Highland Village can sit partially inside the federal flowage easement. Adding square footage or regrading triggers a Section 404 review that inland neighbors in Flower Mound never face. We identify the easement boundary before you spend a dollar on design.
- Slab movement from black clay soil. Highland Village sits on Vertisol clay that expands in wet winters and shrinks in drought summers. A new addition tied directly to the existing slab without an engineered joint or pier system can crack within two seasons. We engineer for that movement from day one.
Pricing for Home Additions & ADU in Highland Village, TX
Below are real line-item ranges for Highland Village’s market, not guesses from a national database.
| Project | Typical Range |
|---|---|
| Home Addition | $45,000-$130,000 |
| ADU Construction | $90,000-$220,000 |
| Garage Conversion ADU | $30,000-$80,000 |
What moves the number in Highland Village? Lot slope, easement review, foundation condition, and the age of the electrical panel all play in. The honest answer is that any contractor who quotes a firm price over the phone hasn’t seen your walls. We inspect first, write allowances into the contract, and issue a written change order before any scope change touches the job. Call (877) 610-1318 for a free estimate. Let us put the scope in writing, not in a voicemail.
We Also Serve Cities Near Highland Village
Our crews take on home additions and ADU work in Highland Village and the surrounding communities: Flower Mound, Lewisville, Lake Dallas, and Corinth. If your lot backs up to the lake or sits inside a flowage easement, we’ve already dealt with the federal review process and know what it adds to the timeline. A live person answers the phone when you call for the free estimate.
Serving Highland Village, TX - Our Local Coverage Area
We’re based in the Highland Village 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 Highland Village
Only lots inside the U.S. Army Corps of Engineers’ flowage easement around Lake Lewisville trigger Section 404 review. That includes a meaningful share of Highland Village, not just lakefront lots. We confirm the boundary before design starts, so you never pour money into plans that a federal review will stall.
Electrical work is the most common, followed by insulation and smoke-detector interconnection. Once a permit opens a wall, the city inspector will hold the whole job to current code. Older homes in the 75077 zip code often need panel upgrades and AFCI/GFCI protection added. We build those into the allowance so the cost is on paper before the wall comes down.
We isolate the new footing from the existing slab with an engineered joint or pier system that lets each structure move independently. Expansive clay moves in Highland Village between winter and summer, and any addition tied rigidly to the existing slab can crack within two seasons. The geotechnical report determines the exact design.
We stop work, photograph the issue, and price the repair as a written change order with a fixed allowance. You approve it in writing before we touch another board. That’s the difference between a contractor who surprises you at the end and one who puts the change order in front of you before the work happens. On a 1990s brick-veneer home in Lakeside Highland Shores, our crew opened a wall for a second-story addition and found original wiring that no longer met code and a load-bearing header that a previous owner had notched. We stopped, priced the repair as a written change order, and finished the upgrade before the city inspection sign-off.
Yes. Highland Village is a heavily HOA-governed city, especially in the planned subdivisions built from the 1980s through the early 2000s. HOA architectural review often runs 30-60 days before Denton County even sees the permit application. We sequence the submittals so the HOA process and the county review overlap where possible. Call (877) 610-1318 for an exact timeline on your street.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Highland Village for over 29 years.