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 Kyle
A full home addition or detached ADU in Kyle runs $45,000-$130,000, and garage conversions land between $30,000 and $80,000 depending on scope and finish level. We’re Barrett & Sons Construction, owner-operated since 1998, and we work in Kyle nearly every week, mostly in Plum Creek, 6 Creeks, and the new subdivisions filling in east of I-35. Tom Barrett and his sons run the crews themselves, not a dispatcher in another state. Call (877) 610-1318 and you’ll get a live person, not a voicemail box.
Most of Kyle’s homes went up after 2015 by production builders like DR Horton, Lennar, and KB Home. That matters more than people think. Our crews already know those floor plans, slab layouts, and the HOA rulebooks in the neighborhoods where you live, which saves weeks on planning and keeps your builder’s warranty intact.
Why Barrett & Sons Construction Is Kyle’s Preferred Home Additions & ADU Company
We’ve been Home Additions & ADU in Kyle long enough to know the difference between what a 2018 Lennar home and a 2016 DR Horton home can handle structurally. That’s not trivia. It’s what tells us whether your garage wall is load-bearing before we touch a saw, and whether your 200-amp panel will actually carry a new ADU with a mini-split and an EV charger.
Kyle homeowners tell us the same story again and again. They got burned by an out-of-town crew that quoted one number, showed up with another, and then vanished when the city inspector flagged the rough-in. We put every scope and every allowance in writing before work begins. If the price changes, you get a written change order first. Not after. Every eligible Kyle job includes permits pulled and inspections signed, because the inspector works for you, not for us.
Tom Barrett publishes his name, his license number, and his address. Look it up before you sign anything. The crew members on your property are background-checked, uniformed, and answer to Tom directly. We’re not the cheapest bid in Kyle. We’re the bid that holds.
Our Home Additions & ADU Services in Kyle
ADU Design & Permitting
The hardest part of an ADU in Kyle isn’t the framing. It’s the Hays County permitting backlog and the HOA architectural committee. Our Home Additions & ADU team handles both before a nail moves. We submit full sets to the City of Kyle, batch inspection requests with other pending permits where we can, and walk each plan through your HOA’s design review ahead of time. In 6 Creeks and Plum Creek, that pre-approval step is mandatory. Skipping it is how people lose $2,000 in plan revisions.
Garage Conversion ADU
A garage conversion in Kyle typically costs $30,000-$80,000. The spread comes down to whether you’re doing a clean guest suite with a powder bath or a full kitchen and separate HVAC zone. One Kyle-specific warning: most post-2015 production homes are slab-on-grade with post-tension foundations. Cutting into that slab for plumbing without a stamped structural plan can hit a tension cable and void your builder’s 10-year foundation warranty. We pull the structural plan every time, no shortcuts.
New Detached ADU
New detached ADUs in Kyle run $90,000-$220,000. That’s a serious investment, and it should be treated like one. We’ll size the electrical service properly from day one. Relying on the original builder’s 200-amp panel for an ADU with a mini-split and EV charger is a classic mistake, one that pops a $4,000-$7,000 change order after rough-in. We put that load calculation in the written scope up front. No surprises.
Junior ADU & Interior Conversion
A junior ADU uses interior square footage you already have, a spare bedroom or a bonus room, and converts it with a kitchenette and private entry. No new foundation, which keeps the cost well below a detached build and usually preserves your main house warranty. We’ll confirm what your HOA in Kyle allows for secondary units and whether the city classifies your scope as a remodel or an ADU. The classification changes the permit path. We handle it either way.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
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 Kyle
The materials we install are brands you can look up. In Kyle ADU work, we regularly spec Schluter systems for waterproofing bath and shower areas, Grohe fixtures for ADU kitchens and baths where owners want sturdy German hardware that holds up to hard Texas water, and GAF roofing products when an addition ties into the existing roofline. We don’t put mystery brands off a van into your home. We also keep a stock of common repair parts locally, which means less waiting when a supplier delay hits.
Common Home Additions & ADU Problems We See in Kyle Homes
- Expansive clay soil moving the foundation. Kyle sits at the transition between the Edwards Plateau and the Blackland Prairie, and the clay here swells and shrinks with every dry spell and downpour. A sunroom or addition that looked plumb in March can have sheetrock cracks by August if the contractor didn’t account for it in the foundation design.
- HOA architectural denials. 6 Creeks and Plum Creek enforce roof pitch and secondary structure height rules that out-of-town contractors don’t know until the permit is denied. We check HOA rules before plans are drawn, not after.
- Undersized electrical panels. A new detached ADU with mini-split and EV charger on a 200-amp production-builder panel trips breakers and triggers a service upgrade mid-project. We size the load in the initial scope.
- Builder warranty voids. Cut into a post-tension slab to run plumbing for a garage conversion without a stamped plan, and your builder’s foundation warranty is gone. We get the stamped plan. Every time.
Pricing for Home Additions & ADU in Kyle, TX
| Project Type | Typical Kyle Price Range |
|---|---|
| Garage Conversion ADU | $30,000-$80,000 |
| Sunroom & Enclosed Patio | $45,000-$130,000 |
| ADU Construction (Detached) | $90,000-$220,000 |
What moves the number: square footage, kitchen or bath count, foundation type, electrical service upgrades, and HOA-mandated finish standards. We give written line-item quotes, not ballpark figures. Call (877) 610-1318 for a free estimate on your Kyle project.
We Also Serve Cities Near Kyle
Our crews serve Kyle and the surrounding communities along the I-35 corridor. If you’re in Buda, Shady Hollow, Austin, or Hornsby Bend, the same permits-pulled, HOA-checked, written-change-order process applies. We coordinate scheduling from our Austin office and run crews into Kyle weekly.
Serving Kyle, TX - Our Local Coverage Area
We’re based in the Kyle area and offer Bathroom Remodeling - Kyle residents trust, plus we 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 Kyle
Will adding a detached ADU in Plum Creek void my builder’s structural warranty on the main house?
No, a properly permitted detached ADU in Plum Creek should not void your main house structural warranty, but cutting into the slab or tying into the existing foundation without a stamped structural plan absolutely can. The production builders in Kyle write their 10-year structural warranties around specific construction methods. If a contractor alters the post-tension slab or load path without an engineer’s sign-off, the builder walks away from the warranty. We pull structural plans and permits on every ADU. Call (877) 610-1318 and we’ll review your specific builder’s warranty language.
How long does Kyle’s permit office really take for a garage conversion these days, and can we speed it up?
Right now, a garage conversion permit in Kyle can take anywhere from three to eight weeks, and inspection backlogs have pushed some rough-in checks out multiple weeks during peak building season. Yes, it can be sped up. Contractors who batch inspection requests with other permits already in the city’s queue, and who have working relationships with Kyle inspectors, turn projects measurably faster than out-of-area crews treating Kyle like a small-town permit office. We’ve been through it enough times to plan around it. We’ll give you a realistic schedule before we start, not a hopeful one.
Do 6 Creeks or Plum Creek HOAs really require pre-approval for a sunroom or enclosed patio addition?
Yes. Both 6 Creeks and Plum Creek enforce architectural committee review on sunrooms, enclosed patios, and secondary structures. Some sections carry outright bans on detached structures over a certain height or square footage. Others cap floor area as a percentage of the main home. We submit your plans to the HOA before we finalize permits, because a denied architectural review at the back end is a $2,000 plan revision nobody wants. If you’re not sure what your section allows, call (877) 610-1318 and we’ll help you figure it out.
Can I convert part of my garage into a junior ADU without pouring a new foundation?
Yes, you can convert interior square footage or a portion of your garage into a junior ADU without new foundation work. That’s usually the fastest path. But if you’re in a post-2015 Kyle production home, the garage slab is post-tension. Running plumbing through it for a bathroom still requires a stamped structural plan, even without new foundation pours. Skip that step and you risk hitting a tension cable. We handle the stamped plan as part of the permit package.
What should I update first in a DR Horton or Lennar home in Kyle, and what is fine to leave alone?
The first things worth replacing in most Kyle production homes are the build-grade carpet, the hollow-core interior doors, and the plastic shower surrounds. Door and window misalignment from clay soil movement is also common, even in homes only a few years old, and it’s worth fixing before it damages the frames. What’s usually fine to leave alone in year one: the roof decking, the framing, and the foundation, provided nobody’s cut into them. The builder’s 10-year structural warranty covers those. Don’t touch them without a pro. For a straight answer on your specific home, call (877) 610-1318.
Talk to a Real Person in Kyle
Last fall our crew added a 320-square-foot sunroom off a 2019 KB Home primary suite in 6 Creeks. The original subfloor had deflected enough that the sliding door wouldn’t latch in August, so we sistered the joists, matched the builder’s 2×6 wall framing, and flashed the roofline with the same shingle profile the original roof carried. Because we pulled a permit and coordinated our rough-in inspection with two other permits the city was batching, we closed the job in five weeks instead of eight, and the homeowners didn’t have to touch their builder’s 10-year structural warranty.
That’s how we work in Kyle. Written scope before we start. Permits pulled. HOA rules checked. Change orders in writing if anything shifts. And a 90-Day Done Right Promise on every completed job. If it’s not done right, Tom Barrett comes back and makes it right, one call.
Call (877) 610-1318 today for your free estimate. Mention the Senior & Veteran discount if it applies to you, and ask us about the free second opinion on any written estimate you’ve already received.
Written by Tom Barrett, Owner at Barrett & Sons Construction.