Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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AfterHome Additions & ADU in Cibolo: What You’re Really Up Against
Adding a room or building an ADU in Cibolo costs between $45,000 and $130,000 for most home additions, and $90,000 to $220,000 for a new detached ADU. Those numbers reflect something most national contractors won’t tell you: Cibolo sits on Blackland Prairie expansive clay that heaves and shrinks with every wet-dry cycle, so your slab and drainage details matter as much as the square footage. Cibolo has ranked among the fastest-growing cities in the country for over a decade, and that growth shows up in every foundation we pour here. The good news is that when the engineering is done right from day one, an addition or ADU in Cibolo holds up beautifully for decades. And if your project includes a roof tie-in, ask about our Roofing in Cibolo so the whole structure weathers the same. Call (877) 610-1318 and Tom Barrett will walk your lot with you, look at your soils, and give you a written, line-item price before anything gets hammered.
Why Barrett & Sons Construction Is Cibolo’s Preferred Home Additions & ADU Company
Tom Barrett started Barrett & Sons in 1998, and he still answers his own phone. That matters in a city like Cibolo, where most of the homes were built by national tract builders and homeowners rarely have a contractor they actually know by name. Tom lives twenty minutes away, his sons run the crews, and the name on the truck is the name on the contract. When we quote an addition in Cibolo, the price you see is the price you sign, and every change gets issued as a written change order. No surprise invoices, no “we didn’t see that coming” at the end of the job.
Cibolo homeowners regularly ask us to fix work that a cut-rate outfit started and walked away from, usually because the slab wasn’t engineered for the local clay or the drainage wasn’t graded away from the new foundation. We pull permits on every eligible job and we insist on inspections, because the inspector works for you, not for me. That’s why we like him. You can look up our license number yourself, along with Tom’s name and address. We’re the Home Additions & ADU team that treats Cibolo like home, not like a stop on a route.
Our customers in Cibolo tend to be people who’ve already been quoted one number over the phone and handed another at the door by someone they never saw again. They call us because we publish our standing offers: $40 off any repair over $200, a free second opinion on any written estimate, no trip charge inside the county, and a permanent 10% discount for seniors and veterans. Every completed job carries our 90-Day Done Right Promise in writing. If it’s not right, one call brings Tom back.
Our Home Additions & ADU Services in Cibolo
Cibolo’s housing stock is overwhelmingly 2000s-to-present production homes, which means most homeowners here aren’t doing gut renovations on a 1920s Craftsman. They’re adding a bedroom for a growing family, converting a garage into a rentable unit, or building a detached ADU for aging parents. That’s exactly the work we do every week in Cibolo.
ADU Design & Permitting
An ADU in Cibolo starts with the dirt under it. The city’s municipal boundary has expanded so aggressively that we regularly break ground on lots where Cibolo’s water, sewer, and road infrastructure is still being extended. That means coordinating your build timeline with the city’s utility schedule, which is a routine part of our design and permitting process here. We handle the plans, the permits, and the inspections, and we tell you upfront what the city will require before you spend a dollar on lumber.
Garage Conversion ADU
A garage conversion in Cibolo typically runs $30,000 to $80,000 and is one of the fastest ways to add rentable square footage without expanding your footprint. Most Cibolo garages are attached to 2000s-era tract homes with post-tension slabs, so before we touch a wall, we verify the slab condition and check how the existing drainage handles Cibolo’s shrink-swell clay. A poorly graded garage slab will telegraph problems into the new living space within two or three wet seasons.
New Detached ADU
A new detached ADU in Cibolo runs $90,000 to $220,000 depending on size, finish level, and site conditions. On Cibolo’s expansive Vertisol clay, pier placement and moisture-barrier detailing are non-negotiable. We engineer the foundation for soil movement, slope the grade away from the structure, and tie utilities to the city’s current service points. This is where local knowledge saves you money: an ADU built to San Antonio assumptions will move in Cibolo soil, and movement means cracks.
Junior ADU & Interior Conversion
A junior ADU, or JADU, converts interior space like a bonus room, a large den, or part of a master suite into a self-contained living unit. In Cibolo, where floor plans tend toward open concepts with oversized flex rooms, a JADU is often the most cost-effective addition you can make. We run the plumbing, electrical, and a small kitchenette, and we pull the permit so the unit is legal and rentable. Prices usually land between $45,000 and $130,000 depending on scope.
If you’re weighing an addition against moving, we can also help you think through how the same budget could improve what you already have. We handle Kitchen Remodeling in Cibolo and Bathroom Remodeling in Cibolo for homeowners who’d rather upgrade the bones of the house they love than add square footage they don’t need yet.
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 Materials for Cibolo Builds
We don’t install mystery brands off a van. On Cibolo additions and ADUs, we routinely specify Simonton and Ply Gem windows, which stand up to the Texas sun and the occasional hail season without warping. If you’re also looking at Windows & Doors - Cibolo, we handle those with the same brand transparency. Where storm protection matters, PGT impact windows offer real peace of mind for a city that sits close enough to the Gulf to catch serious weather. These are brands you can look up, with warranties we’ll help you register, and we keep local stock access so Cibolo projects don’t stall waiting on a glass shipment from out of state.
Common Home Addition & ADU Problems We See in Cibolo Homes
- Slab movement from expansive clay. Cibolo’s Blackland Prairie soil shrinks hard in summer droughts and heaves when the rains return. Additions tied to an existing slab without proper joint detailing will crack at the transition, and we see it happen within two seasons when the original footer wasn’t engineered for the soil.
- Drainage grading that fights the lot. Much of Cibolo is gently rolling, and the production builders didn’t always regrade for the finished lot. When we add onto a home, we re-check positive drainage away from the new foundation, because standing water next to a slab in Cibolo is a slow-moving foundation problem.
- Utility tie-ins on still-expanding infrastructure. Because Cibolo’s water and sewer lines are still being extended in newer subdivisions, a permit application can trigger a utility capacity review that catches unprepared contractors off guard. We coordinate that early, before your project timeline is set in stone.
- HOA and master-planned-community restrictions. Most Cibolo homes sit in communities with design review boards governing exterior changes, including ADU placement, rooflines, and exterior materials. We’ve worked with the common associations around the 78108 area and know how to prepare submittals that won’t bounce back twice.
Pricing for Home Additions & ADU in Cibolo, TX
A home addition in Cibolo runs $45,000 to $130,000. A garage conversion lands between $30,000 and $80,000, while a new detached ADU runs $90,000 to $220,000. Where your job falls depends on square footage, finish level, and what the soils and utility work require. A second-story addition trends toward the top of the range because of structural reinforcement and stair work. A sunroom or enclosed patio is typically the most affordable way to add conditioned living space. We put every allowance, every scope item, and every price change in writing before work starts, so the number you sign is the number you pay. Call (877) 610-1318 for a free, written estimate on your Cibolo project.
We Also Serve Cities Near Cibolo
Our crews work throughout the Cibolo area, including Schertz, Selma, Universal City, and Converse. If you’re just over the city line, the same Cibolo pricing and written-change-order standards apply. We coordinate scheduling from our San Antonio office, but the crew that builds your addition lives and works close enough to shake your hand at the hardware store.
Serving Cibolo, TX - Our Local Coverage Area
We’re based in the Cibolo 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 Cibolo
We typically have a Cibolo project estimator on site within a few business days of your call. Because we run our own crews and schedule from our San Antonio office, we aren’t routing through an out-of-state call center or a dispatch board. Call (877) 610-1318 and a live person will pick up, 24/7.
Yes, we serve the entire 78108 area, including newer master-planned communities along FM 1103 and the subdivisions pushing toward the eastern edge of the city boundary. If your lot is in a still-developing section where utilities are being extended, we’ll coordinate that with the city as part of your permit package.
We do not frame emergency work like a “same-day rescue” pitch, because foundation and structural problems need diagnosis, not speed. What we will do is respond promptly, assess the issue honestly, and give you a written plan and price before we touch anything. If a slab crack or drainage failure is urgent, call (877) 610-1318 and we’ll get someone out to look.
Cibolo pricing tends to run slightly higher than Schertz or Universal City on foundation-intensive work, because the expansive clay in Cibolo’s Blackland Prairie soils often requires deeper pier placement, stronger slab reinforcement, and more careful drainage grading. That’s honest money, not markup. A properly engineered foundation in Cibolo is cheaper than fixing a cracked one later.
Every Barrett & Sons job carries our 90-Day Done Right Promise in writing. If something isn’t done right, one call brings Tom Barrett back. That’s the same promise we give in every city we serve, and it’s why our Cibolo customers see us again at the hardware store without crossing the street.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Cibolo and the surrounding Texas communities since 1998.
Ready to talk about your Cibolo addition or ADU? Call (877) 610-1318 for a free, written estimate. Permit pulled, price in writing, and a name you can look up.