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 Cleburne
A home addition or detached ADU in Cleburne typically runs $45,000 to $130,000 for a room addition, $90,000 to $220,000 for a full ADU, and $30,000 to $80,000 for a garage conversion. Those are real numbers for this market, not national averages pulled off a chart. If you’re planning to build on acreage or expand a home inside Cleburne’s older neighborhoods, this page tells you exactly what changes the price and how we scope it before you ever sign anything. Call (877) 610-1318 and we’ll walk the lot with you.
We’re Barrett & Sons Construction, and our Home Additions & ADU crews work in Cleburne every week. Tom Barrett founded this company in 1998 and his sons run the crews. When we build here, we build for the clay soil, the seismic history, and the Johnson County permit process that contractors from Fort Worth don’t always see coming.
Why Barrett & Sons Construction Is Cleburne’s Preferred Home Additions & ADU Company
Cleburne sits at the intersection of Johnson County’s expansive black-clay soils and the documented induced seismic activity from nearby Barnett Shale wastewater injection that made national news in 2008 and 2009. That’s not trivia. It changes how we design slabs, set piers, and read cracks in existing homes. A contractor who builds one addition in Burleson and one in Cleburne the same way will hand you problems in three years. We don’t.
Our reputation in Cleburne is built on line-item quotes, written change orders, and permits pulled on every eligible job. The permit inspector works for you, not for me, which is exactly why we like him. We serve homeowners from the historic courthouse square neighborhoods out to the acreage around County Road 806 and the 76031 and 76033 zip codes. If you want to verify anything about us before you call, look up the license number. Tom publishes his name, his address, and his license number. That’s the point.
When you call (877) 610-1318, a live person answers. Not a voicemail box, not an out-of-state call center. You’ll talk to someone who knows what a Johnson County septic setback review means because we file them regularly.
Our Home Additions & ADU Services in Cleburne
New Detached ADU
A detached ADU on Cleburne acreage usually means county permitting, septic and well setbacks, and a longer power run than anyone expects. We scoped a 900-square-foot detached ADU off County Road 806 for a homeowner whose existing 1960s ranch had diagonal cracks from the 2008 swarms. Our crew drilled piers 12 feet deep to bypass the active clay layer, set the slab with a moisture barrier and post-tension cables, and ran a 240-foot electrical rough-in from a new pole because the septic setback pushed the structure to the back of the 5-acre lot. We used Kohler fixtures and KraftMaid cabinets, and at final inspection sign-off the owner had a rental unit that didn’t move even after a 3.2-magnitude tremor.
ADU Site Prep & Utilities
Site prep in Cleburne is not a line item to gloss over. The alternating drought-and-deluge cycle of North Central Texas causes the expansive clay to shrink dramatically in summer and heave significantly after heavy rain. That means grading, drainage, moisture barriers, and deep-pier or post-tension slab design are non-negotiable before we pour anything. We also handle septic and well setback coordination with Johnson County so your ADU pad doesn’t end up two inches below the surrounding pasture with spring storm water running into the finished floor.
ADU Design & Permitting
We design ADUs to Cleburne’s actual conditions, not a stock plan from a catalog. That means accounting for pier depth, post-tension slabs on expansive clay, and roof framing that holds up in Tornado Alley wind loads. Permits get pulled through the correct channel, city or county, and inspections get signed. If a health department affidavit is required before septic review, we file it first, not after the slab is scheduled.
Garage Conversion ADU
Converting a garage in Cleburne’s older homes often triggers foundation questions. Mid-century brick ranch houses and late-1800s Victorian homes around the courthouse square frequently need pier work or structural reframing before a conversion is safe. A garage conversion ADU in Cleburne typically runs $30,000 to $80,000, and the difference usually comes down to what the foundation tells us when we open it up. We put that in writing before work starts.
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 Cleburne
We install materials you can look up, not mystery brands off a van. On Cleburne projects we regularly specify Schluter for waterproofing, Grohe for fixtures, and GAF for any roofing tied into the addition. We keep supplier relationships local where possible, which means faster turnaround on parts and fewer delays when the Cleburne heat pushes a schedule. If you have a brand preference, say so at the estimate. We’ll put it in the line item.
Common Home Additions & ADU Problems We See in Cleburne Homes
- Slab heave from untreated expansive clay. Cleburne’s Blackland Prairie soils shrink in summer drought and heave after heavy rain. A slab poured without deep piers or post-tensioning will crack at the roofline within a few drought-deluge cycles.
- Diagonal drywall cracks from the 2008-2009 seismic swarms. Local contractors learned to treat fresh diagonal cracks as more than ordinary settling. Those 2.5 to 3.3 magnitude events left a diagnostic signature in Cleburne homes that crews from elsewhere in the Metroplex don’t always recognize.
- Septic and well setback surprises. Johnson County’s health department reviews add 3 to 6 weeks to a permit timeline. Contractors who don’t file the affidavit first end up with a change order mid-job, and the homeowner pays for the delay.
- Grading and drainage failures on open lots. A new ADU pad set two inches below the surrounding pasture becomes a collection point for sheet flow during spring storms. We scope drainage before we quote, not after the water shows up.
Pricing for Home Additions & ADU in Cleburne, TX
Here are the numbers for Cleburne’s market, based on what we actually bid and build here:
| Project Type | Price Range |
|---|---|
| Home Addition | $45,000 - $130,000 |
| ADU Construction | $90,000 - $220,000 |
| Garage Conversion | $30,000 - $80,000 |
What moves your number: whether the job is in Cleburne city limits or unincorporated Johnson County, how far the septic and well setbacks push the structure from existing utilities, whether the foundation needs pier work, and what slab design the clay soil requires. Every allowance and every price change arrives as a written change order before work happens. The allowance that isn’t on paper is a surprise waiting for a date. Call (877) 610-1318 for a free written estimate. We do not change the price at the door.
We Also Serve Cities Near Cleburne
Our Home Additions & ADU in Cleburne crews also build in Keene, Joshua, Burleson, and Crowley. Same owner-operated crew, same written change orders, same 90-Day Done Right Promise. If you’re on the edge of Cleburne or just outside the county line, call and we’ll tell you which permit office governs your project.
Serving Cleburne, TX - Our Local Coverage Area
We’re based in the Cleburne 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 Cleburne
It depends on whether your land is inside Cleburne city limits or in unincorporated Johnson County. Inside city limits, Cleburne issues the permit. Outside the city, Johnson County governs the project, and that means septic and well setback reviews through the health department, which add 3 to 6 weeks to the timeline. We determine the correct permitting path before we quote, and we file the health department affidavit first when the county requires it. Call (877) 610-1318 and we’ll check your address against the current permit jurisdiction.
Setbacks from the septic system and well determine where the ADU footprint can actually sit, and on many Cleburne acreage lots that pushes the structure farther from existing power than the homeowner expected. We measure the setbacks during the site walk, locate the septic and well, and factor the utility run, usually electrical from a new pole or extended underground service, into the written estimate before you sign anything. Skipping this step is how change orders happen. We don’t skip it.
Cleburne’s expansive Blackland Prairie clay requires either deep piers drilled past the active clay layer or a post-tension slab with a moisture barrier, and often both depending on the soil test. A standard floating slab will heave in the first drought-deluge cycle and crack at the roofline. We specify the slab design based on the soil report and the structure’s size, and we put it in the line item. Call (877) 610-1318 for an exact assessment of your lot.
Often yes. Cleburne’s older housing stock includes late-1800s Victorian homes around the courthouse square and mid-century brick ranch houses across established neighborhoods, and many of those foundations have been stressed by clay movement and the 2008-2009 seismic swarms. When we convert a garage, we inspect the slab and footing condition first. If pier work or reframing is required, we bring you a written change order with the cost before we proceed. The structural condition of the existing foundation is the biggest variable in a garage conversion price. Call (877) 610-1318 to schedule a walkthrough.
We factor haul distance and equipment access into the estimate up front. Long drives mean material delivery costs, and access roads on larger lots sometimes require temporary gravel or grading just to get a concrete truck or crane to the pad. We scope that during the site walk and put every line item in writing. There’s no surprise delivery fee at the end. If you’re building off County Road 806 or any of the county roads around Cleburne, call (877) 610-1318 and we’ll walk the access route with you.
Barrett & Sons Construction is owner-operated and built on written estimates, written change orders, and permits pulled on every eligible job. If you’re planning a home addition or ADU in Cleburne, call (877) 610-1318 to schedule your free estimate. Tom or one of his sons will meet you on site, in person, with a tape measure and a clipboard.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Cleburne and Johnson County since 1998.