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 Amarillo
If you’re adding square footage in Amarillo, plan on two things before the first footing is poured: the wind, and the rock. A conventional room addition or ADU in the 79119, 79120, 79121, or 79124 zip codes typically runs $45,000 to $130,000 for the build, with detached ADUs landing higher, usually $90,000 to $220,000 once caliche excavation and utilities are accounted for. We’ve spent 29 years on High Plains job sites, and we don’t start a foundation estimate without checking what’s under the grass. Call (877) 610-1318 and we’ll walk your property with you before writing a single number.
Tom Barrett runs Barrett & Sons Construction the same way he did in 1998: his name is on the truck, his sons run the crews, and every permit gets pulled. When the Panhandle wind gusts past 50 mph in October and a lesser crew’s tarp ends up in Potter County, we’re the ones who tied down twice. That’s not a slogan. That’s two decades of Amarillo winters.
Why Barrett & Sons Construction Is Amarillo’s Preferred Home Additions & ADU Company
Most Amarillo homeowners who call us have already been burned by an out-of-town company that quoted one figure over the phone and handed them a different bill at the door. We don’t play that game. Every allowance, every scope change, every price adjustment at Barrett & Sons arrives as a written change order before work moves forward. The allowance that isn’t on paper is a surprise waiting for a date, and our customers in Amarillo don’t get surprises on closing day.
Homeowners in neighborhoods like Wolflin, Sleepy Hollow, and City View tell us the same thing: they’d rather pay a contractor they can find at the hardware store on Saturday than save a few thousand on a crew they’ll never see again. Tom publishes his name, his address, and his license number. Look it up before you sign anything. We also answer our own phone 24/7. You won’t reach a call center in another state. You’ll reach a person who knows what caliche does to a trenching estimate.
On every job across Amarillo, background-checked crew members show up in Barrett & Sons uniforms. Permits get pulled and inspections get signed. And the 90-Day Done Right Promise is written into the contract in plain English: if it’s not done right, one call brings Tom back. That promise matters more on a $120,000 ADU than on a $400 repair, and we honor it the same either way.
Our Home Additions & ADU Services in Amarillo
ADU Design & Permitting
An accessory dwelling unit in Amarillo isn’t just a construction project; it’s a paperwork project with a foundation underneath it. City of Amarillo setback requirements, utility easements, and floodplain designations all shape what you can legally build, and where. We handle the design drawings, the permit submittal, and the inspections, so you don’t have to learn the difference between a development permit and a building permit. Most Amarillo ADU builds we take on include full design and permitting in the $90,000 to $220,000 range, depending on size and site conditions.
Garage Conversion ADU
Converting an attached garage is the most cost-effective path to an ADU in Amarillo, and we see a lot of them in 1960s and 1970s ranch neighborhoods where the original two-car garage now holds a boat and boxes. Since the structure already exists, you’re saving on foundation and framing, though we still need to address insulation, egress windows, and electrical panel capacity. Garage conversions in Amarillo typically run $30,000 to $80,000, and the caliche question mostly disappears since you’re working with an existing slab.
New Detached ADU
A standalone ADU on your property gives you a separate address, a separate meter, and a separate lease if you want rental income, but it comes with every High Plains challenge at once: fresh excavation, new utility trenching, and wind-rated framing from the slab up. In Amarillo, a new detached ADU generally runs $90,000 to $220,000, and the caliche line item is not optional. We’ve trenched through 18 inches of calcium carbonate in the Hillside Terrace area that would’ve cracked a rental trencher in half. Our crews bring the right equipment the first day, because we know what’s under this city.
Junior ADU & Interior Conversion
A junior ADU is a smaller, simpler version: a converted bedroom with its own entrance, a kitchenette, and a bathroom, built within the footprint of your existing home. For Amarillo homeowners who want an aging parent close by or a semi-independent space for an adult child, this is often the smartest money. Interior conversions avoid the caliche problem entirely and usually land on the lower end of the $45,000 to $130,000 home addition range, depending on plumbing work and whether you’re adding a separate entrance through an exterior brick wall.
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 Amarillo
You should be able to look up every material that goes into your addition or ADU. On Amarillo jobs we install Simonton windows when customers want a proven wind-rated name, and Ply Gem or PGT when the project calls for impact-rated frames that can take a Panhandle hailstorm without the glass spidering. For a full upgrade, ask about our Windows & Doors in Amarillo options. We don’t stock mystery brands off a van door. If we’re not willing to put it on our own homes, we don’t put it on yours. Ordering is local when it can be and fast when it can’t, because nobody wants a framed addition sitting exposed through a spring wind stretch.
Common Home Additions & ADU Problems We See in Amarillo Homes
- Caliche hits at 12 to 18 inches. Across much of Amarillo, the hardpan shows up just below the topsoil, which turns standard footing work into rock-breaking work. Out-of-town crews who don’t budget for it lose their shirts, and some walk off the job. We line-item it in writing before we ever touch the ground.
- High-wind framing failures on new additions. Amarillo sustains winds that would be a weather emergency in Dallas. An addition tied into a 1960s ranch home without proper shear bracing and uplift straps will pull at the roofline within the first year. We frame to High Plains wind code, not to some generic national standard.
- Expansive clay soil under older slabs. East Amarillo homes from the pre-WWII era sit on soils that swell in wet years and shrink in drought. Add a room onto a slab that’s already moving and you’ll get cracks at the tie-in line. We check existing slab stability before we design the connection.
- Undersized electrical panels on garage conversions. Older Amarillo homes were built for a 60-amp or 100-amp panel, not for an ADU with a mini-split, a kitchenette, and a water heater. We’ll tell you if a panel upgrade is required and why, and it’ll be in the written scope, not a surprise invoice at the end.
Pricing for Home Additions & ADU in Amarillo, TX
Here’s the honest picture. A conventional room addition in Amarillo runs $45,000 to $130,000, with the final number shaped by square footage, roofline tie-in, foundation conditions, and finish level. A garage conversion ADU lands between $30,000 and $80,000. A new detached ADU is the big one: $90,000 to $220,000, because you’re paying for a full foundation, full utilities, and full weather envelope. Before you commit to any number, call (877) 610-1318 and schedule a free estimate. We’ll walk the property, check for caliche, check the existing structure, and give you a written line-item quote. No trip charge to come out if you’re inside the county. And if you already have a written estimate from another contractor, bring it in and we’ll give you a free second opinion on it.
One more thing about price: it won’t move after we start unless you ask it to. Every scope change arrives as a written change order before work happens. You approve it, you sign it, then we move. That’s how Tom has run Barrett & Sons since 1998, and it’s how his sons run crews across Amarillo today.
We Also Serve Cities Near Amarillo
Beyond Amarillo proper, our crews take on additions and ADU work in Canyon, Lubbock, Levelland, and Slaton. If you’re in the Panhandle and you’ve been quoted a price by someone who doesn’t know what caliche is, call us before you sign. We also handle Kitchen Remodeling in Amarillo and Bathroom Remodeling in Amarillo when your addition project grows to include updating the original footprint. For full details on the range of Home Additions & ADU work we do across the region, or to see how we serve Home Additions & ADU in Amarillo specifically, give us a call at (877) 610-1318.
Serving Amarillo, TX - Our Local Coverage Area
We’re based in the Amarillo 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 Amarillo
A room addition in Amarillo typically costs $45,000 to $130,000, while a new detached ADU runs $90,000 to $220,000 and a garage conversion lands between $30,000 and $80,000. Caliche excavation, wind-rated framing, and finish selections are the three biggest variables. Call (877) 610-1318 for an exact quote on your property, and the estimate is free.
Yes, we pull permits and sign inspections on every eligible ADU and addition job in Amarillo. The permit inspector works for you, not for us, which is exactly why we like him there. If a contractor tells you permits are optional on a new addition, walk away.
Amarillo’s caliche hardpan can begin 12 to 18 inches below grade, which means footing excavation often requires rock-breaking equipment and adds real cost to any addition that needs new foundation work. We include a caliche line item in our written estimates before we visit most sites, because across much of Amarillo, hitting rock is the rule, not the exception.
No, not unless you ask for a change. Every change at Barrett & Sons arrives as a written change order before work happens: scope in writing, allowances in writing, change orders in writing. That’s been the rule since 1998, and it’s why Amarillo homeowners who’ve been burned by surprise invoices come to us.
Every completed job carries the 90-Day Done Right Promise in writing: if it’s not done right, one call brings Tom Barrett back to make it right. For a $100,000 ADU, that promise is the difference between a contractor you hope will answer and one you know will. Call (877) 610-1318 to schedule your free estimate.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Amarillo since 1998.