Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Before
After
Before
After
Before
AfterFast, Reliable Home Additions & ADU Across Cinco Ranch
Home additions and ADU construction in Cinco Ranch typically run $45,000 to $130,000, with detached ADUs landing closer to $90,000 to $220,000 once site work, utilities, and finishes are accounted for. The numbers swing based on foundation work, HOA submittals, and how much soil correction the Katy Prairie asks for. We’ve been building and remodeling in this part of Texas long enough to know that a room addition here is never just framing and drywall. It’s a decision about how your house sits on clay. If you’re weighing an addition, a garage conversion, or a full detached ADU, call us at (877) 610-1318 and we’ll give you honest numbers before you sign anything.
Why Barrett & Sons Construction Is Cinco Ranch’s Preferred Home Additions & ADU Company
Tom Barrett started this company in 1998, and his sons run the crews that work in Cinco Ranch today. When a homeowner on Spring Green Boulevard calls about a cracked slab or a garage conversion, the person answering is one of us, not a call center. We know the neighborhoods between Westheimer Parkway and Cinco Ranch Boulevard. We’ve worked on homes near La Centerra, in the sections off Mason Road, and throughout the 77450 zip code. When your home addition requires a foundation inspection or an ACC submittal, we don’t look at you funny. We’ve done it.
Every job we take in Cinco Ranch comes with a written scope, written allowances, and written change orders before any price moves. Tom publishes his name, his address, and his license number. You can look it up before you sign anything. Ask anyone on your street. Or call the permit office and see whose name keeps showing up on clean inspections.
Our Home Additions & ADU Services in Cinco Ranch
ADU Design & Permitting
A detached ADU in Cinco Ranch isn’t a shed with a mini-split. The HOA architectural control committee wants materials specs, color palettes, and elevation drawings before a shovel touches dirt. We handle that paperwork as part of the build. Our Home Additions & ADU team has worked through enough ACC submittals in Cinco Ranch to know what gets approved the first time and what gets kicked back. We also pull every permit, because the inspector works for you, not for us. That’s why we like him around.
Garage Conversion ADU
Converting an attached garage in Cinco Ranch typically costs $30,000 to $80,000 depending on plumbing rough-ins, insulation, and whether you’re adding a kitchenette. Houses here were built between 1995 and 2015, mostly brick veneer on post-tension slabs. That means your garage floor may have settled slightly over the years. We check slab elevation and moisture levels before we frame a wall, because a door that doesn’t close after month six is a call we don’t want you to make.
New Detached ADU
Building a detached ADU in Cinco Ranch means dealing with black clay soil that swells in wet years and shrinks in drought summers. It means soil-stabilized site prep, often French drains or grade corrections, and sometimes more concrete than you’d expect. None of that is optional on Katy Prairie expansive clay. A new detached ADU here runs $90,000 to $220,000, and the number on the low end assumes a simple foundation and short utility runs.
Junior ADU & Interior Conversion
A junior ADU, often a bedroom suite with a kitchenette inside an existing home in Cinco Ranch, runs $45,000 to $130,000 depending on scope. We’ve converted upstairs bonus rooms, enclosed formal dining spaces, and guest wings into what are effectively small apartments with private entries. If you’re also thinking about upgrading the main house, we handle Kitchen Remodeling in Cinco Ranch and Bathroom Remodeling in Cinco Ranch as part of the same permit package, which saves you time and inspection fees.
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.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Cinco Ranch
When we set plumbing fixtures or tie a new bathroom into existing lines, we use brands our customers can look up: Schluter for waterproofing, Grohe for fixtures, and Sterling for tubs and shower bases. We don’t put mystery brands in your home and call it premium. The materials show up on the written scope, the allowance sheet lists what’s allowed, and if you want to see the brand name before we order, just ask. For Cinco Ranch customers who are adding a sunroom or enclosed patio, GAF underlayment and flashing standards apply where roofing intersects the new structure. Same materials we use on roof replacements.
Common Home Additions & ADU Problems We See in Cinco Ranch Homes
- Slab cracks and foundation movement: Cinco Ranch sits on Katy Prairie expansive black clay. Homes built between 1995 and 2015 are now showing seasonal movement, and any ground-level addition has to be designed with that in mind or the new slab will separate from the existing one.
- HOA submittal rejections: Cinco Ranch’s architectural control committees are among the strictest in the Houston metro. Exterior additions and detached structures need pre-approval with materials specs and color palettes. We handle that, and we don’t let it stall your project.
- Drainage and grade issues: After Hurricane Harvey, FEMA remapped many Cinco Ranch neighborhoods into higher-risk flood zones. New construction and additions often need first-floor elevation compliance and updated drainage design. We plan for that during site prep, not after the slab is poured.
- Utility tie-in complications: Master-planned subdivisions like Cinco Ranch have strict utility easements and set-back requirements. Running water, sewer, and electrical to a detached ADU requires coordination with HOA guidelines and county permitting. We’ve done enough of these to know where the lines run.
Pricing for Home Additions & ADU in Cinco Ranch, TX
A home addition in Cinco Ranch runs $45,000 to $130,000. A garage conversion lands between $30,000 and $80,000. A new detached ADU is $90,000 to $220,000. The spread comes from foundation work, HOA submittal costs, utility tie-ins, and whether soil stabilization becomes part of the job. You won’t get a ballpark that means anything without someone looking at your lot. We give free estimates, and every number is in writing before work starts. An allowance that isn’t on paper is a surprise waiting for a date. Call (877) 610-1318 and we’ll come look.
We Also Serve Cities Near Cinco Ranch
If you’re in Pecan Grove, Four Corners, Mission Bend, or Alief, we cover those areas too. Same owner-operated crews, same written change orders. For more on what we do across the region, see Home Additions & ADU in Cinco Ranch and the surrounding communities we serve.
Serving Cinco Ranch, TX - Our Local Coverage Area
We’re based in the Cinco Ranch 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 Cinco Ranch
Most Cinco Ranch additions move from signed contract to permit submittal within two to three weeks, and from there the schedule depends on HOA review and county inspection windows. We answer our own phones, so the person who quotes your project is the person you’ll see on-site. Call (877) 610-1318 for a current start window.
Yes. We prepare the architectural control committee submittal for exterior additions and detached ADUs in Cinco Ranch, including materials specs and color palettes. The ACC process here is active and specific, and we’d rather handle it ourselves than watch a client’s project get delayed over a trim color mismatch. Permits are pulled on every eligible job and inspections signed.
A garage conversion in Cinco Ranch runs $30,000 to $80,000, which is similar to Mission Bend and Four Corners but tends to run slightly higher than Pecan Grove because of HOA submittal requirements and drainage compliance in the 77450 zip code. Every price change on our jobs arrives as a written change order before work proceeds, so the number you sign is the number you pay.
Yes, and it’s the single biggest cost variable on ground-level additions here. The Katy Prairie black clay shrinks in drought and swells after heavy rain, so we plan for soil stabilization, French drains, or grade correction on most addition projects in Cinco Ranch. A builder who ignores that gives you cracks in year three. We don’t ignore it.
Every home addition and ADU project in Cinco Ranch comes with the 90-Day Done Right Promise in writing. If something isn’t done right, Tom comes back and makes it right with one phone call. That’s on the contract, not in the fine print. Call (877) 610-1318 for a free estimate.
Call Barrett & Sons Construction at (877) 610-1318 to schedule your free estimate for a home addition or ADU in Cinco Ranch. We’ll send Tom’s own crew, walk your property, check the soil and the HOA requirements, and give you numbers in writing. No trip charge inside the county, no mystery allowances, and a 10% senior and veteran discount on every project.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Cinco Ranch and the surrounding communities.