Home Additions & ADU in Greatwood - One Fixed Price, Permits Handled

Fast, Reliable Home Additions & ADU Across Greatwood

Home additions in Greatwood run $45,000 to $130,000 depending on square footage, foundation requirements, and HOA review scope. A detached ADU typically lands between $90,000 and $220,000, while a garage conversion runs $30,000 to $80,000. Those numbers are sized to Greatwood’s clay-soil foundation realities and HOA architectural standards, not pulled from a national average sheet. If you’re weighing a room addition, second story, or ADU in the 77469 zip code, call Barrett & Sons at (877) 610-1318 and we’ll give you a written scope with line-item pricing before anything gets torn out.

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Why Barrett & Sons Construction Is Greatwood’s Preferred Home Additions & ADU Company

Tom Barrett started this company in 1998 and his sons run the crews. When we work in Greatwood, we’re the ones on the job site most days - not a franchise dispatching strangers from two counties over. The homes here, mostly brick-veneer slabs built between 1988 and 2012, hit their first major structural cycle years ago. We’re now seeing 15 to 35-year-old framing and roofing systems in Greatwood that need real attention before any addition can tie in cleanly. That’s not a surprise to us; it’s the normal starting point.

We answer our own phone. A live person picks up 24 hours a day, seven days a week - no voicemail maze, no out-of-state call center. When a Greatwood homeowner calls about a room addition off Crabb River Road or a second-story pop-top near Canyon Gate, the person answering knows the area and knows what HOA review involves here. Tom publishes his name, address, and license number. Look it up before you sign. Then look at our written change-order record: every allowance, every price adjustment, every scope change arrives on paper before a nail moves. Permits get pulled and inspections get signed on every eligible job. The permit inspector works for you, not for me - that’s why I like him.

Our Home Additions & ADU team also handles Kitchen Remodeling in Greatwood and Bathroom Remodeling in Greatwood when an addition naturally extends into those spaces. One crew, one contract, one name on the truck.

Our Home Additions & ADU Services in Greatwood

Greatwood isn’t a generic suburb. It’s a master-planned community stretched along the Brazos River corridor in Fort Bend County, built out between the late 1980s and early 2010s. The homes sit on expansive black clay. Parts of the neighborhood fall within the Brazos floodplain. Hurricane Harvey put hundreds of Greatwood homes underwater in 2017. Those three facts shape every addition and ADU we scope here.

ADU Design & Permitting

Adding a detached ADU in Greatwood means coordinating three approval tracks: HOA architectural review, Fort Bend County permitting, and - in floodplain-adjacent sections - FEMA elevation compliance. We handle all three as one scope. You shouldn’t have to call three different offices. We also produce elevation certificates when a site inspection requires one, which happens more often in Greatwood than in neighboring cities on sandier ground.

Garage Conversion ADU

A garage conversion in Greatwood typically runs $30,000 to $80,000 and is the fastest path to an income suite or multigenerational apartment. The catch: your slab was poured for a garage, not living space. We assess drainage, insulation, and foundation movement before any drywall goes up. Fort Bend’s shrink-swell clay has moved every slab in Greatwood at least a little since the home was built. We measure that movement and account for it.

New Detached ADU

A new detached ADU in Greatwood runs $90,000 to $220,000. The spread comes down to size, utility trenching distance, and whether the lot sits near enough to the floodplain for a pier-grade foundation. We’ve installed engineered pier systems on Greatwood additions that would have used conventional footings in Sugar Land or New Territory. Different soil, different engineering, different price.

Junior ADU & Interior Conversion

A junior ADU - think attached suite with its own entrance, mini-kitchen, and bath - often runs $45,000 to $90,000 in Greatwood. It’s the most affordable way to add generational housing without the full detached-ADU price tag. Interior conversions also skirt the HOA’s heavy exterior-review process since the home’s footprint and elevations stay untouched.

Trusted Brands We Service in Greatwood

We install materials Greatwood homeowners can look up and verify, not mystery brands off a van. In kitchens and baths we carry Schluter waterproofing systems and Grohe fixtures. On roofs tied into second-story additions, we install GAF systems with the manufacturer’s warranty intact. When a Greatwood customer calls, we can verify inventory and lead times same day - no “let me check and call you back next week” runaround. The name on the material box is a promise, same as the name on the truck.

Common Home Additions & ADU Problems We See in Greatwood Homes

• HOA architectural review delays. Greatwood is entirely HOA-governed. Exterior modifications require written architectural approval before permits get pulled. We photograph, document, and submit the package; you shouldn’t lose three weeks because the board asked for a fence elevation drawing nobody told you about.
• FEMA substantial improvement triggers. In floodplain-adjacent sections of Greatwood, structural work that cumulatively exceeds 50% of the pre-damage assessed value brings mandatory flood-elevation compliance. On post-Harvey rebuild homes, that threshold may already be nearly met. We check before you commit.
• Clay-soil foundation movement. Fort Bend’s shrink-swell clay expands in wet winters and contracts in 105°F summers, racking door frames and cracking brick veneer. Any addition tied into an existing slab needs a structural engineer’s read, not a “we’ve done this before” handshake.
• Aging original framing behind good-looking brick. A 1995-vintage Greatwood home looks fine from the curb, but the wall cavities often hide original 2×4 framing with electrical that predates modern code. Tying a new addition into that framing and panel requires a real plan, not an extension cord and a prayer.

Pricing for Home Additions & ADU in Greatwood, TX

Key Takeaways for Greatwood Homeowners

• Home additions in Greatwood run $45,000-$130,000; detached ADUs run $90,000-$220,000.
• HOA architectural review and FEMA floodplain rules are normal parts of Greatwood construction - not optional extras.
• Fort Bend’s clay soil usually means engineered piers or deep footings, not standard slabs.
• Barrett & Sons has been owner-operated since 1998, with Tom and his sons on-site and a 90-Day Done Right Promise in writing on every contract.
• Permits pulled, inspections signed, and every price change arrives as a written change order - no surprises at the end.

We Also Serve Cities Near Greatwood

While this page is written for Greatwood, our crews also take calls from Sugar Land, New Territory, Pecan Grove, and Four Corners. The same foundation realities and HOA review habits apply in most of those communities, so the pricing stays consistent and the process stays the same. If you’re just outside the 77469 line, we’ll still come out and write the estimate. See our Greatwood page for more on how we cover the wider area.

FAQs - Home Additions & ADU in Greatwood