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 Pearland
Thinking about a room addition or a detached ADU on your Pearland property? You’re looking at $45,000 to $130,000 for a home addition, and $90,000 to $220,000 for new detached ADU construction in this market. Those are real numbers for Pearland, and they assume permits get pulled and inspections get signed. Call (877) 610-1318 if you want a straight quote instead of a phone estimate that changes by the time a crew shows up.
Tom Barrett and his sons have been building in Brazoria County long enough to know that Pearland is not Houston. Different clay, different MUD plats, different permit desks. We scope every job in writing before we quote, so you know what the county will approve and what the drainage easement will allow before you spend a dime.
Why Barrett & Sons Construction Is Pearland’s Preferred Home Additions & ADU Company
We’re an owner-operated outfit founded in 1998, not a franchise dispatching strangers from two counties away. Tom Barrett’s name and license number are published where you can look them up. When you call (877) 610-1318, a live person answers. When you walk the job site, you’ll see Tom or one of his sons. That’s how we’ve run it for over 29 years, and it’s why homeowners in Silverlake and Shadow Creek Ranch keep our number in their phones.
In Pearland, the construction questions get complicated fast. MUD drainage easements. Brazoria County flood elevation rules. Slab-on-grade additions that have to tie into post-tension foundations. We’ve scoped enough of these jobs to know what the inspector will flag before he flags it. Every permit gets pulled. Every change order gets written before work proceeds. And every job carries our 90-Day Done Right Promise: if something isn’t right, call and Tom comes back.
People in Pearland tell us the same thing again and again: they got burned by a contractor who quoted one number on the phone and handed them a different bill at the door. We don’t work that way. Allowances in writing. Scopes in writing. Price changes in writing. You’ll never get a surprise invoice from us.
Our Home Additions & ADU Services in Pearland
ADU Design & Permitting
This is where most Pearland ADU projects get won or lost before the first hammer swings. A detached ADU that looks fine on paper often fails MUD plat review because a drainage swale crosses the buildable corner or a phased utility easement pinches the footprint. We pull the plat, we walk the lot, and we submit a site plan the MUD and Brazoria County will both sign. No red tags after concrete is poured.
Garage Conversion ADU
Converting an existing garage in a Pearland production-built home means working around post-tension slab edges, existing HVAC runs, and door openings sized to a 2005-era floor plan. Most garage conversions in Pearland run $30,000 to $80,000 depending on whether you need plumbing rough-in, a wet wall, and separate meter wiring. We scope all of it before we give you a number.
New Detached ADU
New detached ADU construction on a Pearland lot means dealing with Beaumont clay, slope and drainage, and long material hauls from Houston suppliers. We budget for soil testing, fill, and swale re-grading up front, not as a surprise line item at rough-in. On acreage outside MUD boundaries, septic and well setbacks shift the buildable envelope, and we verify those before you buy plans.
Junior ADU & Interior Conversion
A junior ADU inside the existing footprint, whether it’s a converted bedroom wing or a private suite over the garage, is the most economical way to add rental or multi-generational space in Pearland. These jobs hinge on fire separation, egress, and ceiling height requirements. We handle the permit drawings and the build, so the inspector signs off the first time.
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 Pearland
When we frame an addition or a detached ADU in Pearland, we install materials you can look up and verify. Simonton windows on bedroom additions. PGT impact-rated glazing on sun-facing elevations off Broadway. Ply Gem siding on detached units where the HOA requires a specific profile. We stock local parts for Pearland jobs and order direct from our suppliers, so lead times stay short and the brand on the label is the brand we quoted.
Common Home Additions & ADU Problems We See in Pearland Homes
- MUD drainage easements blocking the build. Phased utility easements and swale requirements in MUD-platted subdivisions often mean a rear-lot ADU has to shift several feet off the ideal footprint. We check the plat before you commit to plans.
- Beaumont clay heaving slab tie-ins. Pearland’s expansive clay shrinks and swells with the wet and dry seasons. A room addition tied into a post-tension slab without soil testing can crack at the joint within two wet-dry cycles. We test first.
- Permit sequence confusion. Assuming Brazoria County is the only authority in Pearland is a common mistake. MUD review, county permits, and city code all have to line up in order, and skipping one step can stop the job cold.
- Under-bid haul-off and material runs. Long hauls from Houston suppliers, plus delivery and dump fees on a rear-lot ADU, eat a budget fast. We line-item those costs before we quote, so the allowance doesn’t evaporate at rough-in.
Pricing for Home Additions & ADU in Pearland, TX
A home addition in Pearland typically runs from $45,000 to $130,000. Detached ADU construction runs $90,000 to $220,000. A garage conversion is $30,000 to $80,000. Those ranges reflect Pearland-specific reality: MUD plat review, Brazoria County flood elevation rules, soil testing on Beaumont clay, and the cost of long material hauls from Houston. The size of the footprint, the plumbing rough-in, and the grading plan move the number more than anything else. Call (877) 610-1318 for a free estimate. We give you a written line-item quote before you agree to anything.
| Project Type | Typical Price Range in Pearland |
|---|---|
| Home Addition | $45,000 - $130,000 |
| ADU Construction | $90,000 - $220,000 |
| Garage Conversion | $30,000 - $80,000 |
We Also Serve Cities Near Pearland
Our crews cover Pearland and the surrounding communities, including Friendswood, Manvel, Webster, and Alvin. If you live outside Pearland proper but your property sits on the same heavy clay and MUD-platted subdivisions, the same scoping rules apply. We’re an Home Additions & ADU contractor who works the whole Brazoria County side of the metro, not just one ZIP code. Check the Home Additions & ADU in Pearland page for pricing and permit details specific to this market.
Serving Pearland, TX - Our Local Coverage Area
We’re based in the Pearland 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 Pearland
In most Pearland subdivisions platted through a Municipal Utility District, you need both: MUD plat review for drainage easements and utility setbacks comes first, then Brazoria County permits and city code sign-off. Skipping the MUD step is the fastest way to get a stop-work order after concrete is poured. Call (877) 610-1318 and we’ll pull the plat before you finalize plans.
On acreage outside MUD boundaries, septic tanks, leach fields, and water wells each have required setback distances from any new structure. Those setbacks, plus easement lines, define the buildable envelope before you ever think about a foundation. We verify all of them before quoting, so the ADU goes where it’s actually legal to build. Call for a free estimate and we’ll walk the lot with you.
A second-story addition over an existing Silverlake slab depends on the slab’s post-tension design, the soil underneath it, and the framing’s load path. We core-sample the slab, check the original engineering, and verify the soil hasn’t heaved before we say yes or no. Sometimes the answer is yes with minor footings; sometimes the slab needs isolation work. We tell you before you pay for structural drawings.
Shadow Creek Ranch lots slope toward MUD drainage swales and detention areas, and Brazoria County’s post-Harvey elevation rules require finished floor heights and positive drainage plans that older subdivisions ignored. Fill, swale re-grading, and sometimes a French drain or catch basin add real cost to a foundation scoped on paper. We line-item those costs in the quote, so you’re not surprised at the draw schedule. Call (877) 610-1318 for a written estimate.
Rear-lot ADUs in Pearland often sit 100 feet or more from the street, which means material runs, concrete pumps, and dumpster placements all cost more than a front-lot build. We pad the schedule and the haul-off allowance for long runs from Houston suppliers. We don’t under-bid those line items, because an allowance that isn’t on paper is a surprise waiting for a date.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Pearland since 1998.