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 South Houston
Adding square footage on a pier-and-beam house in South Houston is not the same job as building on a fresh slab in a master-planned community up the highway. The lots are narrower, the drainage is touchier, and the permit desk answers to South Houston’s own building department, not Harris County. We’re Barrett & Sons Construction, and our Home Additions & ADU team knows what those words mean for your project before the first board is cut. Call (877) 610-1318 and we’ll talk about your house, your lot, and what it will actually take to get it done right.
Why Barrett & Sons Construction Is South Houston’s Preferred Home Additions & ADU Company
Tom Barrett started this company in 1998, and his sons run the crews. When we say we’ve seen what happens to South Houston homes, we mean the rotted sills under 1950s frame additions, the galvanized supply lines that crumble in your hand, and the slab cracks that follow every dry summer. We do not send a stranger with a clipboard. The person who shakes your hand at the estimate is the same person you’ll see on the jobsite, and he lives twenty minutes away. If something isn’t right, we hear about it at the hardware store. That is exactly why we want it done right the first time.
South Houston homeowners have told us the same story for 29 years: a company quoted one price on the phone, then handed over a different bill after the drywall was up. That’s why every scope, every allowance, every change on a Barrett & Sons job arrives as a written change order before any work happens. Permits get pulled through South Houston’s own building department, and inspections get signed. The permit inspector works for you, not for me, which is precisely why I like having him on the job. Ask anyone along Spencer Highway, or look up the license number yourself.
Our Home Additions & ADU Services in South Houston
ADU Design & Permitting
A detached accessory dwelling unit in 77587 means working inside South Houston’s municipal code, which has its own setback requirements, lot-coverage limits, and utility connection rules. We handle the design, the drawings, and the permit package as one piece of work, so you’re not paying an architect to guess what the building department will accept. Most of the ADU plans we prepare for South Houston lots are designed around Harvey-era finished floor elevation minimums, because ignoring those will kill a project at plan review.
Garage Conversion ADU
Many 1940s and 1950s South Houston homes have detached garages that were built as cheap storage, not living space. Converting one into a rentable ADU means correcting the slab, upgrading the electrical panel, adding insulation, and often replacing the entire roof structure. We quote that work in writing before we start, and we’ve converted enough garages off College Avenue to know which ones hide surprises. Budget for a garage conversion in South Houston between $30,000 and $80,000, depending on what the original builder left you.
New Detached ADU
If your lot has the room and the zoning allows it, a new detached ADU is often the cleanest way to add a rental unit or a home for an aging parent. South Houston’s older lots tend to be deeper than they are wide, which suits a long, narrow ADU footprint. We build the structure, run the utilities, and handle the floodplain documentation that Harvey-era code now requires. Expect a ground-up ADU in South Houston to run $90,000 to $220,000, with final numbers tied to finishes, site conditions, and utility connection distances.
Junior ADU & Interior Conversion
When a full addition doesn’t make sense, a junior ADU carved out of an existing home is often the most practical answer. We convert attached garages, enclosed porches, and underused rear bedrooms into self-contained units with their own entrance, kitchenette, and bath. In South Houston, where many houses date to the post-WWII boom, we frequently find unpermitted work lurking behind drywall, especially in homes bought between 2018 and 2021. We budget for that before we start, not after we open the 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.
Other Additions We Build in South Houston
Beyond ADUs, our South Houston crews handle room additions, second-story additions, and sunrooms or enclosed patios. Room additions in this market typically run $45,000 to $130,000, and we’ll tell you honestly whether your existing foundation and framing can carry the load, or whether you’re better off with a detached structure. Many South Houston homes have 60-amp or 100-amp electrical panels that are already overloaded, so any meaningful addition means a panel upgrade is part of the scope. We don’t hide that. We put it in the first written estimate.
Trusted Brands We Service in South Houston
We install windows and doors from Simonton, Ply Gem, and PGT, and we stock the sizes that show up most often on South Houston’s post-war homes. If you’re adding a room, the window schedule matters, and we’d rather specify a brand you can look up than a mystery unit off a van. That same rule applies everywhere on an addition: named materials, written allowances, and prices you can verify before we order anything.
Common Home Additions & ADU Problems We See in South Houston Homes
- Pier-and-beam rot and settling. The 1940s through 1960s homes that dominate South Houston were built fast on cypress or pine piers, and after 70 years of Gulf Coast humidity, many sills are soft. Any addition starts with a foundation inspection, because adding weight to a failing pier system is a recipe for a cracked addition.
- Undersized electrical panels. A 100-amp panel may have been fine in 1955. Add a kitchenette, a mini-split, and a washer-dryer stack to a new ADU and you’re over the limit. We include panel upgrades in our South Houston quotes up front, in writing.
- Hidden Harvey-era unpermitted work. Homes rebuilt quickly after the 2017 floods sometimes carry electrical, structural, and HVAC work that never saw an inspector. We know what to look for and we price the correction into the estimate, so you’re not shocked mid-job.
- Beaumont clay movement. The expansive clay under South Houston swells in wet seasons and shrinks in dry ones, which cracks slabs and pulls additions away from the original structure. Proper drainage planning and foundation design are not optional extras here.
Pricing for Home Additions & ADU in South Houston, TX
Home additions in South Houston generally run $45,000 to $130,000. A garage conversion lands between $30,000 and $80,000, while a new detached ADU runs $90,000 to $220,000. Those numbers include the work this market actually requires: permit fees through South Houston’s building department, drainage corrections for the clay soils, and panel upgrades on older homes. Your exact price depends on square footage, finish level, foundation condition, and what the inspector finds when we open things up. Every number in this paragraph is a real range from our South Houston estimates, not a national average. Call (877) 610-1318 and we’ll give you an exact line-item quote. Free estimate, no trip charge inside the county.
We Also Serve Cities Near South Houston
Our crews work throughout the Ship Channel corridor and the surrounding communities. If you’re in Pasadena, Galena Park, Deer Park, or Jacinto City, the same crew and the same written pricing process applies. We’re a local company serving South Houston and its neighbors, not a franchise dispatching from another state.
Serving South Houston, TX - Our Local Coverage Area
We’re based in the South Houston 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 South Houston
We can typically begin within a few weeks of permit approval, and we handle the permit submission through South Houston’s building department as part of our scope. Permitting timelines in 77587 vary with the department’s workload, but we’re on the schedule and tracking it for you. Call (877) 610-1318 and we’ll give you a realistic start date, not an optimistic one.
Yes, we cover all of 77587, including the neighborhoods along Spencer Highway, College Avenue, and the residential streets east of Highway 3. We know the housing stock, the permit office, and the drainage patterns. That local knowledge is the whole reason you hire us instead of a company that drives in from across the metro.
Only if the scope changes, and only in writing. If we open a wall in a 1956 South Houston house and find rot the original owners never fixed, you’ll get a written change order with a specific number before we proceed. No change order, no extra charge. That’s the rule on every Barrett & Sons job. It’s also the reason people who’ve been burned once tend to call us first the second time.
South Houston prices run about the same as Pasadena and Galena Park, but the older housing stock tends to add foundation and electrical scope that newer neighborhoods don’t need. A room addition in South Houston typically runs $45,000 to $130,000, which reflects the pier-and-beam reality of the local homes. For an exact number, call (877) 610-1318 for a free estimate, and if you already have a written bid from someone else, we’ll give you a free second opinion on it.
Every eligible job includes permits pulled through South Houston’s own building department and inspections signed by the city. We don’t do unpermitted work, and we won’t pretend a permit is optional. The inspector works for you, and we want him on the job. It’s the only way the work stands behind its own paperwork.
Planning a Kitchen or Bath to Go With That Addition?
Most additions in South Houston come with a new kitchen or bathroom attached to the plan, and we handle those trades with the same crews and the same written pricing. If your project includes a kitchen, take a look at our Kitchen Remodeling in South Houston page. If it’s a bath, the Bathroom Remodeling in South Houston page covers what we do. Or just call and ask for Tom. He will tell you straight what the job needs.
Ready to Talk About Your South Houston Addition?
Call Barrett & Sons Construction at (877) 610-1318 for a free estimate on any home addition or ADU in South Houston. We’ll walk the lot, check the foundation, look at the panel, and hand you a written line-item quote. If you got a number from someone else, bring it, and we’ll give you a second opinion free. Tom Barrett’s name, address, and license number are published and verifiable. Look us up before you sign anything.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving South Houston and the surrounding communities since 1998.