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 Selma
Home additions and ADU construction in Selma, TX typically run $45,000-$130,000 for most room additions, while a full detached ADU usually lands between $90,000 and $220,000 depending on size and site conditions. Those aren’t national averages, they’re what we see on actual bids in the 93662 ZIP and the surrounding stretch of the San Joaquin Valley. If you’re weighing whether to add on or build a separate unit, the first question isn’t square footage. It’s your soil. Selma sits on expansive adobe clay that swells with winter rain and shrinks hard through the 105°F summers. That reality drives foundation design, slab prep, and where your money goes before a single wall goes up. Call our Home Additions & ADU team at (877) 610-1318 and we’ll walk you through what your lot actually needs.
Why Barrett & Sons Construction Is Selma’s Preferred Home Additions & ADU Company
Tom Barrett started this company in 1998, and he still answers his own phone. His sons run the crews that show up in Selma, not subcontractors pulled off a board. When a Selma homeowner signs with us, they know who’s standing in their yard on day one and who to call if something isn’t right on day ninety. The 90-Day Done Right Promise is written into every contract we sign, including every addition and ADU we build in Selma. If a detail isn’t right, Tom comes back. One call.
What sets us apart in Selma isn’t marketing language. It’s that we publish Tom’s name, address, and license number. Look them up before you sign anything. That’s the point. We also issue every scope, every allowance, and every price change as a written change order before the work happens. “An allowance that isn’t on paper,” Tom says, “is a surprise waiting for a date.” Homeowners in Selma who’ve been burned by a national outfit that quoted one number on the phone and handed them a different bill at the door understand exactly why that matters.
We coordinate scheduling from our San Antonio office, and crews serve Selma directly. A live person answers our phone 24/7. Background-checked, uniformed crew members show up with the Barrett & Sons name on their shirts. No trip charge inside the county, and we honor a permanent 10% Senior & Veteran discount on every job.
Our Home Additions & ADU Services in Selma
ADU Design & Permitting
Selma’s clay soils mean we insist on a soils report before we design anything, even a modest junior unit. Fresno County inspectors flag expansive-soil zones specifically, and they should. We handle the permit drawings, the submittals, and the inspections. Every eligible job gets permits pulled and inspections signed. The permit inspector works for you, not for me, as Tom likes to say. That’s why we like him.
Garage Conversion ADU
Converting a garage in Selma usually lands between $30,000 and $80,000. Older 1960s and 1970s homes in Selma often have slab-on-grade garage floors poured decades before moisture barriers were standard. We test for slab integrity and vapor drive before we frame a single bedroom wall. Skipping that step on expansive clay is how you get cracked tile and musty drywall two winters later.
New Detached ADU
A new detached ADU in Selma typically runs $90,000-$220,000, driven largely by foundation depth, utility trenching, and whether the city requires fire sprinklers. Selma’s summer heat punishes wood framing and roofing membranes, so we spec materials that hold up to 100°F-plus days and the dense tule fog that rolls in from November through February. That fog also affects cure times and paint schedules, which we build into the calendar rather than discovering mid-project.
Junior ADU & Interior Conversion
For Selma homeowners who need aging parents close by or grown kids back under the roof, a junior ADU carved out of an existing floor plan often costs between $45,000 and $85,000 depending on plumbing and egress. It’s the fastest path to a rentable or family unit without touching the exterior envelope. We look at your existing load-bearing walls, electrical panel capacity, and sewer line depth before we commit to a number. If you’re also considering Kitchen Remodeling in Selma as part of the project, we’ll bundle the scope early so the walls only get opened once.
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.
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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 Selma
We install materials you can look up, not mystery brands off the back of a van. On Selma additions and ADUs, that often means Simonton vinyl windows for the valley heat, PGT impact-rated units where code requires them, and Ply Gem for trim and siding that won’t warp under the August sun. If your project touches an existing bathroom along the way, we also handle Bathroom Remodeling in Selma with the same written-scope discipline. We keep parts sourced locally so the turnaround on fixes inside the 93662 ZIP is measured in days, not weeks.
Common Home Additions & ADU Problems We See in Selma Homes
- Slab cracks from expansive clay. Selma’s adobe clay swells when it’s wet and shrinks when it’s dry, and that seasonal cycle slowly tears at slabs. We see hairline cracks turn into door-binding problems inside five years when slabs were poured without proper moisture barriers.
- Undersized existing foundations. Many post-WWII tract homes in Selma were built fast and light. Adding a second story without verifying footing width and depth can be a structural mistake. We pull the plans and dig test pits before we draw.
- Attic ventilation failures. Selma’s summer attic temps regularly exceed 140°F. Poorly ventilated roofs cook insulation and force AC units to work far harder than they should. A room addition that doesn’t address the attic air path becomes a hotbox by July.
- Tule fog moisture intrusion. The winter fog belt in the southern Central Valley lingers for weeks. Any new addition with unsealed eaves, poorly flashed windows, or skipped vapor barriers will trap moisture where you can’t see it until the mold shows up on the wall.
Pricing for Home Additions & ADU in Selma, TX
A room addition in Selma runs $45,000-$130,000, with most single-story bump-outs falling between $60,000 and $90,000. ADU construction lands between $90,000 and $220,000, while garage conversions sit in the $30,000-$80,000 window depending on plumbing and electrical scope. What moves the number in Selma specifically is soil prep: a lot with heavy black cotton clay may need deeper footings or additional compaction, and that’s a real line item. We write every allowance and every cost driver into the contract before we start. No change happens without a written change order in your hand. Call (877) 610-1318 for a free, no-pressure estimate, and we’ll walk the lot with you before we quote.
| Project Type | Typical Selma Range |
|---|---|
| Room Addition | $45,000 - $130,000 |
| Detached ADU | $90,000 - $220,000 |
| Garage Conversion ADU | $30,000 - $80,000 |
| Junior ADU / Interior Conversion | $45,000 - $85,000 |
We Also Serve Cities Near Selma
Home Additions & ADU in Selma keeps us busy, but we also run crews into Schertz, Universal City, Cibolo, and Converse for homeowners who want the same written-scope discipline without the national-brand runaround. If you’re just over the Selma line and wondering whether we’ll come out, the answer is yes. Call (877) 610-1318 and tell us what you’re planning.
Serving Selma, TX - Our Local Coverage Area
We’re based in the Selma 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 Selma
Once the scope is signed and permits are submitted, we’re typically on-site in Selma within two to four weeks depending on the season and workload. Selma’s winter fog and summer heat both affect scheduling, and we plan around pour windows and curing conditions rather than promising an unrealistic start date. Call (877) 610-1318 and we’ll give you an honest timeline for your specific project.
Yes. We work across Selma’s older 1960s and 1970s tracts, the downtown bungalow streets, and the newer subdivisions throughout the 93662 ZIP. If your lot is on the edge of town near the agricultural packing sheds or out toward the raisin drying yards, soil conditions vary block by block, but we cover the whole city. Call (877) 610-1318 and we’ll come look at your specific lot.
Our pricing in Selma runs in line with the surrounding valley market, with foundation and soil prep being the variable that matters most. A room addition in Selma typically runs $45,000-$130,000, and the difference between a straightforward job and a complex one here often comes down to what the soils report reveals. Call (877) 610-1318 for a line-item quote on your specific project.
Not without a written change order in your hand first. Every scope, every allowance, and every price change we make on a Selma job arrives as a written document before any work happens. No verbal agreements, no surprise invoices at the end. If you hit an unforeseen condition, we sit down with the paperwork and walk you through the numbers before we proceed. Call (877) 610-1318 to talk through how we handle change orders.
Every project we complete in Selma carries the 90-Day Done Right Promise. It’s written on the contract, not tucked into fine print. If something’s not right within 90 days, Tom comes back and makes it right, one call. Call (877) 610-1318 and ask us about the promise before you sign anything.
Yes, permits are pulled and inspections are signed on every eligible job we do in Selma. The last contractor many homeowners used told them permits were optional. We treat the permit inspector as an ally, not an obstacle. If you’re unsure whether your project needs a permit, call (877) 610-1318 and we’ll tell you straight.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Selma and the surrounding communities since 1998.
Get Your Free Selma Home Addition Estimate
You’ve probably lived through at least one contractor who made promises he couldn’t keep. We don’t run our company that way. Tom Barrett puts his name, his address, and his license number on the line with every project. The scope comes in writing, the price changes come in writing, and the 90-Day Done Right Promise comes with every Selma job we finish. Call (877) 610-1318 today for your free estimate. A live person answers, not a voicemail box.