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 Saginaw
Adding square footage to a Saginaw home usually costs between $45,000 and $130,000, depending on whether you’re converting a garage, building a detached ADU, or adding a second story. Crews from Barrett & Sons Construction work in Saginaw weekly, and we know the 76131 housing stock well enough to spot foundation issues before they become framing problems. If you’re thinking about an addition or ADU on your Saginaw property, call (877) 610-1318 for a free estimate with real numbers, not ballpark guesses.
Saginaw’s homes weren’t built for a one-size-fits-all addition. Most of the houses here went up between 1990 and 2010, sit on post-tension concrete slabs, and rest on Blackland Prairie clay that swells and shrinks with every wet winter and dry summer. That matters more than most homeowners realize. A contractor who doesn’t account for slab movement will frame an addition that pulls away at the seam within five years. We’ve seen it happen. Our Home Additions & ADU team starts every Saginaw job by looking at drainage, slab condition, and the existing roofline before we ever talk framing.
Here’s what a Saginaw addition should include that a bargain bid often skips: a soils evaluation or at minimum a hard look at your foundation history, a written plan for tying the new slab into the existing post-tension grid, and a drainage correction if your lot feeds water toward the house. Skip any of those three and you’re paying for the same job twice.
Why Barrett & Sons Construction Is Saginaw’s Preferred Home Additions & ADU Company
Tom Barrett started this company in 1998 and still answers his own phone. That’s not marketing language. Call (877) 610-1318 and you’ll get a live person, not a voicemail tree. Saginaw homeowners tell us the same thing over and over: they got burned by an outfit that quoted one number on the phone and handed them a different bill when the crew showed up. Every price change on a Barrett & Sons job arrives as a written change order before work proceeds. The allowance that isn’t on paper is a surprise waiting for a date.
We carry a 90-Day Done Right Promise, written on every contract. If something isn’t right after we finish, one call brings Tom back. No arguing, no “that’s normal settling.” He lives in the metro, works Saginaw regularly, and you’ll see him at the hardware store. Ask anyone who’s hired us.
Permits? We pull them on every eligible job, and the inspector signs off before we call it done. The permit inspector works for you, not for me. That’s why I like him. A lot of Saginaw homeowners come to us after a previous contractor told them permits were optional. They’re not, and the liability for unpermitted work follows the house, not the builder.
Our crews are Tom’s sons and their teams. Background-checked, uniformed, and carrying the Barrett & Sons name on the truck. Not a franchise dispatching strangers from two counties away.
Our Home Additions & ADU Services in Saginaw
Every addition in Saginaw has to work with what’s already there: a slab foundation, a heavy clay soil, a roof built for North Texas heat and hail. Here’s how we approach each type of project.
ADU Design & Permitting
A detached ADU in Saginaw typically runs $90,000 to $220,000, and the design phase is where that number gets set. We handle concept through stamped drawings, and we submit to the city of Saginaw ourselves. Zoning in the 76131 zip code isn’t the same as Fort Worth, and setbacks vary by lot. We’ve shepherded enough ADU permits through Saginaw’s process to know exactly what the reviewers look for, especially on the post-tension slab details for the new foundation.
Garage Conversion ADU
Converting an attached garage ranges from $30,000 to $80,000 in Saginaw, and it’s the most common ADU route because the slab is already there. But here’s the Saginaw-specific catch: garage slabs are often poured thinner than house slabs and may not have the same post-tension cable grid. We evaluate what’s actually under the existing concrete before planning walls, plumbing, and egress. A garage conversion that cuts into cables or ignores drainage is a structural headache waiting to happen.
New Detached ADU
A standalone ADU gives you the most flexibility, whether it’s for an aging parent, adult children, or rental income. In Saginaw, site prep drives a lot of the cost because the clay soil needs proper compacted fill and drainage before a new slab can be poured anywhere on the property. Homes near the low-lying areas west of US-287 and toward the Eagle Mountain Lake drainage corridor regularly have runoff issues that have to be fixed as part of the build, not after the drywall goes up.
Junior ADU & Interior Conversion
A junior ADU typically means converting a bedroom, bonus room, or oversized garage into a self-contained living unit within the existing footprint. These projects in Saginaw usually land between $45,000 and $90,000 depending on whether you need a kitchenette, a separate entrance, or both. They’re fast and efficient because the structure already exists. What we watch for is the same as any ground-floor work here: slab condition, water drainage, and any history of door-frame shifting that signals soil movement.
If you’re already rethinking the existing footprint, we also handle Kitchen Remodeling in Saginaw and Bathroom Remodeling in Saginaw. An addition that opens into a dated kitchen or bathroom misses half the point, so we’re often doing both scopes under one roof.
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 Saginaw
When you’re spending north of $45,000 on an addition, the materials should be things you can look up. We install Schluter systems in any wet area of a new ADU or addition, GAF shingles on any new roofline we tie into, and Sterling fixtures in attached bathrooms. We don’t stock mystery brands off the back of a van. If a material is going into your Saginaw home with our name on it, you’ll know exactly what it is and where to find its warranty.
Common Home Additions & ADU Problems We See in Saginaw Homes
- Post-tension slab conflicts. Saginaw’s homes are almost all on post-tension concrete, and the cables run in a grid you can’t see. Any ground-floor addition or ADU requires locating those cables before any cutting or drilling.
- Clay soil movement at the connection point. The wet-dry cycle on Blackland Prairie clay means new slabs settle differently than the original foundation. We design the connection to flex, or the addition cracks at the seam.
- Drainage that funnels water under the existing slab. Especially west of US-287, lots in Saginaw often grade toward the house instead of away. An addition changes the roofline and runoff pattern, so we correct drainage as part of the build.
- Undersized electrical panels. Most 1990s and 2000s tract homes in Saginaw were built with 150-amp panels. Adding an ADU with its own mini-split, kitchenette, and water heater often requires a panel upgrade, and we plan for it before framing starts instead of discovering it at rough-in.
Pricing for Home Additions & ADU in Saginaw, TX
Here are real numbers for the Saginaw market, not national averages that mean nothing in north Tarrant County. A full home addition on a Saginaw slab runs $45,000 to $130,000. A detached ADU lands between $90,000 and $220,000. Garage conversions run $30,000 to $80,000, and a junior ADU or interior conversion typically costs $45,000 to $90,000. What moves the number on your specific lot: current slab condition, drainage corrections, whether you need a second story, and how far the addition ties into existing plumbing and electrical.
Fixed pricing means fixed. The estimate we give you is the price you pay, and if anything changes, it changes in writing before work moves. No surprise invoices at the end. Call (877) 610-1318 to schedule a free estimate, and we’ll walk the property with you and put numbers on paper.
We Also Serve Cities Near Saginaw
Our crews cover Saginaw and the surrounding communities, including Watauga, Haltom City, Eagle Mountain, and Keller. If you’re just outside Saginaw’s 76131 boundaries, we’re already working in your area. Our Home Additions & ADU in Saginaw service area extends across northwest Tarrant County, so don’t hesitate to call for a free estimate even if you’re a few miles out.
Serving Saginaw, TX - Our Local Coverage Area
We’re based in the Saginaw 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 Saginaw
A home addition in Saginaw typically costs $45,000 to $130,000, while a full detached ADU ranges from $90,000 to $220,000 and a garage conversion runs $30,000 to $80,000. Your specific price depends on slab condition, drainage needs, and whether the addition ties into existing systems or requires new runs. Call (877) 610-1318 for an exact quote. Estimates are free.
Yes, we work across the entire 76131 zip code, including homes near Saginaw Boulevard, the neighborhoods around Willow Creek Elementary, and the subdivisions that run west toward Eagle Mountain Lake. If you’re in Saginaw city limits or just outside, we’ll come out for a free walkthrough and a written scope.
Saginaw’s housing stock is almost entirely 1990s and 2000s tract homes on post-tension slabs over Blackland Prairie clay, which makes the connection between old foundation and new slab the single most important detail on any addition. Contractors who do most of their work in cities with older pier-and-beam stock or newer developments with different soil prep often underspec this connection. We design for Saginaw’s specific soil movement from day one.
Only if the scope changes, and any change arrives as a written change order before work proceeds. We don’t do verbal change orders, and we don’t surprise you at the end with charges you never approved. The price on your estimate is the price you pay unless something about the job itself changes and you sign off on it in writing.
Yes, we pull permits on every eligible job, and the inspector signs off before we call the job done. Unpermitted additions become a problem when you try to sell the house, and the liability follows the property. We won’t cut that corner, even if another bidder will. Call (877) 610-1318 to talk through what your project needs.
Talk to a Real Person in Saginaw
If you’ve been thinking about an addition or ADU on your Saginaw property, start with a conversation. No pressure, no high-pressure sales pitch. Tom Barrett has been doing this since 1998, and he’ll tell you straight what your lot can handle, what it’ll cost, and whether your project is even worth doing. Call (877) 610-1318 for a free estimate. We’ll answer the phone, come out to your property, and put everything in writing before any work begins.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Saginaw, TX since 1998.