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 Briar
A home addition in Briar typically runs $45,000 to $130,000, while a detached ADU built from the ground up lands between $90,000 and $220,000. Those are real numbers pulled from the work we’ve done across ZIP 76071, not a national average that ignores what Briar lots actually look like. If you’re weighing a room addition, a garage conversion, or a new ADU out by Eagle Mountain Lake, call Tom Barrett and his sons at (877) 610-1318. We’ll walk your property, check which county governs your parcel, and put a fixed price in writing before anything gets ordered.
Why Barrett & Sons Construction Is Briar’s Preferred Home Additions & ADU Company
We’ve been building in the Cross Timbers since 1998, and we know the single biggest headache Briar homeowners face before a hammer ever swings: figuring out whether their lot answers to Parker County or Tarrant County. Most national outfits don’t know Briar is unincorporated at all. They’ll quote you over the phone, then discover the permitting snag after your foundation is dug. We start with the parcel. Tom Barrett publishes his name, his address, and his license number, and his sons run the crews you’ll see on your property.
Briar customers call us because the quote they sign is the price they pay. Every allowance, every material selection, every change order arrives in writing before work proceeds. No surprise invoice at the end. And every home addition and ADU we build in Briar carries our 90-Day Done Right Promise: if something isn’t right, one call brings Tom back. That’s the kind of guarantee that matters when you’re writing a six-figure check.
We answer the phone live, 24 hours a day. When you call about a Home Additions & ADU project in Briar, you won’t get a voicemail box or an out-of-state call center. You’ll get someone who knows the difference between a Parker County septic setback and a Tarrant County one.
Our Home Additions & ADU Services in Briar
ADU Design & Permitting
Build a detached dwelling on a Briar lot with a private well and septic system, and the county environmental health office gets a vote on your floor plan. Setback rules from the drainfield routinely decide where the ADU can sit and how big it can be. We handle that coordination from day one: parcel research, county filing, septic reserve capacity review, and full plan sets. We’ve seen the wrong-county permit filing cost Briar homeowners two weeks of standing still. We don’t let that happen.
New Detached ADU
A ground-up ADU in Briar runs $90,000 to $220,000 depending on square footage, finish level, and site work. Briar’s Vertisol clay expands and shrinks with every wet spring and dry August, so slab design matters more than most people expect. We specify foundation work that accounts for the soil movement cycles that crack flatwork and shift load-bearing walls across Parker and Tarrant Counties. You pick the finishes. We lock the price and the lead times in writing before we order.
Garage Conversion ADU
Converting an existing garage in Briar is the most cost-effective way to add living space: $30,000 to $80,000 for a completed unit. The conditions on the ground dictate a lot. Older agricultural-era garages around 76071 often have minimal insulation and outdated electrical panels, so we inspect first and price honestly. If your garage sits within a septic setback, that changes the design. We figure that out before rough-in, not after drywall.
Junior ADU & Interior Conversion
A Junior ADU tucks a separate living space inside your existing home, which can sidestep some of the site constraints that complicate detached units on well-and-septic lots in Briar. Think a private entrance, a kitchenette, and a full bath carved out of existing square footage. It’s a smart option for homeowners near Eagle Mountain Lake who want rental income or a space for aging parents without adding a new foundation. We’ll tell you honestly whether a JADU or a detached unit fits your parcel better.
What happens when you call
- 1
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 Briar
We specify materials you can look up. When we build a Briar addition, you’ll see names like KraftMaid cabinetry, Cambria quartz, and Andersen windows on the scope of work, not mystery brands off a van. For hardscapes around your new ADU, we work with Techo-Bloc and Belgard pavers. If a product we’ve installed in a Briar home needs attention under warranty, we coordinate the claim and handle the fix. We don’t vanish after final inspection.
Common Home Additions & ADU Problems We See in Briar Homes
- The wrong-county permit filing. The same two-lot street in 76071 can split between Parker County and Tarrant County. File under the wrong one and you’re looking at a two-week reset after rough-in inspection gets scheduled. We verify jurisdiction before we draw plans.
- Slab movement at the transition joint. Briar’s expansive clay soil shrinks during long summer droughts and swells when the rains come. Without a proper soil-movement analysis, the joint between an existing slab and a new addition will crack. We design footings for the Cross Timbers, not for generic north Texas.
- Septic reserve surprises. An ADU adds bedrooms and bathrooms, which adds load to the septic system. If nobody checks the drainfield’s reserve capacity before concrete goes down, you can face a $15,000 engineered expansion after the fact. We pull the environmental health records first.
- Electrical panels from the wrong era. Many older Briar homes carry agricultural-era panels that aren’t sized for an addition’s load. A second-story addition or a full ADU can mean a service upgrade. We catch it during design, not during the final electrical inspection.
Pricing for Home Additions & ADU in Briar, TX
Here’s the straight answer for Briar, TX: a room addition lands between $45,000 and $130,000. A new detached ADU runs $90,000 to $220,000. A garage conversion ADU comes in at $30,000 to $80,000. What moves the number is square footage, finish level, site prep, and which county’s inspectors sign off. The lead times on premium materials set the calendar far more than our labor does, and we price every long-lead item in writing before we order. Call (877) 610-1318 for a free estimate and a line-by-line scope in writing.
| Project Type | Briar Price Range |
|---|---|
| Home Addition | $45,000-$130,000 |
| ADU Construction | $90,000-$220,000 |
| Garage Conversion ADU | $30,000-$80,000 |
We Also Serve Cities Near Briar
If you’re outside 76071 but still nearby, we handle home additions and ADUs in Briar‘s neighboring communities too: Eagle Mountain, Azle, Saginaw, and Keller. Azle is incorporated, which means its own building department and its own rulebook. But the permitting and septic realities of Briar follow us everywhere we work. Call (877) 610-1318 and we’ll meet you on your lot.
Serving Briar, TX - Our Local Coverage Area
We’re based in the Briar 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 Briar
Your parcel’s county is determined by its legal lot of record, not by which side of the road you’re on. Briar straddles the Parker/Tarrant county line within 76071, and two lots on the same street can fall under different regimes. Call us at (877) 610-1318 with your address, and we’ll verify the jurisdiction before any plans are drawn. That check takes a day and saves weeks.
Because custom cabinetry, architectural glass, and specialty finishes are made to order, and their factory lead times set the schedule. KraftMaid cabinetry and Cambria quartz don’t ship overnight. We lock all lead times into a fixed-price scope of work before ordering materials. The only remaining variable is the county’s inspection queue. Call (877) 610-1318 for a free estimate with realistic timelines.
Yes, it should. Briar sits on expansive Vertisol clay that shrinks and swells through drought and rain cycles, and adding a second story changes the load on that soil. We specify an engineered assessment and foundation design that accounts for the movement. Skipping it is how transition joints crack between old slab and new subfloor. We don’t skip it.
Usually yes, but the septic system’s reserve capacity and setback lines will dictate where the ADU sits and sometimes how big it can be. Most Briar parcels rely on private wells and on-site septic. We pull the environmental health records before design so you know the constraints up front. Call (877) 610-1318 and we’ll walk your site.
It covers the scope of work, every allowance, every material selection, and every change order before work proceeds. It’s the difference between a fixed-price job and a surprise invoice at the end. Tom Barrett puts it on paper. If a scope change comes up mid-job, you get a written change order before a nail moves. Call (877) 610-1318 for an estimate you can hold us to.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Briar since 1998.