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 Murphy
If you’re weighing a home addition or ADU in Murphy, the typical project lands between $45,000 and $130,000, and the most common question we hear from Maxwell Creek and Rolling Ridge homeowners is whether their slab can handle the added weight before the first wall goes up. We’ve been answering that question across Murphy for years, and the answer almost always starts with the soil under the house, not the lumber on top of it. Tom Barrett and his sons run the crews, and we answer our own phone. Call (877) 610-1318 and you’ll get a person, not a voicemail tree. We pull permits on every eligible job, we put every scope change in writing before work happens, and we live close enough that a follow-up visit is a short drive, not a corporate escalation.
Why Barrett & Sons Construction Is Murphy’s Preferred Home Additions & ADU Company
Murphy isn’t a town where you want a stranger walking your roof line or cutting into your slab. Tom Barrett’s name, address, and license number are published and verifiable; look him up before you sign anything. Our crew members are background-checked, uniformed, and most of them share Tom’s last name; when someone shows up at a home in Murphy, they carry the Barrett name on the truck and on their shirt. We’ve been fielding calls from Murphy homeowners since the master-planned neighborhoods off North Murphy Road and Betsy Lane were still filling in, and we know what the HOAs along FM 544 require before a permit gets pulled. The permit inspector works for you, not for me; that’s why I like him. And if something isn’t right, Tom comes back. It’s written on every contract as the 90-Day Done Right Promise.
Our Home Additions & ADU Services in Murphy
A lot of Murphy homeowners start with the idea of an ADU and end up deciding between a garage conversion and a detached build once they see the numbers side by side. Here’s what we actually do, and how each plays out in Murphy specifically.
ADU Design & Permitting
Before any concrete gets poured, the design has to clear two hurdles in Murphy: the city’s building review and, in most subdivisions, an HOA architectural committee that enforces exterior material and color rules. We handle both. We draw the plans, submit the package, meet the inspector on site, and keep you informed as it moves. An ADU in Murphy typically runs $90,000 to $220,000 depending on size, finish level, and whether utilities need to be trenched across the lot, and we’ll give you a written line-item scope before you commit to anything.
Garage Conversion ADU
Converting an attached or detached garage is usually the most cost-effective path to an ADU in Murphy, often landing between $30,000 and $80,000. It uses an existing foundation and roof, which saves real money, but it also means the slab has to be evaluated for plumbing rough-ins and insulation that most 2000s-era Murphy garages never got. Homes built by Centex, KB Home, and David Weekley in the early 2000s were not designed with future conversions in mind, so we’re almost always cutting into the slab to add a bathroom line and dealing with a grade that sits too low for comfortable living space.
New Detached ADU
A new detached ADU gives you a clean slate, and in Murphy it’s also the option most constrained by HOA setbacks and lot coverage rules. Many of the subdivisions built out between 2000 and 2015 left little rear yard to work with once pools and patios went in, so we spend a lot of time checking plat maps and setback lines before we ever draw a wall. A detached ADU with proper utilities, insulation, and finishes in Murphy generally falls between $90,000 and $220,000, and that range accounts for the slab work the Blackland Prairie clay demands. You don’t pour a pad on this soil without pier depth that reaches stable strata.
Junior ADU & Interior Conversion
For families who want aging parents close without a separate structure, a junior ADU inside the existing footprint is a smart fit. This often means converting a large bonus room, a formal dining room, or a downstairs study into a self-contained suite with its own entrance, kitchenette, and bath. In Murphy, where most of the housing stock is two-story brick veneer on slab, interior conversions avoid the site constraints entirely and usually run $45,000 to $130,000 depending on how much plumbing and egress work is required.
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 Murphy
We specify materials you can look up, not mystery brands off a van. For window and door packages on Murphy additions and ADUs, we regularly install Simonton, Ply Gem, and PGT products, and we can order locally so lead times don’t idle your project. If you’re adding a sunroom, enclosed patio, or second-story space, the glazing choice matters in a North Texas climate that swings from triple-digit summers to freeze warnings, and we’ll quote you a named product with a written warranty before you buy. When your project overlaps with the kitchen or bath inside the addition, our Kitchen Remodeling in Murphy team and Bathroom Remodeling in Murphy crew work the same schedule with the same change-order discipline, so nothing slips between trades.
Common Home Additions & ADU Problems We See in Murphy Homes
Murphy’s housing stock is unusually uniform, and that means the problems repeat. Here’s what we find most often when we open up a wall or probe a slab.
– Slab movement from Blackland Prairie clay. Murphy sits on expansive montmorillonite clay that shrinks in summer drought and heaves in wet winters. That repeated movement cracks brick veneer, interior drywall, and door frames, and any addition or ADU has to be framed and tied in with that movement accounted for, or the new work will separate from the old within a few seasons.
– Original builder-grade wiring and plumbing at end of life. The vast majority of Murphy’s homes went up in a single 15-year window, mostly between 2000 and 2015. That means electrical panels, water heaters, and supply lines are all hitting their 10 to 25 year failure point at the same time, often while the addition is already underway.
– HOA review delays that catch homeowners off guard. Murphy’s master-planned communities enforce exterior material and color covenants, and an unanticipated architectural review can stall a project for weeks. We front-load that approval so the permit and the HOA letter move in parallel, not in sequence.
– Phase-wide construction defects that repeat house to house. Because entire subdivisions were built by the same volume builder with the same crews and materials, a framing or flashing issue we fix on one street in Rolling Ridge often shows up identically three streets over near Miller Road. That local pattern knowledge saves Murphy homeowners real diagnostic time.
Pricing for Home Additions & ADU in Murphy, TX
We Also Serve Cities Near Murphy
Our Home Additions & ADU team works throughout the east Collin County corridor. If you’re in Sachse, Wylie, Lucas, or Plano, we can handle the same scope, the same written change-order discipline, and the same permit process. For a full look at how we serve this specific market, visit our Murphy page or call us directly. One phone number, answered by a live person.
Serving Murphy, TX - Our Local Coverage Area
We’re based in the Murphy area and know this community well, providing Murphy Roofing and more. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Home Additions & ADU in Murphy
How fast can you respond to a Murphy home addition or ADU project?
We typically schedule an in-person estimate in Murphy within a few business days, and we answer the phone live when you call. Call (877) 610-1318 to schedule a free estimate, and we’ll give you a written line-item scope after the site walk.
Do you work in my Murphy neighborhood?
We serve the entire 75094 area, including Maxwell Creek, Rolling Ridge, Creek Hollow, and the subdivisions off North Murphy Road, Betsy Lane, and FM 544. If you’re inside Murphy city limits, we’re already familiar with your HOA’s architectural review process and the soils under your slab.
Do you offer emergency service for structural issues in Murphy?
For dangerous conditions like a shifting addition wall, failing beam, or water intrusion around a new tie-in, we’ll get someone out to assess quickly and safely. Call (877) 610-1318 any time; a live person answers. We’ll tell you honestly whether it needs immediate attention or can wait for a planned repair.
How does the cost of an ADU in Murphy compare to nearby cities?
Murphy’s ADU pricing is similar to Sachse and Wylie, generally $90,000 to $220,000 for a detached build, with little meaningful difference in labor rates. What does vary is the HOA review layer, which can add time if it hasn’t been anticipated, and the slab conditions on your specific lot. Call (877) 610-1318 for an exact quote; estimates are free.
Is the workmanship warranty valid in Murphy?
Yes. Every job we complete in Murphy carries the 90-Day Done Right Promise, and it’s written on the contract itself. If it’s not done right, Tom comes back and makes it right, one call.
Contact Us for Home Additions & ADU in Murphy
If you’re ready to talk about an ADU design, a garage conversion, or a full room addition in Murphy, call (877) 610-1318. We’ll set a free estimate, walk the property with you, and put the numbers in writing before you commit. Tom Barrett answers the phone with his own name, and the crew that shows up carries it too.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Murphy, TX and the surrounding communities since 1998.