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
A ground-up home addition in Murphy typically runs $45,000 to $130,000, while a detached ADU falls between $90,000 and $220,000. The biggest scheduling variable isn’t framing or drywall – it’s your HOA’s architectural review committee, which can add two to four weeks before the city even sees a permit application. At Barrett & Sons, we’ve been building additions and ADUs across Murphy long enough to know exactly what those committees look for, and we file a complete submittal packet the first time so your project doesn’t sit in queue while subs are already mobilized.
Tom Barrett founded this company in 1998, and Home Additions & ADU work has been part of what we do since the beginning. If you’re thinking about adding square footage, converting a garage, or building a detached ADU behind your existing home, call (877) 610-1318. We’ll walk your property, look at your HOA’s guidelines, and give you a written estimate with real numbers.
Why Barrett & Sons Construction Is Murphy’s Preferred Home Additions & ADU Company
We’re not a franchise dispatching strangers to Murphy. Tom Barrett’s sons run the crews, and Tom himself is on-site for most of the work we do in 75094. That matters when you’re spending six figures on an addition – you want to know the name on the truck matches the person accountable for the work.
Murphy’s housing stock is almost entirely brick-veneer single-family homes on concrete slabs, built by volume builders like Centex and David Weekley during the 2000s and early 2010s buildout. We know those floor plans, those brick blends, and those foundation behaviors. When a homeowner off North Murphy Road calls about a garage conversion, we can usually tell them before we arrive whether their slab has the vapor barrier needed to keep moisture out of new flooring. That’s the kind of local knowledge you only get from doing the work here year after year.
Every price change on a Murphy project arrives as a written change order before work happens. Every permit gets pulled. Every inspection gets signed. And every job carries our written 90-Day Done Right Promise – if something isn’t right, Tom comes back and fixes it. One call.
We also publish Tom’s name, address, and license number. Look us up before you sign anything. We want you to.
Our Home Additions & ADU Services in Murphy
ADU Design & Permitting
Building an ADU in Murphy means navigating two approval layers: your HOA’s architectural review and the city’s permitting process. We handle both. Our submittal packet includes the exact brick blend, fascia color, roof pitch, and window mullion pattern your HOA committee will compare against the original builder’s elevation drawings. That’s how we get approvals on first review instead of getting tabled. Missing even one of those pieces can cost you weeks.
Garage Conversion ADU
A garage conversion in Murphy runs $30,000 to $80,000 depending on whether you’re adding a bathroom, kitchenette, or separate entrance. The first thing we check is the existing slab. Murphy sits on Blackland Prairie clay, and if your garage slab doesn’t have a proper vapor barrier, the first cold snap brings moisture up through the concrete and ruins new flooring before inspection sign-off. We verify that before we frame a single wall.
New Detached ADU
A detached ADU on your Murphy lot falls between $90,000 and $220,000. Foundation design is critical here. The expansive clay under Murphy homes shrinks in summer drought and heaves in wet winters, so we spec perimeter beams deeper than the standard four-inch slab. We’ve watched too many detached additions crack at the interface with the original house within two wet-dry cycles. Ours don’t.
Junior ADU & Interior Conversion
A junior ADU – typically a converted bedroom, bonus room, or finished attic space with a kitchenette and separate entrance – is the most affordable way to add a rental unit or multigenerational living space in Murphy. Because these conversions touch plumbing and electrical inside existing walls, you’ll need permits pulled and inspections signed. We file everything, including the HOA packet if your project touches the exterior.
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 Murphy
We install windows and doors from Simonton, Ply Gem, and PGT – brands you can look up, not mystery stock off a van. When a Murphy addition calls for new windows, Simonton’s vinyl lines handle the Collin County heat well, and PGT’s impact-rated options make sense if you want storm protection without sacrificing the exterior look your HOA will approve. We order directly and schedule delivery around your architectural review timeline so materials aren’t sitting in a driveway waiting on a committee.
Common Home Additions & ADU Problems We See in Murphy Homes
- HOA submittal packets missing elevation drawings or material samples. Committees in Murphy’s master-planned communities table incomplete applications, and your project sits in queue while you’re already paying for subs who can’t work. We file complete packets the first time.
- Standard four-inch slabs poured on Blackland Prairie clay. Murphy’s expansive montmorillonite clay heaves and shrinks with every wet-dry cycle. A ground-floor addition without deeper perimeter beams will crack at the interface with the original house within two seasons.
- Garage conversions started without a vapor barrier check. Many Murphy garages were built as unconditioned spaces. If the slab lacks a proper moisture barrier, new flooring fails before final inspection. We document this before we start.
- Exterior material choices that violate HOA covenants. Murphy’s HOAs enforce specific brick blends, fascia colors, and window mullion patterns. Choosing the wrong finish means redoing work or paying fines. We pull the original builder elevation drawings before we submit.
Pricing for Home Additions & ADU in Murphy, TX
Here’s what people in Murphy actually pay, based on the work we’ve priced and built across 75094. Home additions run $45,000 to $130,000. Detached ADUs run $90,000 to $220,000. Garage conversions run $30,000 to $80,000.
| Project Type | Typical Range in Murphy |
|---|---|
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
| Garage Conversion | $30,000 – $80,000 |
What moves the number: foundation depth (Murphy’s clay soils may require deeper perimeter beams), HOA-required exterior materials, whether you’re adding a bathroom or kitchen, and the condition of your existing slab. We give you a written line-item quote before work starts, and every change arrives as a written change order. No surprises at the end. Call (877) 610-1318 to schedule a free estimate.
We Also Serve Cities Near Murphy
Barrett & Sons builds additions and ADUs throughout the northeast Dallas-Fort Worth area, including Home Additions & ADU in Murphy, Sachse, Wylie, Lucas, and Plano. If you’re just outside Murphy’s city limits, we still serve your neighborhood – the HOA rules and clay soils don’t stop at the city line, and neither do we.
Serving Murphy, TX - Our Local Coverage Area
We’re based in the Murphy 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 Murphy
Most Murphy HOA architectural committees take two to four weeks to review a complete submittal, so you’re looking at roughly a month added to your timeline before the city permit process even begins. That’s why we file the full packet – elevations, material samples, site plan, brick blend, fascia color, window mullion pattern – upfront. Incomplete packets get tabled, and a tabled application can add another two to three weeks while the committee waits for missing pieces. We schedule demolition and framing around the approval so you’re not paying subs to stand around. Call (877) 610-1318 and we’ll map your specific HOA’s timeline.
Yes, in most Murphy subdivisions you can add a detached ADU even if your lot is fully fenced and landscaped, but your HOA will review the exterior materials, height, and setbacks against the community’s covenants. Some Murphy HOAs restrict detached structures to match the primary dwelling’s brick blend and roof pitch. We check your specific HOA’s design guidelines before you spend a dollar on plans, and we file the application for you. For a free consultation on whether your lot works, call (877) 610-1318.
Murphy sits on the Blackland Prairie, where expansive montmorillonite clay shrinks dramatically in hot, dry summers and heaves back during wet winters, and that movement puts stress on every slab and perimeter beam in your home. When you add a room or convert a garage, the new foundation meets the old one at an interface, and if the new slab isn’t designed for the same movement, it cracks there. We document existing slab conditions and spec foundation depth for Murphy’s soils before we pour. It’s not optional here.
Yes, most Murphy HOAs have written covenants that restrict exterior colors, materials, roof pitch, and even window mullion patterns. The committees typically compare your submittal against the original builder’s elevation drawings for your subdivision – if your brick blend doesn’t match the Centex or David Weekley original, you’ll be asked to revise. We pull those original elevations as part of our pre-submittal work so your packet matches on first review. Call (877) 610-1318 and we’ll review your HOA’s guidelines before you commit.
Barrett & Sons files both. We submit the complete architectural review packet to your HOA, track it through committee, and then file the city permit once HOA approval is in hand. Tom Barrett’s name, address, and license number are on every document, and the permit inspector works for you, not for us – that’s why we like having him on every job. Permits pulled and inspections signed on every eligible project, no exceptions.
If you’re planning a home addition or ADU in Murphy, the sooner we see your property and your HOA’s guidelines, the sooner you’ll have real numbers. Call (877) 610-1318 to schedule your free estimate. Tom and his sons handle the rest.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Murphy and surrounding communities since 1998.