A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable Home Addition Contractor Across Murphy
A home addition in Murphy typically runs $145,000 to $210,000 for a second-story build, and $98,000 to $155,000 for an attached garage or room addition, once permits, inspections, and Murphy’s expansive-clay foundation requirements are factored in. Most mid-size projects take 14 to 20 weeks from the first geotechnical report to final inspection. If you’re weighing whether to add on or move, the answer usually comes down to what your lot will actually support and what the city will sign off on. Call (361) 204-4652 and we’ll walk your property, check the slab and setback lines, and give you a written price before anything gets framed.
Why Lodgewick ADU Dallas Is Murphy’s Preferred Home Addition Contractor Company
Murphy homeowners call us because we show up with a written price, a defined arrival window, and a crew that leaves the site cleaner than they found it. That’s the Kingswell Way, and it’s been the standard since 2010. Russ Delmar runs our operation, and he’s the person who answers the phone when you have a question about your build mid-project. No voicemail loops. No “we’ll get back to you.”
Local reputation in Murphy matters more than a billboard. We’ve worked on homes along Betsy Lane, near Murphy Central Park, and in the Maxwell Creek corridor, and the feedback we hear most is that we said what the job would cost and then held to it. The 365-Day Done Right Promise backs that up in writing on every project. If something isn’t right within a year of completion, we come back and make it right at no charge. That’s not a sales line. It’s in the contract.
Our familiarity with Murphy’s building department sequence, from the pre-construction erosion check on corner lots near creek buffers to the pre-drywall inspection, means fewer surprises in your calendar. We’re not a Dallas contractor driving east and guessing at local rules. We coordinate permits through Murphy’s specific process, and our crews know which inspectors want which details on which day.
Second Story Addition Contractor in Murphy
A second story addition in Murphy is the right move when your lot is too tight to build out but your foundation can carry the load, after a geotechnical report confirms the clay under your slab will support the added weight. This is not a one-size-fits-all project. Murphy’s Eastern Cross Timbers soil swells and shrinks with rain and drought, so the engineering step matters more here than in Plano or Richardson. We bring in a soil engineer before we draw anything, because the wrong pier depth turns a $180,000 second-story plan into a $250,000 problem.
Foundation and Framing Reality
On a recent Murphy job off Betsy Lane, our crew had to pier the slab edges down to undisturbed clay before framing could start, because soil heave in that pocket had shifted a neighbor’s shed a full inch out of plumb. That’s the kind of detail a Dallas-based bid misses. We’d rather spend $4,000 on piers upfront than $30,000 on foundation repair after the drywall goes up.
Electrical and HVAC Load
Older Murphy homes on 100-amp panels frequently can’t carry a second-story heat pump without a new service entrance. If we’re adding 900 square feet of conditioned space upstairs, that’s a $4,500 to $7,000 electrical upgrade, depending on whether Murphy requires a new mast or just a panel swap. We flag this in the written estimate, not after the walls are open.
Garage Addition Contractors in Murphy
Garage addition contractors in Murphy build either attached garages on existing homes that never had one, or convert and expand garage space into livable square footage. The cost swings based on whether you’re adding a simple two-car bay at $45,000 to $65,000, or doing a full garage-to-ADU conversion with insulation, plumbing, and a separate entrance at $120,000 to $160,000. Murphy’s setback rules and creek-buffer erosion checks on corner lots add calendar time that a lot of contractors don’t mention until the job is already scheduled.
Slab Work on Murphy Clay
Any attached garage addition in Murphy means pouring new concrete next to an existing slab on expansive clay. The new slab has to be isolated from the old one with a proper expansion joint and its own perimeter piers, or you’ll get differential movement that cracks the joint and opens a water path. We’ve seen $20,000 garage additions where the contractor skipped piers and the door stopped opening within two years. We don’t skip that step.
Garage-to-ADU Scope
A garage conversion in Murphy follows the same city process as any accessory dwelling unit: plans, permit, pre-drywall inspection, final inspection. We run the new subpanel and mini-split lines before the city inspector walks it, because Murphy’s pre-drywall check looks at exactly that. James Hardie plank and trim keep the exterior matching the main house, which the city will look at during the final.
Trusted Brands We Service in Murphy
We work with established ADU brands and materials that hold up in Murphy’s heat and clay conditions. James Hardie plank and trim stand up to the freeze-thaw and summer expansion better than vinyl. Tuff Shed frames work well for detached studio additions when the budget needs to stay tight. Plant Prefab panels are a good match for homeowners who want a faster enclosed shell without waiting on stick-framing weather windows. We keep local inventory relationships in the metro so Murphy customers aren’t waiting on backordered siding or trim packs. When your build starts, the materials are already staged or in transit.
Common Home Addition Contractor Problems We See in Murphy Homes
- Bidding on Plano foundation assumptions. Murphy sits on the Eastern Cross Timbers ecotone, and the clay here swells more aggressively than what you’d see two cities west. A contractor who skips the geotechnical report absorbs piering costs mid-job, and that’s usually when the price starts moving and the homeowner gets a change order with a smile.
- Corner-lot erosion control surprises. Murphy enforces a pre-construction tree and erosion-control check on properties near creek buffers and drainage corridors. Miss that, and the permit clock stops for two to three weeks while you scramble for a tree survey and silt fencing plan.
- Undersized electrical service on second-story additions. A 100-amp panel from a 1990s build won’t run a new heat pump, a second water heater, and the existing load. We’ve seen framing open and then everything stop for a $6,000 service upgrade that should have been in the original bid.
- Garage additions poured without isolation joints. New concrete poured tight against an old slab on Murphy clay will crack at the joint. The door binds, water gets in, and the fix costs more than the original pour. This is a Murphy-specific failure mode, and it’s entirely preventable.
Pricing for Home Addition Contractor in Murphy, TX
Here are the numbers we give homeowners in Murphy before any contract is signed. A second-story addition runs $165,000 to $210,000 for 800 to 1,200 square feet, including piering, framing, electrical upgrade, HVAC extension, and finishes. An attached room addition runs $98,000 to $140,000 depending on whether you’re adding a bathroom or just living space. A garage addition runs $45,000 to $65,000 for a two-car bay. A garage-to-ADU conversion runs $120,000 to $160,000. A sunroom addition runs $55,000 to $85,000. A bump-out addition runs $50,000 to $80,000. These are real ranges for Murphy’s permit, inspection, and soil conditions, not Dallas marketing numbers. Call (361) 204-4652 and we’ll give you a written line-item price for your specific lot. The estimate is free, and the number we give you is the number we build to.
We Also Serve Cities Near Murphy
While this page focuses on Murphy, our Home Addition Contractor team works throughout the northeast metro. We regularly build in Dallas, Plano, Garland, and Richardson, and the same written-price, written-guarantee approach applies everywhere we work. The soil and permit realities change from city to city, which is exactly why you want a contractor who knows Murphy specifically rather than one who treats every suburb the same. If you’re a few exits away, ask us about your city’s inspection sequence when you call.
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 About Home Addition Contractor in Murphy
Yes. Murphy’s building department requires a geotechnical report for any second-story or attached addition, and the report has to come from a licensed Texas geotechnical engineer. That’s because the city sits on the Eastern Cross Timbers ecotone, where expansive clay shifts with moisture and the wrong foundation design turns into a structural problem. You should budget $2,500 to $4,500 for the soil test and engineering letter, and expect it to add 10 to 14 days to your pre-permit calendar. Call (361) 204-4652 and we’ll order the report for you as part of the estimate.
Plan on 10 to 14 weeks for a standard garage-to-ADU conversion in Murphy, assuming no change orders and no weather delays. The sequence is: demolition and slab prep, framing and roof tie-in, rough-in for electrical and plumbing, the pre-drywall inspection, insulation and drywall, then finishes and the final inspection. Murphy’s pre-drywall check is the gate that stops bad work, and we always schedule it before the walls close. If you want an exact calendar for your garage, call (361) 204-4652 and we’ll map it out with the current inspector schedule.
In Murphy, the two honest price-movers are soil surprises and electrical service upgrades that weren’t scoped upfront. If the geotechnical report wasn’t done properly, you’ll hit unstable clay and the pier depth changes mid-foundation, adding $4,000 to $12,000. If your panel is 100 amps and the plan didn’t include a service upgrade, that’s $4,500 to $7,000 more. We write both into the first estimate, which is why our price stays where we put it. The 365-Day Done Right Promise also covers any work we do that fails within the year. Call (361) 204-4652 for a written price that accounts for Murphy’s soil and panel realities from day one.
Yes, and this is one of the ways Murphy differs from cities with less aggressive clay. The inspector will want to see the geotechnical report and the pier schedule, and they’ll compare the new foundation design to what’s under the original structure. If the addition’s slab isn’t isolated properly or the piers don’t match the soil report, you won’t pass the pre-pour inspection. We’ve had inspectors ask for the engineer’s stamp on site, which is why we carry the full report to every foundation inspection. Call (361) 204-4652 and we’ll show you exactly what the inspector will look at on your lot.
Yes, but it costs more than doing it in one continuous build. You can phase it as foundation and framing first, then a separate permit for the interior finishes later, but each phase means a new permit fee, a new inspection calendar, and a new mobilization. Murphy will allow it, and for some homeowners it makes the budget work, but you’ll spend an extra $8,000 to $15,000 in duplicated fees and time. Most people are better off building the whole thing at once and letting the written price carry the load. Call (361) 204-4652 and we’ll price both options so you can decide with real numbers.
Written by Russ Delmar, Owner at Lodgewick ADU Dallas, serving Murphy and the northeast metro. Call (361) 204-4652 for a free written estimate.
