A fixed-price addition project from our Plano-based DFW team serving McKinney homeowners, with designers, project leads, and tradespeople who finish on the day they said they would. Eleven years, one promise: your quote is your price.
Comparing McKinney remodelers? See our honest side-by-side of the top 10 home remodeling contractors in McKinney — review counts with platform and date, permit timelines, and real project costs.
Most home additions in McKinney run $120,000 to $400,000, with larger second-story or multi-room expansions reaching the upper end. A primary-suite or single-room bump-out typically sits lower in that range, while a full second story or attached in-law suite on a Stonebridge Ranch or Craig Ranch home pushes higher. UHS quotes a fixed price up front, so the number you approve is the number you pay. Permits and inspections run through the City of McKinney Building Inspections department, part of Development Services, with applications submitted via the city’s online self-service portal. The biggest local cost driver is which McKinney home you are expanding: additions to 1990s-2010s master-planned homes carry HOA architectural-review requirements, while expanding an 1890s-era Historic Downtown home adds cost for matching period rooflines, siding and porch details, and for upgrading the older structure to current code where the new and old framing meet. For a line-item look at where the money goes, see our DFW remodel cost guide.
We handle survey, setbacks, engineering, HOA and permits before demolition. If your lot cannot take the footprint, you will hear it at the first walkthrough.
Fixed scope and a written schedule before anyone breaks ground in your yard.
Adding square footage in McKinney means working with two very different kinds of homes, and a home addition has to respect both. In the master-planned communities that fill most of the city, Stonebridge Ranch, Craig Ranch, Trinity Falls and Tucker Hill, the 1990s-and-newer houses are now hitting their first major expansion cycle: families want a primary-suite addition, a bigger kitchen footprint, or a second story rather than leaving for a larger home. In the Historic Downtown McKinney district, the second-largest historic district in Texas, with 1890s Victorian and Craftsman homes near the National Historic Landmark square, an addition is a more delicate job of matching original rooflines, porches and trim. UHS Remodeling has built additions across Collin County since 2014, with fixed pricing, a 1-year workmanship warranty, and a deep DFW track record behind every McKinney build.
We build home additions across McKinney, including Willow Bend, Legacy West, Deerfield, Hunters Glen, Russell Creek, and West McKinney Estates.
Site walk, scope (bedroom, master wing, second story), zoning + setback review, budget alignment.
Architectural drawings, structural engineer review, exterior match planning, MEP routing.
City of McKinney plan review, HOA architectural committee, energy code compliance. Average 3-5 weeks.
Foundation, framing, roof tie-in, MEP rough-in, insulation, drywall, finish-out. 12-22 weeks per scope.
Final inspection, punch list, certificate of occupancy filing, 1-year warranty active.
New slab and framing tied into the existing structure.
Matched brick and tinted mortar at the old-to-new seam.
Design and structural engineering run first, and city plan review plus the HOA architectural committee average three to five weeks before anyone breaks ground.
“An addition in McKinney is half permits, half craft. We pre-meet with the city’s plan review before drawings are stamped — that’s why our additions break ground 6 weeks after contract, not 14.”
From our Plano home addition case study — engineering, permits and the brick match. View all →
Which one is right depends on your lot line, your slab and your roof — not on a catalog.
Renderings from our design studies — the finished McKinney projects are above.
Ranges include foundation, framing, roof, systems and finishes — everything but landscaping.
All ranges include architectural drawings, engineering, materials, labor, permits, foundation, framing, MEP, finishes, and 1-year warranty. Sourced against NARI Cost vs. Value 2025 and your city building code requirements.
Single-room addition (250-450 sqft): bedroom, office, sunroom. Exterior match, standard finishes, full MEP.
Master wing or large family room (450-800 sqft): primary suite + bath, formal dining add-on, or great room expansion.
Second story or full custom (800+ sqft): structural foundation work, full second floor, matched exterior, custom millwork.
Additions live or die on setbacks, easements and lot coverage — and every DFW city writes those rules differently. We have permitted additions across McKinney and the neighboring cities, which means we can tell you in one visit whether the footprint you want is legal on your lot.
We deliver home addition across the northern DFW suburbs. See our home addition in Frisco, Allen, and McKinney.
Daniel B. on a DFW job site.
Your construction lead, Daniel B., runs your addition from framing to final inspection.
Sourced from NARI Cost vs. Value 2025, Texas Real Estate Commission, International Code Council, and 11 years of fielding the same calls in McKinney. Looking for ballpark numbers? Try our cost calculator.
Most McKinney home additions fall between $120,000 and $400,000, with full second-story additions and large multi-room expansions reaching the top of that range and single-room or bump-out additions sitting lower. UHS Remodeling gives you a fixed price before work starts, so the figure you approve is what you pay, with a 1-year workmanship warranty included.
Yes. A home addition is permitted and inspected through the City of McKinney Building Inspections department (Development Services) via the city’s online self-service portal. If your home is in a master-planned community like Stonebridge Ranch, Craig Ranch or Trinity Falls, you will also typically need HOA architectural-review approval before construction begins. UHS manages the permitting process as part of the project.
Yes. McKinney’s Historic Downtown district is the second-largest historic district in Texas, with 1890s-era Victorian and Craftsman homes, so additions there focus on matching original rooflines, siding, porches and trim while bringing the structure up to current code. UHS has built additions across McKinney and Collin County since 2014 and scopes each historic-home project to preserve period character.
A home addition in McKinney typically ranges from $120,000 to $400,000, depending on size, foundation, and whether it is single- or multi-story.
Most home additions in McKinney take 12-24 weeks from permits to completion. Room additions average 12-16 weeks. Second-story additions run 18-24 weeks. The permitting phase adds 3-6 weeks before construction begins.
In most cases, adding onto your McKinney home is cheaper than selling and buying larger. Real estate commissions, closing costs, moving expenses, and higher mortgage rates often exceed $80,000-$120,000. A home addition provides the space you need while keeping your current rate and neighborhood.
Yes. The City of McKinney requires building permits for all home additions including foundation, framing, electrical, plumbing, and HVAC. HOA approval may also be required. UHS Remodeling handles the entire permitting process.
Second-story additions in McKinney cost $150,000-$300,000+ depending on square footage and scope. The higher cost reflects structural engineering to reinforce the existing foundation, new staircase construction, and vertical extension of all mechanical systems.
A well-designed home addition typically recoups 50-70% of its cost in immediate property value. Additions that increase bedroom and bathroom count produce the highest ROI by moving the home into a higher comparable sales bracket.
No. Any permanent room addition in McKinney requires a foundation per building code. Most additions use a concrete slab, often post-tensioned for the area’s expansive clay soils. The only exception is a garage conversion using the existing slab.
Yes. We manage the entire design and engineering process through our network of licensed architects and structural engineers. All plans are stamped by a licensed Texas engineer and submitted directly to the City of McKinney for permitting.
Many McKinney neighborhoods require HOA architectural review before exterior modifications. We prepare the HOA submission package and coordinate directly with the architectural review committee to minimize delays.
Call (469) 850-7087 or schedule a consultation online. We visit your McKinney home, evaluate the structure, review lot requirements, and provide a detailed written proposal – completely free with no obligation.
North Texas sits on highly expansive clay soil that swells during wet months and shrinks during summer droughts, which can shift foundations by several inches over seasonal cycles. That is why every room addition we build in McKinney and Frisco starts with a foundation plan designed by a licensed structural engineer for the specific soil conditions of the lot. Typical solutions include steel-reinforced slab foundations and concrete piers that reach below the active soil zone, so the new addition moves with the original home instead of pulling away from it. Skipping this step is the most common cause of cracked brick, sticking doors, and separated rooflines in DFW additions.
Tell us what you need more of and we’ll walk the lot, check the setbacks, and give you an honest budget range before you commit to anything.
