A fixed-price addition project from our Plano-based DFW team serving Allen 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.
A home addition in Allen typically runs $120,000 to $400,000, depending on square footage, whether you’re going up or out, and how much the new space ties into existing plumbing, electrical, and HVAC. A primary-suite or single-room bump sits at the lower end; a second-story or large multi-room addition reaches the top. Permits run through the City of Allen’s Building and Permitting Division (Community Development Department) via the Citizen Self-Service portal, which reviews plans and inspects the work. A real Allen cost driver: many neighborhoods here — Twin Creeks, Star Creek, Bethany Lakes — sit under active HOAs with architectural-review standards, so an addition’s rooflines, brick, and elevation often must be approved to match the original 1990s-2000s builder home before construction starts, which shapes both design and timeline. UHS quotes a fixed price up front, backed by our 1-year workmanship warranty. 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.
Allen grew up fast. Most of the city’s homes went up during the 1990s and 2000s boom that took Allen from a small town to a Collin County suburb of more than 117,000 people, so the median build year here sits around 2003. That matters for additions: a huge share of Allen houses are now 20 to 35 years old, built as two-story brick family homes on suburban lots in master-planned communities like Twin Creeks, Star Creek, and Waterford Crossing. Families who love their schools and street don’t want to leave — they want more room. That’s why UHS Remodeling builds room additions, second-story and primary-suite expansions, sunrooms, and in-law suites that read as original to these 2000s-era Allen builds rather than tacked-on. Since 2014 we’ve remodeled DFW homes with a fixed-price model and a 1-year workmanship warranty.
We build home additions across Allen, including Willow Bend, Legacy West, Deerfield, Hunters Glen, Russell Creek, and West Allen 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 Allen 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 Allen 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 Allen 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 Allen 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 Allen. Looking for ballpark numbers? Try our cost calculator.
Yes to both in most cases. The City of Allen’s Building and Permitting Division (Community Development Department) issues the permit through its Citizen Self-Service portal and inspects the structural, plumbing, electrical, and mechanical work. Separately, many Allen neighborhoods — Twin Creeks, Star Creek, Bethany Lakes — have HOAs with architectural-review rules, so your addition’s elevation and materials usually need HOA sign-off to match the original home before the city permit clears.
Yes. Most Allen homes are brick-clad two-story builder homes from the late 1990s and 2000s, and our goal is for an addition to read as original — matching brick, rooflines, window styles, and interior finishes so it doesn’t look tacked on. UHS Remodeling has been building across DFW since 2014, and we design additions to satisfy both Allen’s plan review and your neighborhood’s HOA standards.
Most home additions in Allen run $120,000 to $400,000. A single-room or primary-suite addition lands toward the lower end, while a second-story or large multi-room addition reaches the upper end. Because so many Allen homes were built in the 1990s-2000s on suburban lots, cost is driven heavily by how the new space connects to existing foundation, roofline, and mechanical systems. UHS Remodeling gives a fixed price up front, backed by a 1-year workmanship warranty.
Most home additions in Allen take 12-24 weeks. Garage conversions take 6-10 weeks. Room additions average 12-16 weeks. Second-story additions can run 16-24 weeks. Timeline includes HOA approval, permitting, and construction.
Yes. All home additions in Allen require building permits including foundation, structural, framing, electrical, plumbing, HVAC, and final occupancy inspections. UHS Remodeling handles all permits and inspections.
Most Allen HOAs approve well-designed additions that comply with setback requirements, lot coverage limits, and material matching standards. UHS Remodeling prepares and manages HOA submissions for Twin Creeks, Star Creek, Montgomery Farm, Ridgeview, and Watters Creek.
Second-story additions in Allen cost $150,000-$300,000+ depending on square footage. A 1,000 sq ft addition averages $150,000-$200,000. Larger additions of 1,500-2,000+ sq ft can exceed $300,000. Costs include foundation reinforcement, framing, staircase, MEP systems, and finishing.
Yes, with proper building permits. Conversions must meet residential codes for insulation, electrical, HVAC, egress, and ceiling height. Costs range $30,000-$60,000. Some Allen HOAs have restrictions on garage conversions.
Yes. Room additions recoup 60-70% at resale. Second-story additions often deliver higher returns when the cost per square foot is below the neighborhood average. In established Allen neighborhoods, additions that match neighborhood size expectations can increase value disproportionately.
Garage conversions are the most affordable at $30,000-$60,000 since the structure already exists. Sunrooms are next at $40,000-$80,000. Ground-level room additions start at $80,000 for the best new-construction value per square foot.
Yes. Most Allen homeowners live at home during addition construction. We seal the connection point to minimize dust and noise. Only major second-story additions requiring structural reinforcement of the existing first floor may need temporary relocation.
Call (469) 850-7087 or schedule a consultation online. We evaluate your lot and structure, discuss the space you need, review HOA guidelines, and provide a detailed 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 Allen 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.
