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, 5,875 projects, 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 3-year workmanship warranty. For a line-item look at where the money goes, see our DFW remodel cost guide.
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 completed 5,875+ DFW projects with a fixed-price model and a 3-year workmanship warranty.
We build home additions across Allen — Twin Creeks, Star Creek, Watters Crossing, Montgomery Farm, Cumberland Crossing, Waterford Crossing, and Bethany Lakes.
“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.”
All ranges include design, materials, labor, permits, and 3-year warranty. Sourced against NARI Cost vs. Value 2025 regional benchmarks.
Your construction lead, Daniel B., runs your addition from framing to final inspection.
We deliver home additions across nearby DFW communities. See our home additions in home additions in Plano, Frisco, and McKinney.
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.
