A fixed-price addition project from our Plano-based DFW team serving Addison 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 Addison typically runs $120,000 to $400,000, depending on whether you are bumping out a single room, adding a full second story, or building a primary-suite or in-law wing onto an existing 1980s-90s home. Permits and inspections run through the Town of Addison’s Development & Neighborhood Services department and its Building Safety / Building Inspections program, with plans submitted through the Town’s online permit portal. The biggest Addison-specific cost driver is the town’s small, fully built-out lots: because Addison is a landlocked Dallas County town dense with townhomes, condos, and tight single-family parcels like Les Lacs, many additions must go vertical (second story) rather than outward, which adds engineered foundation reinforcement, structural framing, and HOA architectural review. UHS prices all of this up front with a fixed-price contract and backs the work with a 3-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.
Addison is one of the smallest, most built-out towns in Dallas County, so a home addition here is rarely a sprawling expansion across an open yard. Much of Addison grew during its 1980s boom, and outside of the traditional single-family pockets like Les Lacs, the town leans heavily toward townhomes, condos, and the walkable Addison Circle and Vitruvian Park districts. That means UHS designs additions to fit tight, fully developed lots: second-story master suites over an existing 1980s-90s footprint, garage conversions and bump-outs, and sunroom or in-law suites tucked into compact backyards near Restaurant Row and Addison Circle Park. With 5,875+ DFW projects since 2014 and a fixed-price model, we engineer additions that respect Addison’s mature lots, HOA standards, and the reality that here you usually build up, not out.
We build home additions across Addison, including Willow Bend, Legacy West, Deerfield, Hunters Glen, Russell Creek, and West Addison 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 Addison 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, 3-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 Addison 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 Addison 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 3-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 Addison 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 Addison. Looking for ballpark numbers? Try our cost calculator.
Yes, and in Addison it is often the most practical option. The town is small, landlocked, and densely developed, so many single-family lots do not have room to expand outward. Building up over your existing footprint preserves yard space but requires an engineer to confirm the foundation and framing can carry the added load. UHS handles that structural analysis, the Town of Addison permitting, and any HOA architectural review as part of the project.
Both, in most cases. The permit comes from the Town of Addison’s Building Safety / Building Inspections program under Development & Neighborhood Services, submitted through the Town’s online portal. Separately, because a large share of Addison is governed by HOAs and townhome or condo associations, you will usually also need architectural review and association approval before construction. UHS manages the permit submittals and coordinates with your association so the addition stays compliant.
Most home additions in Addison fall between $120,000 and $400,000. A single-room bump-out sits at the lower end, while a full second-story addition or a large primary-suite wing pushes toward the top. Because Addison’s lots are small and built-out, second-story additions are common here, and the engineered foundation and structural work they require is a major factor in the final price. UHS gives you a fixed-price contract so the number does not move mid-project.
Single-room additions take 12–22 weeks. Multi-room wing additions run 8–13 months. Second-story and estate-scale additions take 12–20 months.
Yes, subject to height, setback, and lot coverage limits plus HOA restrictions. Not every foundation is adequate for a second-story load — we run a structural feasibility check early.
Yes. Garage conversions are cost-effective because the foundation, walls, and roof exist. Requires a permit, new flooring, HVAC and electrical tie-in, and HOA approval.
Generally no. Mid-rise condominiums and attached townhomes do not permit additions. Interior renovations or kitchen/bath remodels are the alternative.
We source matching brick, stone, siding, and roofing. For brick, we match color, size, and mortar joint profile. Matching materials may add 4–8 weeks to procurement.
Yes. Most Addison HOA neighborhoods require architectural review. The HOA process runs in parallel with the city permit process. UHS handles both submissions.
Usually yes, especially for rear additions and garage conversions. For second-story additions, most homeowners relocate for 5–12 weeks during structural phases.
Yes. Every addition is engineered by a licensed Texas structural engineer. We handle full foundation scope and all structural framing including steel beams.
Call (469) 850-7087 or fill out the contact form. Free in-home consultation, feasibility assessment, preliminary ROM within 7–10 business days.
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 Addison 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.
