A fixed-price addition project from our Plano-based DFW team serving Richardson 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 Richardson typically runs $120,000 to $400,000, depending on square footage, whether you build out or up, and how much the new space ties into existing kitchen, plumbing, and HVAC systems. Permits are issued by the City of Richardson Building Inspection Department, which requires a Room Addition / Patio Enclosure permit; critically, Richardson mandates that the new foundation be engineered and stamped by a licensed Texas engineer, an upfront cost most homeowners do not anticipate. The biggest city-specific cost driver is the mid-century ranch itself: these 1950s-70s slab-on-grade homes often have shallow original foundations, undersized electrical service, and load-bearing brick walls, so tying a modern addition into the existing structure frequently means upgrading the panel, matching aged brick, and reworking the roofline. Our fixed-price quote locks in scope before demo, and every Richardson addition carries 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.
Richardson grew up fast in the 1950s and ’60s, when Collins Radio, Texas Instruments, and the new Central Expressway (US-75) turned a tiny town into a first-ring Dallas suburb. The result is a city full of mid-century ranch homes: brick exteriors, low-pitched roofs, and wide single-story front elevations on mature, tree-lined lots in neighborhoods like Richardson Heights, Canyon Creek, Buckingham, and Greenwood Hills. Those efficient post-war floor plans were built for a different era. Today’s Richardson families love the location near UT Dallas and the Telecom Corridor but need more room, so a home addition, a primary-suite expansion, a second story, or a bumped-out family room is one of the smartest ways to stay put. UHS Remodeling has remodeled DFW homes since 2014, with a fixed-price model and a 1-year workmanship warranty.
We build home additions across Richardson, including Willow Bend, Legacy West, Deerfield, Hunters Glen, Russell Creek, and West Richardson 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 Richardson 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 Richardson 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 Richardson 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 Richardson 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 Richardson. Looking for ballpark numbers? Try our cost calculator.
Yes. The City of Richardson Building Inspection Department issues a Room Addition / Patio Enclosure permit for additions, and the city specifically requires the new foundation to be engineered and stamped by a licensed Texas engineer. Smaller qualifying projects may use Richardson’s Express Permitting program, which guarantees a 3-business-day plan review. UHS handles the permit and engineering coordination as part of the project.
Often, yes. Many Richardson homes are single-story 1950s-60s ranches on lots where families want more space without leaving the neighborhood. A second-story or pop-top addition can work, but because these homes have original slab foundations and post-war framing, we have a licensed Texas engineer evaluate whether the existing foundation and structure can carry the added load, then design the addition accordingly under the city’s permit requirements.
Most Richardson home additions run $120,000 to $400,000. The range depends on size, whether you add a single room or a full second story, and how extensively the new space ties into existing plumbing, electrical, and HVAC. Tying into a 1950s-70s ranch often adds cost for foundation engineering, panel upgrades, and brick matching. UHS gives a fixed-price quote so the number is locked before demolition begins.
Most Richardson home additions take 12-24 weeks. Garage conversions and sunrooms take 8-12 weeks. Room additions take 12-16 weeks. Second-story additions require 16-24 weeks. Add 2-4 weeks for City of Richardson permit review before construction begins.
Yes. The City of Richardson requires building permits for all home additions including room additions, second-story builds, sunrooms, garage conversions, and ADUs. You need structural, electrical, plumbing, and mechanical permits plus a site plan showing setback and lot coverage compliance. UHS Remodeling handles the entire permit process.
Lot coverage limits in Richardson residential zones typically range from 40-45%, meaning combined footprint of home, addition, garage, and structures cannot exceed that percentage of total lot area. Setback requirements also apply. These limits are the primary constraint on ground-floor additions.
Most Richardson homes built in the 1970s-1990s were not originally designed to support a second story. A structural engineer evaluates the existing foundation, determines reinforcement needs, and designs the support system. In many cases, the foundation can be supplemented with additional piers rather than replaced entirely.
In Richardson’s current market, building an addition is often more cost-effective. When factoring in real estate commissions (5-6%), closing costs, moving expenses, and the price premium for a larger home, moving frequently costs more than adding equivalent space. An addition also lets you stay in your neighborhood and keep your property tax basis.
We design every addition to integrate smoothly with the existing home’s roofline, exterior materials, window styles, trim profiles, and interior finishes. We source matching materials and pay close attention to proportions so the addition looks like part of the original design.
Adding conditioned space increases HVAC load. We perform a load calculation to determine if your existing system can handle the additional square footage. Often we recommend upgrading or installing a supplemental mini-split unit for the addition. HVAC costs for additions typically range from $5,000-$15,000.
Yes, but Richardson has specific ADU regulations including maximum size limits, parking provisions, setback compliance, and owner-occupancy rules. ADUs must meet the same building code as the primary home. We research zoning regulations for your property during feasibility assessment.
Call (469) 850-7087 or schedule a consultation online. We visit your Richardson property, evaluate the lot and structure, discuss your space needs, and determine the best addition type. You receive 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 Richardson 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.
