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Home Addition · Richardson · TX · (469) 850-7087

Home additions in Richardson, TX,
that look like they were always there.

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, 5,875 projects, one promise: your quote is your price.

500+
Five-star reviews
3-yr
Workmanship warranty
5,875
Projects since 2014
Home Addition in Richardson, TX by UHS Remodeling
Richardson · 2026
The short answer

How much does a home addition cost in Richardson?

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 3-year workmanship warranty. For a line-item look at where the money goes, see our DFW remodel cost guide.

01 · Process

How we build a home addition in Richardson.

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 completed 5,875+ DFW projects since 2014, with a fixed-price model and a 3-year workmanship warranty.

We build home additions across Richardson, including Richardson Heights, Canyon Creek, Heights Park, Buckingham, and Greenwood Hills.

01
Consultation
Site walk, scope (bedroom, master wing, second story), zoning + setback review, budget alignment.
02
Design
Architectural drawings, structural engineer review, exterior match planning, MEP routing.
03
Permits
City of Richardson plan review, HOA architectural committee, energy code compliance. Average 3-5 weeks.
04
Build
Foundation, framing, roof tie-in, MEP rough-in, insulation, drywall, finish-out. 12-22 weeks per scope.
05
Walkthrough
Final inspection, punch list, certificate of occupancy filing, 3-year warranty active.
Daniel B., Co-Founder, Construction Lead at UHS Remodeling
From the field · Richardson
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.
Daniel B.
Co-Founder, Construction Lead
03 · Transparent pricing

Richardson addition ranges by tier.

All ranges include design, materials, labor, permits, and 3-year warranty. Sourced against NARI Cost vs. Value 2025 regional benchmarks.

Tier
Price
What’s included
Essential
$120–180K
Single-room addition (250-450 sqft): bedroom, office, sunroom. Exterior match, standard finishes, full MEP.
Refined
$180–280K
Master wing or large family room (450-800 sqft): primary suite + bath, formal dining add-on, or great room expansion.
Custom
$280–400K+
Second story or full custom (800+ sqft): structural foundation work, full second floor, matched exterior, custom millwork.
04 · Also in Richardson

Other ways we transform Richardson homes.

See all Richardson home remodeling services →

UHS Remodeling construction lead Daniel B. reviewing blueprints on a DFW job site
Your UHS team

Your construction lead, Daniel B., runs your addition from framing to final inspection.

Nearby DFW

We serve home additions across nearby DFW communities. See our home additions in Plano, Garland, and Dallas.

05 · FAQ

Richardson addition questions, answered.

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.

Do I need a permit and an engineer for a home addition in Richardson?
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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.
Can you add a second story to a mid-century ranch in Richardson?
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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.
How much does a home addition cost in Richardson, TX?
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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.
How long does it take to build a home addition in Richardson?
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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.
Do I need a permit for a home addition in Richardson, TX?
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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.
What is the maximum lot coverage allowed in Richardson?
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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.
Can my existing foundation support a second-story addition?
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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.
Is it cheaper to build an addition or move to a bigger house?
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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.
Will a home addition match my existing home’s architecture?
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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.
What happens to my HVAC system when I add space?
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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.
Can I build an ADU or in-law suite in Richardson?
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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.
How do I get started with a Richardson home addition?
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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.
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Home Addition in Richardson, TX