Project type
KitchenBathroomAdditionWhole-home
Size
Finish level
Builder-gradeStandard materialsMid-rangeQuality upgradesHigh-endPremium, custom

Home Addition Cost in Houston

A builder-grade home addition in Houston typically costs $34,000–$55,000, about $113–$183 per square foot for a Room or suite (~300 sq ft) addition. The biggest cost drivers are foundation & framing, roofing & exterior, and plumbing & electrical.

$34k–$55k

Most builder-grade medium projects in Houston fall within this range.

What a builder-grade addition typically includes

  • Foundation & framing
  • Standard siding & roofing
  • Builder-grade windows
  • Basic interior finishes
  • Code electrical & HVAC

What could push the cost higher

  • Building up (second story) instead of out: engineering, stairs, roof work
  • Houston clay-soil foundations (slab vs. pier-and-beam) and movement
  • Adding plumbing-heavy rooms (kitchen/bath) vs. a bedroom
  • Upsizing HVAC for the added load in Houston heat
  • Permits, architectural plans, HOA approvals, and floodplain/setback rules

Where your budget goes

CategoryEstimated range
HVAC$2,700 – $4,400
Insulation & drywall$2,700 – $4,400
Windows & doors$3,400 – $5,500
Flooring & finishes$3,400 – $5,500
Plumbing & electrical$4,100 – $6,600
Labor & project management$4,100 – $6,600
Roofing & exterior$5,100 – $8,300
Foundation & framing$8,500 – $13,800

Think of this as a starting point for budgeting. We use recent Houston-area remodeling data and national cost benchmarks to estimate what projects like yours could cost. Final pricing can vary based on your home’s condition, design choices, and contractor. Most projects also benefit from a contingency budget to cover surprises along the way.

Contractor renovating a home exterior

Renovate with confidence.

  • Get 3 competitive bids from qualified and vetted contractor network
  • Workmanship warranty
  • A renovation advisor to support your project

There’s no added costs to renovate with RENI.

Learn moreStart your project

Frequently asked questions

A builder-grade home addition in Houston typically costs $34,000–$55,000, or about $113–$183 per square foot for a Room or suite (~300 sq ft) addition. Most projects fall within this range; final pricing depends on your home’s condition, design choices, and contractor.

A builder-grade home addition typically includes foundation & framing, standard siding & roofing, builder-grade windows, basic interior finishes, and code electrical & hvac.

Common reasons a home addition runs past its estimate include building up (second story) instead of out: engineering, stairs, roof work, houston clay-soil foundations (slab vs. pier-and-beam) and movement, adding plumbing-heavy rooms (kitchen/bath) vs. a bedroom, upsizing hvac for the added load in houston heat, and permits, architectural plans, hoa approvals, and floodplain/setback rules.

A mid-range home addition typically runs $55,000–$90,000, versus $34,000–$55,000 for builder-grade, about $27,000 more at the typical estimate.

Mid-range home additionHigh-end home addition

Estimates based on recent Houston-area remodeling data and national cost benchmarks. They reflect typical Houston pricing for a builder-grade project, but keep in mind that this is a ballpark range. There are plenty of variables that may affect your pricing.