How Much Does a Room Addition Cost
- amit mizrahi
- Jun 9
- 2 min read
2025 Room Addition Guide — Expand Your Living Space in Houston the Smart Way
Need more space but don’t want to move? A room addition is the perfect way to expand your home’s footprint, increase its value, and create the space your family needs — whether it’s for a new bedroom, home office, game room, or in-law suite.
In this blog, we break down 2025 room addition costs, types, timelines, and what to expect when building an addition in the Houston area.
💰 How Much Does a Room Addition Cost?
Room additions are custom projects, and prices depend on the size, design, location, and type of space you’re building.
Small Bedroom or Office
150 250 sq ft
$25,000 $45,000
Living Room / Den Extension
300 500 sq ft
$45,000 $75,000
Master Suite Addition
400 600 sq ft
$60,000 $100,000+
Garage or In-Law Suite
500 800+ sq ft
$75,000 $150,000+
Cost Factors Include:
✔️ Foundation work
✔️ Framing and structural build
✔️ Electrical and HVAC
✔️ Roofing and insulation
✔️ Interior finishing (drywall, flooring, painting)
✔️ Permits and inspections
🏡 Popular Types of Room Additions
Bedroom Addition – Add value and space for growing families.
Home Office – Perfect for remote work or small business setup.
In-Law Suite or Guest House – Includes bedroom, bathroom, and small kitchen.
Second Story Addition – Ideal for homes with limited lot space.
Sunroom or Enclosed Patio – Bring in light while increasing living space.
Garage Conversion – Transform unused space into a functional room.
🛠️ What’s Included in a Room Addition?
At HTR Houston Texas Remodeling, a full room addition includes:
✔️ Architectural planning & 3D design
✔️ Foundation and framing
✔️ Roofing, insulation, siding, windows
✔️ Electrical, HVAC, and plumbing (if needed)
✔️ Drywall, flooring, trim, and finishes
✔️ Permits, inspections, and project management
We take care of everything from permits to punch list.
⏱️ How Long Does a Room Addition Take?
Small bedroom/home office: 4–6 weeks
Master suite or garage conversion: 6–10 weeks
Second story addition: 10–16+ weeks
We provide clear project timelines and regular updates from start to finish.
💵 Financing Your Room Addition
We make big home projects more affordable with flexible financing:
🏦 0% Interest for 12 Months
💳 Low Monthly Payments
✅ Same-Day Approval
Ask us about your options during your free consultation.
📍 Serving Houston & Surrounding Communities
We proudly build additions for homeowners in:
Houston
Katy
Cypress
Sugar Land
The Woodlands
Spring & more
Licensed, insured, and backed by 20+ years of experience.
📞 Get Your Free Room Addition Estimate Today
Let’s expand your home the right way — with expert construction, clear communication, and high-quality results.
📞 Call now: 832-695-4062
🖥️ Or schedule your free estimate at
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