GET YOUR FREE HOME REMODEL CONSULTATION

By submitting, I agree to receive text messages from USA Home Remodeling regarding remodeling services, as described in the Privacy Policy. Message and data rates may apply.

Room Additions & ADU in Orange County-
Custom Home Expansions

Add More Space, Value & Comfort to Your Home

Looking to add a new bedroom, expand your kitchen, or build a second-story addition? At USA Home Remodeling, we specialize in room additions in Orange County and San Diego, helping homeowners increase their living space without the stress of moving. Whether you're expanding for a growing family or creating a luxurious new suite, our licensed remodeling experts can design and build a space that blends beautifully with your existing home.

Why Homeowners Choose Our Room Addition Services

Adding a room to your house is a smart investment that increases square footage and resale value. We help California homeowners customize their homes to fit their changing needs.

Benefits of a professional Room Addition

  • Extra space for growing families and guests.
  • New Home Office, Gym or Playroom.
  • Increased property value and curb appeal
  • Avoid the hassle and cost of moving.
  • Designed to match your home’s structure and style

Trusted Room Addition Contractors in Southern California

As a leading home remodeling company in Orange County and San Diego, we provide full-service solutions:

  ✅ Free in-home consultation & 3D design 

  ✅ Architectural planning and city permits 

  ✅ Engineering and structural foundation work 

  ✅ Seamless construction and finishing 

  ✅ Fully licensed, bonded, and insured team

Types of Room Additions we build.

  • Bedroom & Master Suite Additions

  • Second-Story Room Additions

  • Bathroom Additions

  • Living Room / Family Room Expansions

  • Garage Conversions & ADUs

  • Kitchen Bump-Outs

  • Home Office or Studio Additions

     Each project is customized with high-quality craftsmanship and tailored to your space, budget, and goals.

Our Room Addition process

  1. Free consultation to understand your goals

  2. 3D renderings and design approval

  3. Permit handling and city compliance

  4. Construction, inspections, and final walkthrough

     We manage everything from concept to completion — so you can enjoy a stress-free remodel.

Get a Free Estimate on Your Room Addition

Ready to expand your home? USA Home Remodeling is your trusted local expert for room additions in Orange County.

📞 Call (888)-872-5082

 

📞 Call us at (888) 872-5082 or simply leave your information below. We’ll contact you to schedule your complimentary consultation.

SCHEDULE YOUR COMPLIMENTARY CONSULTATION

By submitting, I agree to receive text messages from USA Home Remodeling regarding remodeling services, as described in the Privacy Policy. Message and data rates may apply.

FAQs About Our Room Addition Services

A room addition expands your existing home by adding square footage—like a new bedroom, kitchen extension, or second story. An ADU (Accessory Dwelling Unit) is a separate, self-contained living space that can be detached or attached, often used for guests, rental income, or multigenerational living. USA Home Remodeling specializes in both, helping you choose the right solution for your property and goals.

es, both room additions and ADUs require city permits and zoning approvals. Our team handles the entire permitting process, ensuring your project meets all California building codes, city ordinances, and structural requirements. We manage the paperwork so you don’t have to.

Room additions in Southern California typically range from $200 to $400 per square foot, depending on design, materials, and complexity. ADUs generally start around $120,000–$250,000, depending on whether they are garage conversions, attached units, or detached new builds. We provide free estimates and 3D designs to help you plan your investment.

Most room additions and ADUs take between 10 to 16 weeks, not including design, permits, and construction. Larger or more complex projects may take longer. At USA Home Remodeling, we create a detailed project timeline and keep you informed every step of the way.

Absolutely. Every room addition and ADU we build is fully customized to your needs—whether it’s a master suite, home office, rental unit, or in-law suite. You’ll work with our design team to select layouts, finishes, and fixtures, and we’ll show you exactly what to expect with a realistic 3D rendering before construction begins.

WE SERVICE MOST OF THE LA COUNTY AREA