Room Additions & Home Expansions in Santa Clara & Monterey Counties, CA

If you love your home but wish it had more space, a custom room addition may be the perfect solution. At AV Builders Group, we specialize in creating seamless, functional, and beautiful home expansions that enhance both comfort and value. Whether you’re expanding for a growing family, adding a dedicated home office, or simply want more space to enjoy, our team is here to help you build smarter—not just bigger. Serving Santa Clara & Monterey Counties, CA and surrounding areas, we bring decades of construction experience and a passion for quality to every project. Call (408) 427-2330 today to schedule your free consultation and take the next step toward the extra space your home deserves.

Boost Home Value With Expert Additions

Adding a new room to your home is one of the most effective ways to increase property value and enhance livability without the hassle of moving. Whether it's a bedroom addition, second-story expansion, or extended family living space, our experienced team ensures the new addition looks and feels like it was part of the original home.


From the foundation to the roofline, we match your existing structure, finishes, and aesthetic—so everything flows naturally. Our goal is to create space that improves your quality of life while adding long-term financial value to your property.

Homeowners Choose Additions for Many Reasons

A lack of usable space is one of the most common challenges homeowners face.


Here are just a few reasons clients come to us for room additions:

  • Growing families needing extra bedrooms or playrooms
  • In-laws moving in and requiring private quarters
  • Home offices or studios for remote work and creativity
  • Expansions for home gyms, hobby rooms, or dens
  • Converting unused space into income-generating Accessory Dwelling Units (ADUs)


Whatever your reason, we help you find the most functional and cost-effective way to expand your living area.

Tailored Designs for Every Need

We understand that every family’s needs are different. That’s why we begin each project with a consultation and site assessment to better understand your goals, budget, and property layout. Our team collaborates with you or your architect to design an addition that reflects your vision while meeting local zoning and code requirements.

Common additions we build include:

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  • Master bedroom suites
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  • Living room extensions
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  • Second-story room builds
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  • Bonus rooms over garages
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  • Kitchen and dining expansions
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  • ADUs (Accessory Dwelling Units) with private entrances

With careful attention to design flow, natural light, and layout, we make sure your addition integrates seamlessly and serves you well for years.

The AV Builders Group Room Addition Process

1

Initial Consultation—We assess your goals, space, and budget.

2

Design Collaboration – Work with our team or your designer to finalize plans.

3

Permit Management – We handle all city permits and code compliance.

4

Construction – Our skilled team executes the build with precision and respect for your home.

5

Final Walkthrough – We ensure the project is completed to your satisfaction.

We take pride in keeping your project on time and within budget—without cutting corners.

Accessory Dwelling Units – A Popular Option in California

As California residents seek creative ways to expand and increase property value, ADUs have become one of the most requested room additions. These units offer a versatile solution for multi-generational living, rental income, or guest accommodations.



AV Builders Group designs and builds custom ADUs that comply with California regulations, provide privacy, and blend into your existing property design. Whether you’re adding a detached guesthouse or converting a garage, we’ll help you make the most of your space.

Expand Your Living Space Today

If your home is feeling a little too tight, it may be time to create more space that works for you. Let AV Builders Group bring your vision to life with high-quality construction and thoughtful design. Call (408) 427-2330 to get started on your room addition in Santa Clara & Monterey Counties, CA today.