At Alpine Haus Construction, we specialize in designing and building custom Accessory Dwelling Units (ADUs) and room additions in San Jose and the surrounding Bay Area.

With decades of expertise, we specialize in designing and building high-quality home additions that enhance both functionality and property value. Serving homeowners across the Bay Area—including Menlo Park, Los Gatos, Campbell, and San Jose—we deliver custom solutions tailored to your needs.

Let’s build your home with us today!

ADU Features

  • Increased Property Value

  • Additional Income Opportunities

  • Compact & Efficient Design

  • Flexible Living Arrangements

ADU & Room Addition Process

  • Define Your Goals

    Start by determining the primary purpose of your Accessory Dwelling Unit (ADU). Whether you’re looking to generate rental income, create a private home office, or expand your living space for family members, having a clear objective will guide the design, layout, and functionality of your ADU.

  • Work with our Expert Design Team

    Our experienced architectural engineers specialize in designing custom ADUs that maximize space efficiency while seamlessly blending with your existing property. We handle everything—from initial planning to final execution—ensuring a smooth, stress-free construction process tailored to your needs.

  • Plan Your Budget for Long-Term Success

    Setting a well-defined budget is crucial. Consider all aspects, including construction costs, potential rental income, and financing options, to ensure your ADU project remains financially viable while adding long-term value to your home.

Spacious room addition in Los Gatos for extra living space

Our Custom ADU & Addition Projects

Schedule A Free Consultation

Choose Alpine Haus Construction for your room addition or ADU project and enjoy the perfect balance of functionality, elegance, and personal service that has established us as a trusted name in the industry. Let us help you reimagine your property’s potential.