Builder of the year


Call us directly 925-732-5512

What we do?



  • Build Custom Homes

  • Additions and Renovations

  • Backyard Transformations

  • Veranda’s and Pergola’s

  • Outside kitchens

  • Landscape and pool restorations

  • Fences and retaining walls

  • Custom ADU’s

  • Design Services

Backyard Transformations That are Hot!

About REI Homes and ADU’s 

If you’re an ambitious homeowner looking to expand your square footage, then connect with REI Homes and ADU Inc in California, for your home addition plans. With a focus on giving our clients stunning designs, the highest quality materials, with top professional workmanship and at the same time we are lower in cost and faster than most contractors in our area. Call us for a free design review and price estimate. Our kitchens, and bathrooms are gorgeous!  Take some time the view our homes in this website, you will be amazed!

Our 24-foot high ceilings with 20-foot sliding door leading to outside veranda with full kitchen, fireplace, heaters, fans and TV are our most popular designs. Backed by more than 37 years of experience, 500 homes built, we are licensed and insured and look forward to working with you on your next new home, ADU or renovation, or addition.

Home building requires time and can be stressful financially, but fortunately, you’ll be working with qualified and seasoned luxury home builders who can efficiently build your home or ADU project in rapid timing. Our ADU’s are price competitive and stunning in design offering open-air concepts with large sliding doors leading to a spacious veranda for year-round entertaining and enjoyment. Witness as we create your dream complete with energy-efficient structural insulated panels ensuring a net-zero energy effect lowering utility costs. With our hands-on experience integrating CAT6 Wi-Fi, your luxury home will be paired with the AI (Artificial Intelligence) voice-controlled environment of your choosing, whether it be Google or Alexa, or both. As visionaries, we strive to appease your home building desires. Our Homes and ADU’s are ahead of their time with environmental ambient lighting that dances to music and has over 16 million color combinations, all controlled from your phone or pad. The sky’s the limit with us, so should you have a specific design in mind, or would like to modify one of our award-winning designs, we’re available to determine the next steps to make your dream come true. Call us for a no obligation Q&A session to get your questions answered. We’re easy to talk with!

For an award-winning ADU home builder and luxury home renovation leader in California, connect with REI Homes & ADU’s. We sweep homeowners off their feet with the impressive luxury ADU homes we build. Aiming to be the greatest of all time, we assist realtors, homeowners, and investors with their desire to add value to a property.

From Design, Permits, Build, And Keys We Handle The Entire Project For You!

Looking for ideas click below for a free consultation or call Gary at 925-732-5512 directly!


    Gary Massari

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