Castillo Bay Builders LLC

About Us

We are a Full Service Contractor and Builder in the Bay Area

Castillo Bay Builders is a Bay Area construction company with over 20 years of experience in the industry. We are a team of professionals dedicated to the highest standards and committed to assisting our clients by making it an easy, affordable, and simple process from design to finishing the construction project. We specialize in interior remodeling, renovations, ADUs (Accessory Dwelling Units), additions, and custom homes from design to building.

In interior remodeling, we can assist with bathroom remodeling, kitchen remodeling, and any other interior space needing a personal touch. In renovations whether is retaining walls, roofing, foundation, retrofit, window replacement, french drains, siding replacement, plumbing, and painting.

With ADUs, Garage conversions, Additions, and custom homes whether is a 200-square feet addition or a 1,000 square feet we handle the entire process from floor plan design to turning the door key to our clients.

We take pride in maintaining our craftsmanship and building trust with our clients with the mission to create the best experience and best living space for our customers. Trust and quality are the pillars for keeping us in business for many years.

Please let us know how we can help with your next project, whether that’s to build an office space, remodel your kitchen or bathroom or build additions and ADUs.

Client Testimonials

“ Castillo Bay Builders did an amazing job! The whole process was very easy and fast, allowing room for any questions all throughout the fencing project. There was a sense of comfort and assurance from day one, that I know I wouldn’t have gotten anywhere else. They checked in and see how it was to our liking and made sure that we approved of every detail, making sure that we were satisfied customers. Have definitely recommended and will reach out again for future projects. ”

" Professionalism, quality and time management is a priority when I need to get a project done in my home and they hit the nail in head. The outcome was better than I expected. Thanks guys. "