Get matched with top addition to existing structure builders in Diablo, CA

"Great! Excellent communication from the project manager, work crew went out of their way to do a great job and to pick up materials for me when delivery wasn't possible. They were punctual, cleaned up at the end of each day, tried to minimize the intrusion as much possible, and were really nice guys, great to work with. Work was done on time and on budget. Kitchen looks great and I couldn't be happier. The price was for labor and raw materials. We supplied the cabinets, lighting, countertops, sink, appliances, and windows. We also decided to get the attic insulated at the same time at their suggestion- that addition was not included in the cost below (I don't remember how much it was but it was reasonable.) Here's what the work included: Demo existing kitchen including walls, floor, ceiling and windows. New electrical sub panel and wiring in kitchen Gas line added to kitchen (gas was already in the basement area) Installation of new walls, floors, ceiling, windows, doors, trim Installation of cabinets, countertops, appliances, sink Painting Attic insulation (additional)"

"We hired OT Bay Builders to remodel our kitchen, and the transformation is beyond what we imagined! Their design team worked closely with us to bring our vision to life, suggesting great ideas while keeping our budget in mind. The craftsmanship is top-notch, and every detail—from the cabinets to the countertops—was executed perfectly. The team was professional, communicative, and always cleaned up after themselves. If you're considering a home remodel, look no further than OT Bay Builders!"

"After I contacted several contractors on a room addition I decided to go with Sky Tech Builders and I can tell that it was a really easy decision because they gave me great offer and they completely understood what I wanted to do. They were also available on acceptable time and project started soon after we signed a contract. The project manager and his crew were professional, honest, helpful and very respectful to me and my home. They finished project within time they promised and within my budget. And final outcome is excellent, I am fully satisfied with everything they did and would definitely work with Sky Tech Builders again!"

"Zacharias Remodeling Construction did an outstanding job remodeling my mom‘s kitchen in July 2025. Oscar, the contractor, was professional, responsive, and easy to work with from start to finish. His team was meticulous with every detail and always arrived on time which made the entire process, smooth and stress-free. This was especially important to me as I had experienced a contracting company in the past where the workers did not show up on time (or at all), cut corners, and it made for a lousy 2 months. The finished kitchen looks beautiful and without hesitation, Zacarias remodeling construction will be my first call for future projects."

"We asked about bringing a wall up to modern fire code so we can install major electrical equipment without worry. Bay Easy offered an inspection and quote on a schedule far quicker than we expected, then was able to plan and execute work on a tight turnaround, too. Ofer and his team were also great about telling us when demolition revealed existing problems and offering ways to deal with those issues without leaving us feeling pressured to accept expensive additions to the contract. They were then able to execute the additional work we chose while still staying within the original timeframe."

"Bear Remodeling Inc helped us with a room addition, and the whole experience was smooth and stress-free. The team was respectful, hardworking. The new space fits perfectly with the rest of our home. We are beyond pleased and highly recommend Bear Remodeling Inc for quality work and great service!"

"I had a great experience with My Remodeling Group during my kitchen remodel. From planning to completion, their communication was clear and consistent. They listened to my ideas, offered helpful design suggestions, and delivered high-quality craftsmanship. The kitchen now looks stylish, spacious, and much more functional. Everything was completed as promised, with great attention to detail. I highly recommend My Remodeling Group for professional and reliable remodeling services."

"It was a design and build project: a 1200 sq ft 2-story addition to an existing house - two bedrooms, three baths, family room with wet bar, and office. Also a new 2-car garage. Matt Kennedy creatively designed the connection so as to access an existing 2nd story bedroom to the new hallway which connected it to one of the two new bathrooms. Robert Cerletti chose and managed very well the various subcontractors who were mostly expert professionals in their specialties - foundation, building structure, roofing, HVAC, plumbing, electrical, stucco and painting, wood/tile/carpeted flooring, and all finishing touches. From experience they knew how to work with city planners to reduce time for permit issuances. They recommended some added special features such as crown moulding, ornate wood stair railings, custom bathroom fixtures, exterior French water drainage, and quality kitchenette cabinets in the family room. From start to finish the project completed on-time within 9 months - delayed only by some unexpected heavy rains at the beginning slowing some foundation work. Six months has now passed since project completion and I could not be more pleased with the new addition. Robert Cerletti was on site frequently, checking on subcontractor work, consulting with me for input, discussing suggestions and ideas, getting progress payments, and paying his subs on time. The project completed on budget except where I specified added work beyond plan. I highly recommend Cerletti and Kennedy for similar projects small or large."

"We decided to remodel our outdated bathroom, and McCormick Home Builders was a fantastic choice. Khaled and the team delivered high-quality work within the timeline and our budget. Every detail, from the tile work to the lighting, was beautifully done. They communicated well throughout, keeping us informed at every step, and the end result was truly a spa-like bathroom we can enjoy daily. We’d love to work with them again!"

"After meeting with around 10 contractors, I decided to go with EA Homebuilders. Eric seemed honest and willing to do our remodeling the way we wanted it done. Great decision. Eric, Hector and crew were courteous and finished the job in the time they said it would be done, less than a month. We love our new bath/ shower. Highly recommend and would use again."