Get matched with top addition and remodeling pros in Challenge, CA

"Working with Blair Plunkett was one of the best decisions I made on this project. He handled a full house remodel for me and made the whole process feel straightforward and manageable. Pricing was fair, communication was solid, and the quality of work really shows. What stood out most was his integrity—he took the time to fix and repair my deck even though it wasn’t part of the original bid. No upsell, no hassle, he just handled it. That’s rare. Good contractor, better person. I’d absolutely work with him again."

"They were respectful and completed all the deliver on the timeline that they promised. Quality installation and they got it done in one day."

"I hired Gilbert to remodel my guest bathroom in my home. I have used Paz Construction on several projects for design clients of mine and I am incredibly happy with the quality of the work. He is timely, hard working, he cleans up after ( which believe it or not , not every contractor does ) and delivers excellent service. Highly recommended"

"I am very happy with the work done by Cannon General Contracting. They showed up when they said they would, did excellent work and kept us informed throughout the project. Everything was completed on time and with great care. It’s hard to find contractors you can truly trust and Scott and his team are definitely one of them! I highly recommend them."

"Found Sentri on Angi. Jeanette and Violet were very pleasant and efficient in getting a contractor to me in the time frame needed. The contractor was excellent and the roof looks great! I would definitely work with them again if I had additional projects."

Over 30 years of experience. \nOne call does it all!!

Alpha Developments is a full-service construction and development company specializing in high-quality residential projects, renovations, and custom construction. We bring together experienced craftsmanship, thoughtful design, and disciplined project management to deliver exceptional results tailored to each client’s goals.\nOur approach is built on quality, integrity, attention to detail, and clear communication throughout every stage of the project. From initial planning and design through construction and final completion, we are committed to maintaining the highest standards of workmanship and professionalism.\nAt Alpha Developments, we transform properties into thoughtfully designed, beautifully executed spaces that provide lasting value and reflect the unique vision of every client.\n

"Very professional. Completed the job in two weeks. The deliverables were as promised. They were very independent, requiring only minimal involvement from the client. However, communication with the owner could be enhanced a bit."

"We recently had Mega Power Electric Inc install a solar system and panels. The President and provided excellent communication all the way through the process. He even met with us after installation to explain the almost incomprehensible PG&E bill. Although not the least expensive bid, his was competitive and I felt he was as interested in educating me about solar and the various types of panels and inverter systems as he was in selling a system. He demonstrated how the array of panels would meet our energy needs and as opposed to some of the other companies, wasn't selling us more than we needed. We are very satisfied with our solar system and I highly recommended Mega Power Electric Inc."

"This bathroom remodel was flawless snd wonderful. Every aspect is praiseworthy. Roget snd his skilled team are the best. Everything we were told was carried through. They showed up on time, worked carefully and cleanly and were very helpful with suggestions. Roger could always be reached and helped us in saving a lot of money in materials We are beyond delighted and will recommend Mt. Tam Construction to anyone looking for quality in craftsmanship and humanity."