General Contractors in Fontana, CA

We are United Builders California Inc., a licensed general contractor serving Los Angeles and Orange County. We specialize in home and commercial renovations—kitchen and bathroom remodels, 3D design, ADUs, painting, stucco, and patio decks—with a focus on quality craftsmanship and customer satisfaction.

We have 20 years of experience in the space and pride ourselves for the quality of work that we provide

our focus is quality. Alpha One is your go-to contractor for all of your custom roof installation and repair needs, whether you need to fix that leaky roof or beautify your home. We have many years of experience installing shingle roofs, tile roofs, and cool roofs as well as provide you with superior insulation. We can save you money on your utility bill every month in the long run. General contractor,&Roofing Contractor. Licensed & Insured! Alpha One Construction Inc. is more concerned about providing the best service to our clients than with being the largest in the industry. For the past two decades, we have developed a solid reputation by simply being reliable, trustworthy and affordable.

We believe in the right job done by the right people. Quality takes time and knowledge always prevails. Our team has over 20 years working experience and has seen both sides of the construction world.