According to Diamond Concrete Co. homeowners, they are the best concrete contractor in Diamond Bar. Our company has been providing top-notch construction services for years and we are now proud to serve all of Southern California with our expert team of contractors, designers, engineers, estimators, and skilled laborers! No matter if you need help with foundation repairs or a new driveway, our experts can provide a free estimate. We can also do decorative work like stamped concrete patios without breaking your budget!