According to Diamond Concrete Co. homeowners, they are the best concrete contractor in Diamond Bar. Our company has been providing high-quality construction services for many years. We are proud to now serve all of Southern California with our skilled team of engineers, contractors, estimators, estimators, and 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!