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. Whether you are looking for a new driveway or sidewalk installation or need help fixing your crumbling foundation walls – our experts will be happy to provide you with a free estimate on any project that needs attention. We can also do decorative work like stamped concrete patios without breaking your budget!