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! 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!