| Business | Phone |
| Conco Cement Co 5141 Commercial Cir, Concord 94520 | (925) 685-6799 |
| Daridon Inc 5075 Commercial Cir # C, Concord 94520 | (925) 676-4423 |
| A A Quality Concrete Co Concord 94520 | (925) 676-2927 |
| A W De Rouen Construction 5 Eastridge Ln, Concord 94518 | (925) 689-7116 |
| Aussie-Crete Stamped Div Concord 94518 | (925) 250-0938 |
| C & C Engineering 1079 Mohr Ln, Concord 94518 | (925) 497-3037 |
| Calaveras Cement Co 2300 Clayton Rd, Concord 94520 | (925) 609-7181 |
| Costa Concrete Co 964 Glasgow Rd, Concord 94518 | (925) 825-1144 |
| General Cement Co 1579 Farm Bureau Rd, Concord 94519 | (925) 680-1411 |
| Hansen's Concrete 1441 Detroit Ave # 138, Concord 94520 | (925) 349-6632 |
| Jack's Patio Co 2225 Via De Mercados, Concord 94520 | (925) 685-0834 |
| James Madison Concrete Repairs 4243 Sherwood Ct, Concord 94521 | (925) 676-9920 |
| Jimenez Concrete 2373 Riverview Dr, Concord 94520 | (925) 676-2054 |
| Lua Concrete 1620 Frisbie Ct, Concord 94520 | (925) 685-6096 |
| W C Concrete 1949 Arnold Industrial Way, Concord 94520 | (925) 687-8044 |