| Business | Phone |
| Khs & S Contractors Inc 2500 Dean Lesher Dr # B, Concord 94520 | (925) 677-0828 |
| Ags Construction Svc 4498 Hock Maple Ct, Concord 94521 | (760) 775-5252 |
| Beny Construction 1541 Lexington Rd, Concord 94520 | (925) 680-2530 |
| Consolidated Home Svc 3882 Chestnut Ave, Concord 94519 | (925) 827-1762 |
| G S Enterprises 957 Shadybrook Dr, Concord 94521 | (925) 335-0755 |
| J W Construction Inc 946 Notre Dame Ave, Concord 94518 | (925) 680-7558 |
| Locher Construction 1133 Winton Dr, Concord 94518 | (925) 674-1980 |
| Modern Design Construction Inc 2250 Commerce Ave, Concord 94520 | (925) 682-8337 |
| Nbc General Contractors 1135 Lacey Ln, Concord 94520 | (925) 363-5888 |
| Osl Construction Inc 4756 Clayton Rd, Concord 94521 | (925) 288-0240 |
| Simoneaux Construction 4609 Lincoln Dr, Concord 94521 | (925) 689-6460 |