| Business | Phone |
| Bayside Insulation & Const Inc 4045 Nelson Ave # A, Concord 94520 | (925) 288-8960 |
| Bbs Masonry 1894 Brownwood Ct, Concord 94521 | (925) 429-1227 |
| Cardinal Consulting 2401 Stanwell Dr, Concord 94520 | (925) 681-3002 |
| Global Pacific Inc 5051 Commercial Cir # F, Concord 94520 | (925) 969-9090 |
| Metroplex 1401 Willow Pass Rd, Concord 94520 | (925) 686-5305 |
| Michael J Aruda Construction 1065 Shary Cir, Concord 94518 | (925) 609-6322 |
| Northern Pacific Construction 1485 Enea Cir # 1330, Concord 94520 | (925) 674-3606 |