| Business | Phone |
| Ideal Van Go 1231 Diamond Way # A, Concord 94520 | (925) 429-1410 |
| Taki Usa 1390 Willow Pass Rd # 350, Concord 94520 | (925) 680-5100 |
| Ampko Heating Air Conditioning 1936 Palo Verde Dr, Concord 94519 | (925) 687-1409 |
| Cip Heating & Air Cond 1650 Pine St, Concord 94520 | (925) 427-5103 |
| Northwest Pacific 4740 East Second St, Concord 94520 | (925) 686-2123 |
| Rudy's Service 2812 Clayton Rd, Concord 94519 | (925) 798-1219 |
| Sun Mechanical Contractors Po Box 21671, Concord 94521 | (925) 827-4363 |