| Business | Phone |
| Acu-Vac Power Sweeping 1130 Landini Ln, Concord 94520 | (925) 825-0532 |
| Bls Contractors 180 Mason Cir # B, Concord 94520 | (925) 825-8212 |
| Ameritac Inc 2799 Mount Hood Cir, Concord 94519 | (925) 685-7652 |
| Canyon Place Office Park 1800 Sutter St, Concord 94520 | (925) 602-1260 |
| Contra Costa Property Svc 5202 Valmar Dr, Concord 94521 | (925) 687-5827 |
| East Bay Property Management 2701 Crescent Dr, Concord 94520 | (510) 909-1638 |
| Golden Property Management 1675 Garnet Ln, Concord 94519 | (925) 691-3840 |
| Madison Management 901 Sunvalley Blvd, Concord 94520 | (925) 676-6187 |