| Business | Phone |
| Bromma Building Svc 1717 Solano Way # 30, Concord 94520 | (925) 687-8935 |
| Summit Building Svc 2170 Commerce Ave # H, Concord 94520 | (925) 827-9500 |
| Welcome Building Maintenance 1170 Burnett Ave, Concord 94520 | (925) 288-1911 |
| All American Janitorial Svc 2751 Monument Blvd # 20, Concord 94520 | (925) 798-9764 |
| All American Janitorial Svc Co Po Box 626, Concord 94522 | (925) 680-8663 |
| American Building Maintenance 2000 Clayton Rd, Concord 94520 | (925) 356-0294 |
| Better Living Concord 94520 | (925) 363-5711 |
| Buenos Aires Cleaning Co 2525 Ryan Rd # A, Concord 94518 | (925) 497-7197 |
| Building Services Maintenance 2490 Arnold Industrial Way # G, Concord 94520 | (925) 688-1232 |
| Clean All One Call 1847 Ayers Rd, Concord 94521 | (925) 689-5093 |
| Concar Industries Llc 1717 Solano Way # 31, Concord 94520 | (925) 687-8960 |
| Contra Costa Building Mntnc 3200 Cambridge Pl, Concord 94518 | (925) 687-3655 |
| Contracosta Janitor Svc 5146 Red Oak Dr, Concord 94521 | (925) 798-6905 |
| Ed's Cleaning Svc 4331 Chelsea Way, Concord 94521 | (925) 676-6446 |
| Galaxy Janitorial Svc 1412 Newhall Pkwy, Concord 94521 | (925) 671-2497 |
| Gemini Cleaning Svc 1491 Meadow Ln, Concord 94520 | (925) 288-1529 |
| Golden House Cleaning Concord 94520 | (925) 681-2259 |
| H & R Janitorial Svc 1461 Darlene Dr, Concord 94520 | (925) 687-2188 |
| Ino & Rose House Cleaning Concord 94520 | (925) 689-3630 |
| Integrated Cleaning Solutions Concord 94520 | (925) 288-0919 |
| Lori's Cleaning Svc 2524 Erie Dr, Concord 94519 | (925) 685-2126 |
| Middle Earth Floor Maintenance Concord 94520 | (925) 687-7262 |
| Nas Janitorial Svc 1160 Meadow Ln # 59, Concord 94520 | (925) 349-9905 |
| Perfection Janitorial Svc Concord 94520 | (925) 687-3322 |
| Tailored Building Svc Inc 3565 Clayton Rd # B, Concord 94519 | (925) 676-8872 |
| Unique Building Maintenance Concord 94520 | (925) 687-0502 |