| Business | Phone |
| Security Union Title Insurance 1440 Bridgegate Dr # 300, Diamond Bar 91765 | (909) 859-8930 |
| Fidelity National Title 634 N Diamond Bar Blvd, Diamond Bar 91765 | (909) 612-2900 |
| Financial Title Co 21680 Gateway Center Dr, Diamond Bar 91765 | (909) 861-3793 |
| New Century Title Co 21680 Gateway Center Dr, Diamond Bar 91765 | (909) 612-4250 |