| Business | Phone |
| Charles Simms Development Mason 45040 | (513) 754-8440 |
| Duke Management 4705 Duke Dr, Mason 45040 | (513) 398-5840 |
| Equity Residential Development 3397 Ravine Pl, Mason 45040 | (513) 336-8942 |
| River Iii Development Po Box 1017, Mason 45040 | (513) 398-3181 |