| Business | Phone |
| Grand River Development 2108 Orchard Dr, Dubuque 52001 | (563) 557-8612 |
| Real Estate Developers 1660 Embassy West Dr 250, Dubuque 52002 | (563) 556-1188 |
| Tamarack Business Park 10362 Stonewood Dr, Dubuque 52003 | (563) 557-8730 |
| Tri State Development Co 129998 English Mill Rd, Dubuque 52003 | (563) 557-3820 |
| Westmark Development 4050 Westmark Dr, Dubuque 52002 | (563) 589-1100 |