| Business | Phone |
| X-R-I Testing Inc 1961 Thunderbird, Troy 48084 | (248) 362-5050 |
| Quality Inspections Inc 2701 Industrial Row Dr, Troy 48084 | (248) 655-0313 |
| Michigan Building Consultants Troy 48083 | (248) 740-9285 |
| H & S Inspection 422 Oliver Dr, Troy 48084 | (248) 362-8141 |