| Business | Phone |
| Advantage Civil Engineering 110 E Grand River Ave, Howell 48843 | (517) 545-4141 |
| Gideons International 3121 E Grand River Ave, Howell 48843 | (517) 546-4836 |
| Professional Engineering Assoc 2900 E Grand River Ave, Howell 48843 | (517) 546-8583 |