| Business | Phone |
| Blackhawk Architects 78 N Main St, Fond Du Lac 54935 | (920) 922-6420 |
| Design Ii Architect 885 Western Ave 200, Fond Du Lac 54935 | (920) 922-2383 |
| Excel Engineering Inc 100 Camelot Dr, Fond Du Lac 54935 | (920) 926-9800 |
| Ptd Inc 55 S Main St, Fond Du Lac 54935 | (920) 923-0203 |
| Thomas Design Inc N9568 Winnebago Park Rd, Fond Du Lac 54935 | (920) 922-7131 |
| Tom Meiklejohn Architects 113 S Main St, Fond Du Lac 54935 | (920) 923-3163 |