| Business | Phone |
| Action Janitorial Svc 27 Vista Terr, Guelph N1E 1A2 | (519) 821-3380 |
| Alpine Janitorial Svc 63 Algoma Dr, Guelph N1E 1C8 | (519) 824-8938 |
| M'Clean Maintenance Ent Ltd 12 Bonar Pl, Guelph N1H 8M3 | (519) 763-1812 |
| Owen Maintenance Ltd 12 Ferman Dr, Guelph N1H 7E1 | (519) 824-1431 |
| Rash Janitorial Svc 33 Havelock St, Guelph N1E 4G6 | (519) 837-0054 |
| Royal City Janitorial Svc 438 College Ave W, Guelph N1G 1T4 | (519) 824-6566 |
| Total Janitorial Svc 78 Christine Dr, Guelph N1H 6J2 | (519) 767-1711 |
| United Building Maintenance 27 Cardigan St, Guelph N1H 7V6 | (519) 821-9626 |
| Canclean System 35 Freshmeadow Way, Guelph N1K 1R9 | (519) 836-7212 |