| Business | Phone |
| Arc Maintenance Co North Hills 91343 | (818) 893-8740 |
| Bell Buildign Maintenance Co North Hills 91343 | (818) 891-5645 |
| Martinez Janitorial Svc 16330 Parthenia St, North Hills 91343 | (818) 893-6961 |
| North Hills Janitorial 8405 Orion Ave # 201, North Hills 91343 | (818) 830-7122 |
| Sunset To Sunrise Maintenance North Hills 91343 | (818) 895-3130 |