SInce 400 Houses result in
Level 4 - 76
Level 3 - 116
Level 2 - 128
Level 1 - 80
every number dividable by 4 so every corner around the monument can be build equal

100% coverage for all emergeny services is given if

• Fire protection regulations
  
• Medical specialist support
  
• Centralized biometric database

are present in your ark. All obtainable through research.