Even though these was just the headquarters of the Imperial Colony Defense Forces, the security was top-notch, like in all of the other military facilities and installations of the Eternal Empire of the Asurya.
It was a sprawling, high-security military complex that served as the nerve center of all planetary defense operations. It was a towering, fortified structure designed for both strategic command and direct military engagement in the event of an invasion.
Because of the militaristic nature of the Eternal Empire of the Asurya, this wasn't really much because even the private estates of the Imperial citizens were built as personal mini fortresses...
Everything ranges from ordinary houses and condos to mansions. Every single building was built for security and defensive purposes at first, so in the case of a full-blown planetary invasion, every building could be turned into a defensive fortress.