HELP - Insurance requiring Fire Alarm?

[Ryan Randall]

My old insurance just dropped me. Said that our property rebuild costs exceeded their maximum. 

Now, while searching for new insurance through a broker, I'm being told that my building now requires a "Central Station Fire Alarm that reports to a Central Reporting Station".

Is this new requirement normal? Should I try and find another insurance broker? It's wild to me that this is suddenly a requirement.

I own a 4-unit residential property in the seacoast of NH.