Drain Tile Requirements in Baltimore City

[Kyle Gregg]

I am working with a GC to put together a scope of work and he mentions that he usually installs a drain tile system in all his rehabs. The house currently does not have a basement drainage system but it looks to be very solid. I see no previous signs of water entry. Is it required? Is it a good idea to install one? ($2900 quote).

This is a rowhome in patterson park, baltimore city maryland. 

Thanks for any input.