Drain Pipe in backyard

My brownstone is almost 100 years old, and my neighbors attached bdlg. is the sister to mine. Bdlgs. were once owned by same owner who put the drain pipe for my bdlg on my neighbors. My neighbor is now asking me to move the drain pipe (the one that leads from the roof to whatever source) because he plans renovations. Sounds costly, & after 100 years why now? Do I have to?

By baseball mom | 10/14/2008 11:42 AM