iIlive in a duplex and planning on redoing the foundation. Do I need to notify my neighbor of the attached duplex? Incase of shifting in the homes.

I would presume you are getting permits for the work you plan to do on your foundation. I would think that a part of the permit process is to notify the neighbor of the work planned. You should go to your town offices and see what is required as a part of the permit process.Once the work starts, your insurance should protect you in the event of damages caused to your home or your neighbor’s as a part of the work. Insurance covers for “sudden and accidental” damage to your home. The liability portion should protect you if your neighbor should sue you for damages. If you and the neighbor have separate insurance policies, and you cause damage to his property then his insurance would most likely be responsible for damages and then they could subrogate against you or the contractor for the damages. As long as you do the work legally, you should be properly protected. However, it is recommended that you hire a contractor to do this work, since they will have a better understanding as to how to do the work with the least likelihood of damages to your property or your neighbor.