Has your neighbor told you he is going to build a runway (it was not
clear from your posting)?

At 1000 to 1500 feet from the threshhold, your home is in a prime
location for CFIT or departure accidents.

At the very least, common courtesty, your neighbor should agree to
angle the runway so it does not point directly at your house.

They should also agree to turn away from your house after liftoff.