You do not own the airspace above your house. As long as it is legal
for him to have a runway on his property you are out of luck.


In Benton County Oregon, the neighbors have considerable say in a situation
like this if the proposed use is on a list of conditional uses allowed on the
particular zoning of the land. Getting a conditional use permit requires the
county to notify and collect data from all the neighbors, then develop a plan
to mitigate concerns, or deny the application if they don't see a way to keep
the peace.

I think the operative word is to find out if the airstrip is a totally allowed
use or if some conditions or permit process is required in your county.

good luck,
tom