I want to buy a house by a lake with a septic system. The house never
had a septic system that was approved. In other words, I can't use the
existing system.

According to the county, I have to find 360 ft of field lines to add
additions to a 2 bedroom house. My field lines have to be 50 ft back
from the lake and 100 ft from a well on a neighbors' property.

My lot is only .4 acre and has a lot of cut/fill areas that are
unapproved. Plus the lot heavily slopes.

In other words . . . I will never have the field lines unless the
neighbor shuts down their well.

Are there alternatives to septic systems that a metro county will
approve near a well and with less field lines? I tried proposing an
aeration system but the county requires the same length of field lines
and distance from the well.