J
Johnny1
Guest
There are 4840 square yards in an acre so there should be 2420 square yards in .5 of an acre. Pace it out measure length by width and multiply answer should be 2420 if .5 acre beats paying an engineer.
Unless the OP is on mains sewerage (unikely) then there are planning conditions that determine the minimum distance that a septic tank needs to be from the house and the boundaries. To satisfy these conditions you need a half acre.
J.
I got planning no problem on a site of 1/3rd acre with a normal septic tank.