sadscott, the first thing that must be determined is, whose responsibility it is to fix the problem. Is it the builder who provides the warranty? Is it the city responsibility because the wet spot is on the easement, or is it your responsibility? Certainly, any informed buyer is not going to purchase a pig in a poke, and with the real estate disclosure laws currently in force, all potential buyers must be informed of the problem.
Once responsibility is determined, the problem must be defined. Then the correct solution can be determined.
John Aldrich (Septic Tank Yank)
Septic System Consultant
Timnath, Colorado