Much of Ag can sustain as they are pumping ground water like crazy.

That age of a building foundation,clay pipe going into the building form the street,weeping (ground water system) to get water off of the building.How close are the trees and root system and how tall are they??

Park fee's School Fees and any other fee's they can think of.. then you have your building permit fee IE plan check and the actual building permit that is usually 2 to 3k. depending on size.. so all in this can run a low of about 15k to 50 to 70k depending on jurisdictionPerk test is a Peculation of the soil  test  IE  how quick will water be absorbed.. in heavy clay soils this can be an issue along with very high ground water.

if its ground water its presumably just in the basement. 

Depending on the well, it's depth, age and a million other factors, contamination.If it's an old hand dug well, beware, cause you'll be drinking groundwater.

If it isn’t ground water coming up, you should check gutters, and slope away from the house.

It would be nice to find out if there is an ongoing issue, soil issue, ground water issue, etc. prior to making a final decision.Kind regards,Arpad 

Actually, house is sitting very close to the ground water level and nobody knows where the septic is located.

Per day.Headlines indicate:Water stores in California will last only ONE YEAR.Many properties are having collapse of earth due to usage of groundwater.

Rima and I keep people out of trouble with the highly-regulated toxic and hazardous materials - asbestos, lead, VOCs, soil and groundwater contamination, plus indoor air quality and the almost unregulated mold.