Yes! I should check more carefully for the conditions of gutters, drain pipes, etc.
But assuming I'm getting water from the hill I'll give you more details about it.
There is a negative hill about 12 feet from the back of the house; there is another negative hill about 5 feet from one side of the house; the other side of the house has a positive hill right next to it. The front of the house is flat.
(See illustrarion below:)
-------------- Negative Hill (~ 1/2 acre long)
(back of the house)
-- postive hill ---House --- negative hill
-------------------- Flat -------------------
The corner of the house that meets these negative hills is the one that leaks. However, to aggraviate the problem an above ground garage is built next to the house, obstructing access to the side of the house where one of the negative hills pours its waters.
To complicate matters more there is a porch on the back of the house and a cistern under it.
Both the garage and the porch may obstruct construction of a french drain (footer drain) around the foundation of the house where both negative hills end.
Do you think that adding surface drainage in this bad corner, such as a catch basin would be a feasible solution?
Any other thoughts will be appreciated.
Thank you very much,
P.S. Sorry I confused french drains with drain pipes. We don't have french drains, we just have drain pipes that take away the water from the gutters far away from the house.