Groundwater entering basement floor

Due to town construction, groundwater is being diverted to my basement. Water is coming up through the middle of the floor, as well as entering through the cinderblocks in the front of the house. (they refuse to acknowledge my existence, and yes, I am taking legal action).

In the meantime, I need to fix this problem...I have a sump pump in one corner of the basement that runs continuously, as well as an automatic surface pump in the middle of the basement, which also runs continuously, yet this does not get rid of all the incoming water. In addition, my cement floor is now eroding away, causing the water to enter faster.

I have gotten estimates from 2 different companies that install inside perimeter drains (both are roughly $5k). Will this method solve the problem of water entering the middle of the basement? I have also tried contacting landscape contractors to get estimates on an outdoor solution, yet no one has called me back. Do I need to contact an excavating company? Or some other type of contractor? Also, will digging a perimiter drain Outside the house fix the problem of the water coming in from under the house?

Thanks in advance for any advice as to how I can end this nightmare!
PC

 

An outside perimeter ("French") drain is the solution. You need to run the pipe (solid wall perforated - don't use flexible) so that it is deep enough to intercept the ground water and run it to daylight. Once you have the trench dug then you install gravel, the perforated drain pipe, more gravel and fabric to prevent soil from entering the pipe and blocking it.

This will solve the problem. If you live on a sloping lot, you can probably limit the drain to the top side and out around the 2 (or maybe even just one) adjacent sides. The trick is to get all of the ground water to go out to the bottom side of your property so it never gets to the house.

Of course, your neighbor(s) below will have to do the same........