The first step is to get an inspector out there to determine what exactly is causing the problem.  You may also need to get your soil tested.  Prices for both of these services start at $300 each and go up from their depending on how how complex the problem is.

A small crack in a concrete slab foundation can cost about $600 on average to repair.  But if you have cracked drywall in every room in your house, you do not have a small foundation problem.

The soil under your home may be shifting due to changes in weather conditions in your area and causing major foundation problems.

Foundation repair contractors may need to install piers that anchor down your home into stable soil.  These can cost around $2000 on average.

This can put your total expenses up to almost $9000.  Your prices will vary based on a variety of factors, depending on how much work is required, depending on how much labor charges are, and building permits.

Your costs can vary from contractor to contractor.  Make sure you get several quotes before you decide.  Check out reviews and references, make sure the company is licensed, bonded, and licensed in your state.

Also check with the local better business bureau for any complaints about that company.

Home foundation repairs are a necessary evil.  There are high costs which you may want to put off for a later date.  However, the sooner you repair the problems, the less it will cost you in the long run.

The longer you wait, the more the house can shift and settle and cause further damage which will end up costing you more money to fix.