First of it depends on what type of Termite. I am assuming that it is Subteranium Termites. Most companies treat with either a Liquid Treatment or Bait Stations. The pricing is terminted by the linear feet of your homes foundation. To calculate linear feet add the lenght and width and multiply by 2.0 Example 20ft width + 20ft lenght x 2 = 80 linear feet at $8-15 dollars per foot = $640.00 to $1,200.00.