It costs about $1.00 per square foot to tent a house for termites. The cost will vary by state but that is the average. Tenting is the fumigation process to get rid of drywood termites. We have a 3,000 foot rental property we purchased and tenting was required before we could complete construction. The tenting we chose is the newer process which is safer than the lethal gas process. Heat is blown into the home and reaches temperatures of 140 to 150 degrees fahrenheit and structural wood reaches 120 degrees. This process takes about eight hours to kill the termites. The home is safe to be occupied the same night. It is also a safer method for concentrated smaller areas instead of the entire structure.