The Cost of Termite Tenting. You really need a detailed step-by-step guide which will walk you through it all. I can’t recommend this enough as it will save you a lot of time and effort, it’s worth investing in this one particular item. As a rough figure, the average house costs around $2,000 to $3,000 for a termite tenting fumigation to be completed. Use this as a guiding principle and shop around for the best offers. However, the cost can depend on a variety of factors: