The cost to build a tennis court ranges from $20,000 for a basic court to as much as $200,000 for an elite playing area, but most homeowners pay between $5,200 and $11,000 for the project. Resurfacing a tennis court costs between $4,000 and $15,000 depending on the age, condition and size of the surface.
https://www.improvenet.com/r/costs-and-prices/cost-of-tennis-court