Violation of Residential restrictions

A neighbor who recently moved to the neighborhood is building a "game room", that violates the DECLARATION OF COVENANTS, CONDITIONS AND RESTRICTIONS FOR HIGH COUNTRY, SECTION III, recorded with the Williamson county clerck records under document# 9537178 (or online 1995037178) which establishes under Part A-1: Land Use and Building Type: "No lot shall be used except for residential purposes. No building shall be erected, altered, placed, or permitted to remain on any lot othere thatn one detached single-family dwelling not to exceed two (2) stories in heightn and a privated garage for not less than two (2) nor more than three (3) cars."
It's an eyesore and it's decreasing the value of our properties.
I already reported it to the city and county.
What can I do? Currently there is not a HOA - Is this your question? Add additional information