A Kingsport restaurant will be closing its doors permanently at the end of this month.A post from Mama’s House Buffet states that the restaurant’s last day of service will be Monday, Jan. 31.According to restaurant ownership, problems caused by the COVID-19 pandemic have led to the upcoming end of business.Management thanked the restaurant’s employees and loyal customers for years of support in the post.Mama’s House Buffet is located at 2608 N John B Dennis Highway.