The quotation from your selected home renovation company is the most important amount, should you want to continue with their services. On average, the total expense depends on the size of the bathroom itself, all of the chosen materials, and most of the types of fixtures, counters and finishes. A Single bathroom renovation costs range between R15,000 and R55,000 with an average of R35,000 depending on the size of the bathroom but the price will differ from company to company.