Cultured Marble Shower Walls Price. Cultured marble shower walls cost an average of 1,850 to install but vary from 700 to 2, labor makes up about 150 of the total but varies depending on whether you need additional components such as a shower pan or tub. Materials alone cost roughly 1,700 for a 70squarefoot includes both a 3 by 4 by 7 feet stand up shower or a ...