Abstract: A retrofit shower system including a shower pan formed of a drain hub having an aperture for receiving plumbing for a drain hole and several separate quadrants. The quadrants are seamed together and seamed to the drain hub to create a shower floor. Each quadrants is formed with support rails on the bottom that get smaller in depth as the support rails get closer to the drain hub. The resulting shower floor has an angle towards the drain hub to allow water to properly drain in the shower. Coved sidewall components are provided including at least two corner-coved walls and at least two coved wall connectors. The sidewall components are seamed to the shower floor. Wall panels and a shower ceiling may also be provided.