I just purchased a condo in a high-rise and am hoping to make some master bathroom/closet renovations. The condo layout is such that there is one large bathroom with a full shower/sink/toilet directly parallel to the master bedroom walk in closet which only has a small bathroom with a sink and toilet. My question is... Is it necessary to drill new drain holes in order to put in a second shower in the master closet or can I plum the drain to link to the next door shower drain? This would make things much much easier... If not, generally home much does installing a new drain in a high-rise condo with concrete floors generally run... ballpark? Thanks