contemporary floor plan by Steven Corley Randel, Architect - general sizing/space requirements for new master bath use as reference. i would switch the tub for a shower and use the old shower space for a bigger linen closet/ bath product storage
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Light grey tile floor running behind bath; then right side exposed brick painted white + chunky wooden shelves above hidden cistern displaying plants & hand towels; left side feature wall of dark grey with zuster cabinet