Many styles are established, at least in part, by the materials you choose for countertops, floor coverings, and wall and ceiling treatments. Also factor in the finishes on cabinets, fixtures, fittings, and accessories.

Just a few years ago, the average vanity top, usually laminate, included a 4-inch lip on the back. Today's higher backsplashes, however, often feature materials that are found there alone. Geometric or handpainted art tiles are popular choices. Seamless backsplash mirrors are popular, too--but can be tough to keep clean.

Floor choices are increasing. Besides time-tested tile and vinyl, we're seeing more stone used in baths--the result of newly affordable stone-tile offerings and the sealers that protect them. Wood and carpeting are also showing up, especially in detached areas away from direct-splash zones.

For painting walls, both standard treatments and faux finishes are familiar. Other wall options include tile, stone, terrazzo, wood, plaster, wallpaper, upholstery, and glass block.

Beyond aesthetic considerations, you should weigh the physical characteristics of surface materials. Most bathrooms take a lot of wear. Is your countertop choice water resistant, durable, and easy to maintain? Is the floor hard to walk on, noisy, or slippery? Are walls easy to clean? A powder room or master suite might be the place to try delicate materials that would be impractical in a family bath.