Our laundry isn't in a closet, but I like this idea for very narrow storage.
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This might work, with very narrow cabinets.
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Another idea for shallow storage. Might include ironing board.
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Hanging space over washer/dryer. Would not interfere with lights/vent. Another idea is a pulley rigged system, like this: http://pulleymaid.com/unitedstates/classic_clothes_airer.htm
An idea for using it as a linen closet.
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