“MUDROOMS ARE ALMOST AS IMPORTANT as kitchens,” says Treff LaFleche, principal architect at Cambridge-based LDa Architecture & Interiors. When the owners of this North End town house contacted LaFleche, the home lacked a place “where you could drop all of your stuff,” he says. Together with project architect Matt Simitis, LaFleche re-imagined the home’s entry with a handsome new stairway leading to a downstairs mudroom. (They removed the old basement stairway at the back of the house.) The new mudroom has plenty of storage tailored to the homeowners’ needs — and subtle elegance, too.