The kitchen is often the most expensive room to renovate in a home, yet it remains a worthwhile investment, an expert has said.Kitchen designer Angela Grimm told Bnd.com that an effective redesign is an attractive draw for future buyers.By the time you put in new countertops and cabinets, add under-cabinet lighting and electrical outlets, move the refrigerator (that means plumbing has to move) and more, youve got quite a project ... but a great kitchen can sell a house, she said.Ms Grimm identified some of the current trends in kitchen design, saying that kitchen islands were becoming increasingly popular, with many homeowners inclined to dress them up like attractive pieces of furniture.In addition, she told the news provider that countertops in kitchen sink areas are now a big consideration in kitchen design. She said that granite is a favoured style, offering depth and movement to a kitchen while quartz has a more even look.According to a recent report on interior design trends by QMI Agency, reflective surfaces are also becoming popular in kitchens as homeowners target looks of understates elegance.