Here’s some outside-the-box thinking: Not all of lower cabinets must be the standard 24-inch depth. Most cabinet lines (even stock cabinets from big box stores) also come in a 12- or 15-inch depth usually used for upper cabinets.Using slimmer lower cabinets for one area has its advantages. It opens a bit more floor space, which can make a big difference in a tight kitchen.It also reduces storage slightly, but often the backs of deep cabinets are hard to reach anyway, so the shallower cabinets can be just right for everyday items.