A corner sink base is a rarely used type of base cabinet. Sinks are usually placed under either a window or along a pony wall that looks out from the kitchen into a dining or living room. A corner sink base sits in a corner, much like a lazy Susan cabinet does. These sink bases come in two types: either a standard or diagonal model. The standard model is shaped like the letter L, with a 90-degree angle at the center. The diagonal model is wider and is shaped like six-sided diamond.
You can place a kitchen sink into either type of corner sink base. The standard model is narrower, which limits your size options. A standard 22-by-24 inch sink will be too wide to fit the cabinet; instead you must look for a narrower option of 18 inches maximum. You have much more freedom with a diagonal model. A 33-by-22 inch sink will fit into a sink base cabinet that takes up 36 inches on each wall; if you have a larger cabinet that takes up 42 inches, you can increase your sink size to 36- or 38-by-22 inches.
If you must place your sink in the corner of the room, consider installing two separate sinks in the cabinet, rather than a single basin. Install the basins at right angles to each other. This gives you two basins, and both can be 33-by-22 inches. The narrow space between the two sinks can be used for storage or an area for indoor plants.
If you intend to install a single sink in a standard sink base cabinet, you can make it deeper than the standard 8 inches. By placing a 10- or 12-inch-deep sink in the corner, you make up for some of the space you give up with a narrower sink. A lazy Susan is a more efficient use of storage space in a corner base cabinet; if at all possible, try to move the sink to a more standard location.