Sink Base Cabinet
Also known as: Sink Base, SB Cabinet
A specialized base cabinet engineered to accommodate a kitchen sink and its plumbing. Sink bases have a false drawer front at the top and an open interior to allow drain pipes and water supply lines. They typically come in 30, 33, or 36-inch widths and may include a tilt-out tray in the false front for sponges and scrubbers.
Specifying this for a job? Captivating Pro members buy at 20–40% off retail and get cut sheets before rough-in.
In practice
Size a sink base about 3" wider than the sink bowl and check the sink manufacturer's stated minimum cabinet width before ordering. The open interior takes the trap, a garbage disposal, and a slide-in organizer.
Common questions
What size sink base do I need for a 33" sink?
A 36" sink base in most cases — the rule of thumb is bowl width plus roughly 3", but always confirm the sink spec sheet's minimum cabinet size.
Why does a sink base have no drawers?
The sink bowl drops into the space where drawers would run, so the top openings get fixed false fronts instead — tilt-out tray kits can turn them into sponge storage.
