This client needed additional storage in their kitchen, and wanted to utilize the dead space under their existing window seat.
I removed the existing drywall and studs, leaving a temporary prop in place to keep the window seat top from sagging.
I built and finished this drawer base in my shop, then slid it into place under the window seat top and secured it to the framing inside. Now, the window seat remains, but provides plenty of storage in the large drawers below.