Under-Sink Cabinet – Custom Storage for a Tricky Space

Article 85: Under-Sink Cabinet – Custom Storage for a Tricky Space

By: A Woodworker Who Measures Twice and Builds to Fit the Weirdest Angles

Many sinks leave dead space below due to plumbing. A custom-fit cabinet adds usable storage without interfering with pipes.

Materials

• 3/4" plywood (birch or maple): 1 full sheet

• 1/4" plywood (back): 24" × 30"

• Edge banding or hardwood strips

• Euro-style hinges (2)

• Magnetic door catches

• Wood glue, screws

Tools Needed

• Circular saw or table saw

• Drill and bits

• Kreg pocket hole jig (optional)

• Jigsaw (for cutouts)

• Measuring tape

• Clamps

Steps

1. Measure Sink & Plumbing Layout

   • Identify clearances for traps and hoses. Sketch layout accordingly.

2. Cut Case Panels

   • Sides: 24" H × 18" D

   • Bottom: 18" D × 28" W

   • Top and Rails: leave center open for plumbing

3. Cut Notches for Pipes

   • Use a jigsaw to notch or cut access holes as needed.

4. Assemble Case

   • Glue/screw panels. Add back panel and reinforce corners.

5. Build and Mount Doors

   • Simple shaker doors from 1×3 or use plywood with edge trim.

6. Finish

   • Paint or clear coat. Mount with hinges and attach magnetic catch.

Diagram – Cabinet Face View

  +--------------------------+
  |  [  Door  ]  [  Door  ]  |
  |                          |
  |    Plumbing Cutouts ↓    |
  +--------------------------+