If your garage feels cluttered and you’re tired of digging through boxes to find a screwdriver, it might be time to build a proper storage system.

Wall cabinets are one of the best ways to clean up a garage. They keep tools off the floor, protect items from dust, and make everything easier to find. The best part? You can build a solid garage wall cabinet system from plywood for a fraction of what store-bought cabinets cost.

This guide walks you through the full process in plain steps. No complicated terms. No guesswork.

Let’s get started.

Why Build Garage Wall Cabinets From Plywood?

Plywood is strong, affordable, and easy to work with. A single sheet can go a long way.

Here’s why it works so well for garage cabinets:

• It handles weight better than particle board

• It resists warping better than solid wood

• It costs less than pre-made cabinet systems

• You can customize the size to fit your wall exactly

If your garage walls are an odd size, custom plywood cabinets are the smartest option.

Tools and Materials You’ll Need

Before cutting anything, gather your supplies.

Materials:

• 3/4-inch plywood (for cabinet boxes and shelves)

• 1/2-inch plywood (for backs, optional)

• 1×2 or 1×3 boards (for face frames, optional)

• Wood screws (1 1/4″ and 2 1/2″)

• Wall anchors or lag bolts

• Wood glue

• Cabinet hinges

• Handles or pulls

Tools:

• Circular saw or table saw

• Drill and drill bits

• Stud finder

• Level

• Measuring tape

• Clamps

• Sandpaper or orbital sander

If you don’t have a table saw, a circular saw with a straight guide works just fine.

Step 1: Measure Your Garage Wall

Start by measuring:

• Wall width

• Ceiling height

• Distance from floor to where cabinets should begin

Most people install garage wall cabinets about 18–24 inches above a workbench.

Use a stud finder to locate and mark wall studs. This matters later when mounting the cabinets.

Take your time here. Good measurements make everything easier.

Step 2: Plan Your Cabinet Layout

Before cutting plywood, sketch a simple layout.

Decide:

• How many cabinets you want

• Cabinet width (commonly 30–36 inches)

• Cabinet height (typically 24–36 inches)

• Cabinet depth (usually 12–16 inches for garage storage)

For most garages, 15 inches deep is a good balance. Deep enough for storage, but not so deep that they feel bulky.

If you’re building multiple cabinets, keeping them the same size makes installation easier.

Step 3: Cut the Plywood Pieces

Each cabinet box needs:

• 2 sides

• 1 top

• 1 bottom

• 1 back (optional but recommended)

• 1 or more shelves

Example for a 30″ wide x 30″ tall x 15″ deep cabinet:

• Sides: 30″ x 15″ (2 pieces)

• Top & bottom: 28 1/2″ x 15″ (2 pieces)

• Back: 30″ x 30″

Why 28 1/2 inches? Because it fits between the two 3/4-inch side panels.

Measure twice. Cut once.

Step 4: Assemble the Cabinet Boxes

1. Lay one side panel flat.

2. Attach the top and bottom pieces between the sides using wood glue and screws.

3. Pre-drill holes to prevent splitting.

4. Attach the back panel.

5. Add shelves using screws or shelf supports.

Use a square to keep everything straight. If the box isn’t square, the doors won’t hang properly later.

Repeat this process for each cabinet.

Step 5: Mount a Support Ledger Board

Before lifting cabinets onto the wall, install a temporary support board.

Screw a straight 2×4 into the wall studs at the height where the bottom of your cabinets will sit. Use a level to make sure it’s perfectly straight.

This board will hold the cabinet weight while you secure it.

Step 6: Install the Cabinets on the Wall

With help (they’re heavy), lift the cabinet onto the ledger board.

• Align it with wall studs

• Drill pilot holes through the back panel into the studs

• Secure with 2 1/2-inch or longer screws

Install one cabinet at a time. Clamp cabinets together if installing side-by-side, then screw them to each other for a tight fit.

Once secured, remove the temporary ledger board.

Step 7: Add Doors and Hardware

You can build simple slab doors from plywood or buy pre-made cabinet doors.

Basic slab door steps:

• Cut plywood to size

• Sand edges smooth

• Attach hinges

• Mount to cabinet

Install handles or pulls last.

If you want a cleaner look, add a simple face frame made from 1×2 boards around the cabinet front.

Optional: Paint or Seal the Cabinets

Garage cabinets take abuse. A coat of paint or clear sealer helps protect them.

Good options:

• Semi-gloss latex paint

• Oil-based enamel

• Clear polyurethane

Light colors make the garage feel brighter.

How Much Does It Cost to Build Garage Wall Cabinets?

Prices vary by location, but here’s a rough idea:

• 3/4″ plywood sheet: $50–$80

• Hardware and screws: $40–$100

• Paint (optional): $30–$60

You can often build a full wall cabinet system for $300–$600.

Pre-made systems can cost double or triple that.

Tips for a Stronger Garage Cabinet System

• Always anchor into wall studs

• Use 3/4-inch plywood for strength

• Don’t overload shelves

• Add a center divider for cabinets wider than 36 inches

• Keep heavy items on lower shelves

Build it once. Build it solid.

Final Thoughts

Building a garage wall cabinet system from plywood is one of the most practical DIY upgrades you can make. It clears floor space, protects your tools, and makes your garage feel organized instead of chaotic.

The process isn’t complicated. Measure carefully, cut accurately, and secure everything properly to wall studs.

Take your time and focus on getting each step right. Once finished, you’ll have a custom cabinet system built exactly for your space and your needs.

And every time you walk into a clean, organized garage, you’ll be glad you built it yourself.