How to assemble a garage storage cabinet

A garage cabinet is usually a steel or heavy-duty board carcass with lockable doors, adjustable shelves and levelling feet for uneven concrete. Garage floors slope towards the door, so levelling it properly and fixing it to the wall are what keep the doors closing and the cabinet standing.

Time
about 1 h 30 min
Difficulty
Moderate
People
2 people
Steps
7

Tools needed

  • Cross-head screwdriver
  • Spanner or socket set
  • Spirit level
  • Drill and masonry bits
  • Work gloves

Parts to check first

Before you start, lay everything out on a soft surface (the flattened box works) and check it against the parts list in your manual.

  • Side, top, bottom and back panels
  • Two doors with hinges and lock
  • Adjustable shelves and shelf clips
  • Levelling feet
  • Bolts, nuts and wall brackets

Step by step

  1. Step 1: Wear gloves when unpacking; pressed steel panels can have sharp edges and corners.

  2. Step 2: Bolt the bottom panel to both sides with the levelling feet already screwed into the base.

  3. Step 3: Add the top and back panels, leaving the nuts finger tight until every panel is in place, then tighten from the bottom up.

  4. Step 4: Stand the cabinet against the wall and adjust the levelling feet until it is level side to side and front to back.

  5. Step 5: Fix the wall brackets into masonry with suitable plugs and screws, or into studs on a timber wall.

  6. Step 6: Hang the doors on their hinges and adjust them until they meet evenly and the lock catches.

  7. Step 7: Clip the shelves in at the heights you need, keeping the heaviest items on the lowest shelf.

Common mistakes

  • Levelling with packing under one corner instead of the feet, so the cabinet rocks later.
  • Tightening each panel as it goes on, which prevents the next panel lining up.
  • Storing paint tins or tools high up, making the cabinet top-heavy.

Safety notes

  • Fix the cabinet to the wall; a full steel cabinet can fall with great force.
  • Store flammable liquids and chemicals as their labels direct, and keep the cabinet locked if children can reach it.

This is general guidance for this type of product. Your product's own manual comes first: follow its order, fittings and torque values where they differ from this page.

Updated 2026-09-30