The garage is the room most homes forget. Oil drips, dust, cobwebs, garden soil and boxes that were only going in “for now” build up until there is no room for the car. This guide explains how to deep clean a garage at home, from emptying it to putting things back, with the safety points that matter in a space full of tools and chemicals. Set aside a full day for a typical single garage, and more if it has not been cleared for years.
Before you start
Gather a simple kit:
- a stiff broom and a dustpan
- a wet and dry vacuum, or a household vacuum with a crevice tool
- a bucket, scrubbing brushes and microfibre cloths
- a degreaser for concrete, and cat litter or sawdust to soak up fresh oil
- rubbish sacks and boxes for sorting
- gloves, safety glasses and a dust mask
Then make the space safe:
- open the garage door and any windows for ventilation
- unplug power tools, chargers and any freezer you need to move
- check product labels before you use them, and work in daylight if the lighting is poor
Step 1: clear and sort
Take everything out. It is the only way to reach the floor and walls properly, and it makes you decide what stays. Sort into four piles: keep, donate, recycle and take to the tip. Old paint, motor oil, batteries and garden chemicals should not go in the household bin; take them to a household waste recycling centre, and check first what your local centre accepts.
Step 2: work from the top down
Dust falls, so clean high first:
- brush cobwebs from the ceiling, beams and corners
- dust light fittings and the tops of cupboards and shelving
- wipe shelves and brackets once they are empty
Step 3: the floor
Sweep the whole floor, then vacuum the corners, the edges and any cracks where dust collects. Wash the floor with warm water and a degreaser, scrubbing the dirtiest patches, and rinse well. Leave the door open while it dries.
Step 4: stains on concrete
Concrete is porous, so stains need patience. Treat them one type at a time:
- Fresh oil: cover it with cat litter or sawdust, leave it to absorb, sweep it up, then scrub with degreaser.
- Old oil: apply a concrete degreaser, leave it for the time on the label, scrub and rinse. It may take two or three goes.
- Rust: use a rust remover made for concrete, following the label.
- Paint: scrape off what you can, then use a product suited to the type of paint.
Always test a product on a small, hidden patch first. Never mix bleach with other cleaning products: combined with ammonia or acids it can release harmful gases, and a garage is an enclosed space.
Step 5: walls, door and windows
Wipe the walls with a mild detergent, paying attention to the low splash zone near the floor. Clean the inside of the garage door, its handle and runners, and remove grease from the hinges. Wash the windows and check the draught seals at the bottom of the door, as a worn seal lets in water and leaves.
Step 6: damp, mould and smells
If you find mould or a musty smell, look for the cause before you clean: a leaking gutter, a gap under the door, a cracked window or poor ventilation. Small patches of mould on hard surfaces can be cleaned with a mould and mildew product while you wear gloves and keep the door open. Larger areas, or damp that keeps coming back, are a building problem rather than a cleaning one and need the cause put right.
For lingering smells, airing the garage on dry days and a bowl of bicarbonate of soda or charcoal on a shelf help.
Step 7: putting things back
- Put the things you use most near the door and the rarely used ones high up.
- Keep chemicals on a high shelf or in a locked cupboard, away from children and pets, in their original containers.
- Store anything that can be damaged by damp off the floor, on shelving or in sealed boxes.
- Leave a clear route around the car and to the door.
A quick checklist
- Kit and protective gear ready
- Door open, tools unplugged
- Everything out and sorted
- Ceiling, beams and shelves dusted
- Floor swept, vacuumed and washed
- Stains treated
- Walls, door and windows cleaned
- Damp and mould checked at the source
- Chemicals stored safely, old ones taken to the recycling centre
Help with the rest of the house
A garage clear-out is often part of a wider reset. If the rest of the home needs the same attention, our deep cleaning service covers the jobs a routine visit does not reach. For seasonal reading, see our spring cleaning checklist and our guide to preparing your home for winter.
To talk about a deep clean of your home, call 01483 773531 or send us a message.