How Deep Should a Workbench Be? Picking a Depth You Will Not Regret

For most home garage workshops, a bench depth of 600mm to 750mm hits the sweet spot. That gives you room to lay out a job in front of you without the back of the bench turning into a junk shelf you cannot reach. Go shallower than 450mm and clamping gets awkward; go past 900mm against a wall and anything at the back is effectively lost.

Why Depth Matters More Than People Expect

Bench height gets all the attention, but depth is what decides whether the bench stays usable a year after you build it. Depth controls three things: how far you have to reach, how much of the surface stays clear, and whether you can clamp work down where you actually need it.

Your comfortable reach while standing at a bench is roughly 600mm to 700mm before you start leaning. Anything beyond that you can still touch, but you would not want to work there for an hour. That is why a deep bench does not really give you more working area. It gives you a working strip at the front and a storage strip at the back, whether you planned it that way or not.

Recommended Depths by Type of Work

• 450mm to 550mm: Suits narrow garages and small jobs. Fine for electronics, bike spannering, small assembly and repairs. Too shallow for planing timber or holding anything with overhang.
• 600mm to 750mm: The general purpose range and the one most people should pick. Deep enough to lay out parts, tools and a manual side by side. Still shallow enough to reach the back wall.
• 750mm to 900mm: Useful for woodwork where you need clamp room on both edges, or if the bench sits in the middle of the room and you can work from both sides.
• Over 900mm: Only worth it for freestanding island benches or sheet goods handling. Against a wall it is mostly wasted depth.

Match Depth to the Room, Not Just the Bench

The number that really matters is not the bench depth on its own. It is what you have left over as walkway. In a single garage roughly 2.4m to 2.6m wide, a 750mm bench along one wall leaves you around 1.6m of floor. That sounds generous until a car goes in, or a mower and a bin end up parked there.

Before you commit, mark the depth out on the floor with masking tape and leave it a few days. Walk past it, open the car door next to it, wheel something through. You will know within a week whether 600mm or 750mm is right for your space, and tape is a lot cheaper than a rebuilt bench.

Leave Room for the Vice

A bench vice needs mounting near the front edge so you can work on the piece without the bench top getting in your way, and it needs enough top behind it that the mounting bolts are not right at the edge of your only support. On a shallow bench you end up with the vice hanging over one corner and the whole thing rocking when you lean on the handle.

If a vice is part of your plan, 600mm is a realistic minimum. It gives you roughly 150mm of vice jaw overhang at the front and enough carcass behind to bolt through solid timber into the frame rather than into unsupported top.

Depth and the Back Edge

Most benches end up with a strip at the back holding a battery charger, a roll of tape and three tins of something. That is normal and worth designing for rather than fighting. A useful approach is to size the bench for your actual working depth, then add a shallow raised shelf at the back around 150mm to 200mm deep. The clutter has somewhere to live and it sits above the work surface rather than eating into it.

The alternative, and often the better one in a tight garage, is to keep the bench at 600mm and put everything else on the wall. Pegboard, French cleats or a run of shelving above the bench all keep the surface clear without costing you floor space.

Freestanding Benches Are a Different Calculation

If the bench sits away from the wall and you can walk around it, your reach doubles. You can work comfortably at 900mm to 1200mm deep because the far side is not really far, it is just the other side. This is why traditional woodworking benches are often deeper than garage benches look. They were never pushed against a wall.

The trade off is floor space and clearance. A freestanding bench needs at least 700mm of walkway all round to be worth the setup, and preferably a metre on the working sides. In most single garages that maths does not work out, which is why wall mounted at 600mm to 750mm remains the sensible default.

What About Depth Under the Bench?

Whatever depth you pick for the top, do not fill the entire volume underneath with cabinets. Leave a toe recess at the front, roughly 75mm to 100mm deep and 100mm tall, so you can stand close without your feet hitting the frame. Without it you lean forward all day, and on a deep bench that is exactly what wrecks your back.

Under bench storage also wants to be shallower than the top. Drawers or cupboards set back 50mm or so from the front edge stop you barking your knees and keep the front rail clear for clamping work to the bench edge.

The Short Version

Pick 600mm if space is tight or the bench is mostly for repairs and assembly. Pick 750mm if you have the room and do any woodwork or larger projects. Only go deeper if you can get to both sides. Then add wall storage behind it so the depth you paid for stays clear.