garage · 12 min read
One-car garage workshop layout and a honest budget
How a 12×20 bay can hold a car, a folding bench, and a walkway — with planning ranges, not a contractor bid.
By Gary Thomas · Updated 2026-08-01
Affiliate disclosure: links to Lowe’s, Overstock/Beyond, Amazon, and others may earn a commission. Not a lab test. Not a licensed contractor. Full disclosure.
A one-car garage is usually about 12 feet wide and 20 to 22 feet deep. That is enough room for a compact or midsize car or a small workshop — and, with a folding bench and wall storage, sometimes both. This page is a planning sketch for that overlap, not a bid from a licensed contractor and not a remodel I invoiced last month.
I publish Bay One as Gary Thomas. I do not hold a contractor, electrical, or plumbing license. If your bay has a cracked slab, a wet breaker box, or a garage-door spring that is wound and waiting, stop and call the right trade.
Measure before you shop
Tape three things on paper: the interior width and depth, the parked vehicle's length and door swing, and every obstruction (water heater, washer, opener rail, breaker panel). A cabinet that looks modest on a product page can block a driver-side door in a 12-foot bay.
Three zones that actually fit
- Vehicle strip. Park to one side, not dead center, if you want a work aisle. A typical car is about 6 feet wide; that leaves roughly 3 feet per side if you center it, or one usable 4- to 5-foot aisle if you hug a wall.
- Walkway. Keep a 36-inch path from the house door to the overhead door. That is a wheelchair-style planning width, not a code inspection of your garage.
- Fold-away work. A 24-inch-deep bench on the long wall is usable for assembly. If the car still has to sleep here, the bench has to fold or roll.
A budget you can defend
These are typical U.S. retail ranges from browsing public listings, rounded, as of 2026. They are not receipts from a Bay One project and not a promise that your zip code will match.
| Spec | Planning figure |
|---|---|
| Typical one-car bay | 12 × 20 ft (240 sq ft) interior, plus door and opener rail |
| Weekend organize | About $150–$400: hooks, bins, one folding table |
| Usable workshop | About $800–$1,800: folding bench, wall track, LED shop lights on existing fixtures, partial floor tiles |
| Committed setup | About $2,500+: cabinets, fuller floor, better dust control — still not a two-car shop |
| Do not budget here | New electrical circuits, slab work, overhead-door hardware — hire licensed trades |
What I would skip
A full epoxy job in a bay that still sees winter salt and a leaking mower, unless you are ready for prep you cannot fake. A giant stationary table saw on the centerline. A "garage gym plus woodshop plus guest parking" plan that assumes the car lives on the street.
Lighting and storage details live in the flooring, storage, and lighting guide. Kit benches are unpacked in workbench kits.
Related guides
Questions about a layout, not a live electrical panel? Write to Gary Thomas.