What size shed do I need?
The short answer
Lay out what is going inside, add a three-foot walking aisle, then add about 25 percent for what you will accumulate. Most Colorado homeowners are happy with 10x12 to 10x16 for yard gear, and 12x20 or larger once a mower, snowblower, and workbench are involved. Room-by-room sizing examples are in our what size shed do I need guide.
The most common regret we hear is not about color or roof style. It is buying too small. A shed is one of the few purchases where the incremental cost of four more feet is small compared to replacing the whole building in three years.
A simple sizing method
- List the big items: mower, snowblower, bikes, wheelbarrow, ladders, tote shelving, ATV.
- Sketch them on graph paper at scale, then add a 3-foot aisle so you can reach the back wall.
- Add roughly 25 percent for future accumulation.
- Check wall height separately — shelving and a hanging ladder need vertical room, not floor area.
What common footprints hold
- 8x10 / 10x12 — yard tools, a push mower, seasonal totes, bikes. Great small-lot answer.
- 10x16 — riding mower plus tools and shelving with room to move.
- 12x20 — mower, snowblower, workbench, and a real work aisle. The sweet spot for hobbyists.
- 12x24 and up — shop space, side-by-side, or storage plus a finished studio corner.
Do not forget vertical
A hi-wall or Quaker roof adds usable loft and headroom without enlarging the footprint — often the cheapest way to add capacity on a tight lot.
How The Shed Yard helps
Bring us your list and your lot dimensions and we will recommend a size and roof style. Try it yourself in the 3D customizer or see every model on our products page.