Shed size · 180 sq ft
What fits in a 10x18 shed?
A 10x18 shed has 180 sq ft of floor. Drawn to scale with a clear aisle, it holds a lawn tractor, a snow blower, a wheelbarrow, a workbench, 2 shelving units, and it can take a 42 in lawn tractor if the door is at least 5 ft wide. Kits this size cost about $3,272 in resin or $945 in steel at median prices.
A 10x18 is a large shed at 180 sq ft: space for a ride-on mower, a snow blower and a workbench at the same time, which is why it is the size most people wish they had bought. Below, two common loads are drawn to scale on a 10x18 floor, so you can see what actually fits once you leave yourself a way in.
What fits in a 10x18 shed, drawn to scale
How many of each item fit in a 10x18?
Each row is that item on its own, packed flat on the floor with a clear aisle kept from the door. Hanging bikes and stacking bins beat these numbers; parking a mower across the aisle does not count.
| Item | Fits |
|---|---|
| Riding mower / lawn tractor (42 in deck) | 5 |
| Zero-turn mower (48 to 54 in deck) | 3 |
| Push mower (handle folded) | 12+ |
| Two-stage snow blower | 8 |
| Wheelbarrow | 8 |
| Adult bike (on the floor) | 10 |
| Trash or recycling can (96 gal) | 12+ |
| Gas grill (off-season) | 10 |
| Shelving unit (18 x 48 in) | 12+ |
| Workbench (2 x 6 ft) | 10 |
| Kayak (floor) | 6 |
Is a 10x18 shed big enough for a riding mower?
Yes. A 42 in lawn tractor (about 4.5 x 6 ft parked) fits in a 10x18 with room to walk past it. The real test is the door: you need at least 5 ft of clear opening, so check the kit's door spec before the footprint.
Not sure about your own mix of gear? The shed size calculator adds up every item's footprint, multiplies by 1.5 for aisles and reach, and names the smallest standard size that works.
What does a 10x18 shed cost?
No kit in our catalog is exactly 10x18, which is common for this size: manufacturers cluster around 6x8, 8x10 and 10x12. At the median price per square foot we measured for each material, 180 sq ft works out like this:
| Material | Low (10th pct) | Median | High (90th pct) |
|---|---|---|---|
| Resin (HDPE) | $2,160 | $3,272 | $5,388 |
| Vinyl (PVC) | $2,338 | $3,642 | $4,794 |
| Steel | $555 | $945 | $2,370 |
| Wood | $1,828 | $3,750 | $5,929 |
Kit prices only. Budget about $265 for a 4 in gravel pad, around 8 anchors, and fit-out on top. The shed cost calculator totals it for your material and foundation.
Kits closest to 10x18
Nearest real footprints in our catalog.
Prices change often; the button shows today's price on Amazon.
Closest kits to 10x18
| Kit | Footprint | Material | Floor | Price |
|---|---|---|---|---|
| Polar Aurora 12X14 FT Metal Outdoor Storage Shed with Window | 12 x 14 ft | Steel | not stated | $430 |
| Aoxun 14x12 FT Outdoor Storage Shed with Lockable Double Doors | 12 x 14 ft | Steel | not stated | $510 |
| AMERLIFE 10x16x7 FT Outdoor Storage Shed | 10 x 16 ft | Steel | not stated | $900 |
| Arrow Shed Elite 14' x 14' Tall Outdoor Steel Storage Shed | 14 x 14 ft | Steel | not stated | $2,055 |
| Arrow Shed Elite 12' x 16' Tall Outdoor Steel Storage Shed | 12 x 16 ft | Steel | not stated | $2,221 |
| Handy Home Products Fairfax 10x20 DIY Wooden Storage Shed | 10 x 20 ft | Wood | not stated | $4,518 |
What foundation does a 10x18 shed need?
Most resin and steel kits want a flat, level, well-drained base a little larger than the shed. For a 10x18, that is a 12 x 20 ft gravel pad: about 4.6 tons of crushed stone at 4 in deep, or 6.8 tons at 6 in. A 4 in concrete slab takes 2.44 cubic yards (110 bags of 80 lb mix), and a paver base takes about 107 pavers at 16 in. Full quantities and costs are on the 10x18 shed foundation page.
Does a 10x18 shed need a permit?
At 180 sq ft a 10x18 is exempt only where the 200 sq ft IRC exemption is adopted unamended. Height limits (often 10 to 12 ft at the peak), setbacks of 3 to 5 ft from property lines and HOA covenants apply at any size, and wiring always needs an electrical permit. Run your numbers through the permit size checker, then check your local code.
Sizes next to a 10x18
- 12x14 shed (168 sq ft, one step smaller)
- 12x16 shed (192 sq ft, one step larger)
- 10x10 shed (100 sq ft)
- 10x12 shed (120 sq ft)
- 10x14 shed (140 sq ft)
- 10x16 shed (160 sq ft)
- 10x20 shed (200 sq ft)
- 12x18 shed (216 sq ft)
Fit out a 10x18
Wall storage is how a small floor holds more than the table above says.
Prices change often; the button shows today's price on Amazon.
Frequently asked questions
How many square feet is a 10x18 shed?
A 10x18 shed is 180 square feet of nominal floor area. Usable floor is a little less, because kit dimensions are usually measured at the roof or outside the walls, and resin and steel walls take up floor on every side. Compare the interior dimensions in the kit's spec sheet before you commit, especially if a mower or workbench needs every inch.
Can a riding mower fit in a 10x18 shed?
Yes. A 42 in lawn tractor (about 4.5 x 6 ft parked) fits in a 10x18 with room to walk past it. The real test is the door: you need at least 5 ft of clear opening, so check the kit's door spec before the footprint.
Do I need a permit for a 10x18 shed?
At 180 sq ft a 10x18 is exempt only where the 200 sq ft IRC exemption is adopted unamended. The International Residential Code exempts one-story storage sheds up to 200 sq ft, but many towns lower that to 120 or 100 sq ft, and setbacks, easements, HOA rules and any electrical work apply at every size. Check your local code before you order the kit.
How much gravel do I need for a 10x18 shed?
With a 1 ft border on every side, a 10x18 shed sits on a 12 x 20 ft pad. At 4 in deep that is 3.26 cubic yards, about 4.6 tons of crushed stone including 10 percent for compaction. At 6 in, for soft or wet ground, order 6.8 tons. Lay weed fabric first and frame the pad with treated timber.
How much does a 10x18 shed cost?
No kit in our catalog is exactly 10x18. At the median kit prices we measured, 180 sq ft costs about $945 in steel, $3,272 in resin and $3,750 as a wood kit, before a foundation of about $265 in gravel.
This page is researched guidance, not professional engineering, legal or building-code advice. Sizes, loads and permit rules vary by product and by town: check your local code and the kit manufacturer's instructions before you build.