Shed size · 18 sq ft
What fits in a 3x6 shed?
A 3x6 shed has 18 sq ft of floor. Drawn to scale with a clear aisle, it holds a push mower but not a shelving unit, and it is too small for a lawn tractor. Kits this size run $140 to $785 on Amazon.
A 3x6 is a reach-in storage unit rather than a walk-in shed: at 18 sq ft there is no room for an aisle, so everything is loaded and unloaded through the doors. Below, two common loads are drawn to scale on a 3x6 floor, so you can see what actually fits once you leave yourself a way in.
What fits in a 3x6 shed, drawn to scale
How many of each item fit in a 3x6?
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) | none |
| Zero-turn mower (48 to 54 in deck) | none |
| Push mower (handle folded) | 1 |
| Two-stage snow blower | 1 |
| Wheelbarrow | 1 |
| Adult bike (on the floor) | 1 |
| Trash or recycling can (96 gal) | 2 |
| Gas grill (off-season) | 1 |
| Shelving unit (18 x 48 in) | 2 |
| Workbench (2 x 6 ft) | 1 |
| Kayak (floor) | none |
Is a 3x6 shed big enough for a riding mower?
No. A 42 in lawn tractor parks at about 4.5 x 6 ft and needs a clear aisle to drive in and a door at least 5 ft wide. A 3x6 cannot give it both. For a ride-on mower, look at an 8x10 with double doors or larger.
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 3x6 shed cost?
We track 4 real 3x6 kits, from $140 to $785. At the measured median price per square foot for each material, 18 sq ft works out like this:
| Material | Low (10th pct) | Median | High (90th pct) |
|---|---|---|---|
| Resin (HDPE) | $216 | $327 | $539 |
| Vinyl (PVC) | $234 | $364 | $479 |
| Steel | $55 | $94 | $237 |
| Wood | $183 | $375 | $593 |
Kit prices only. Budget about $94 for a 4 in gravel pad, around 4 anchors, and fit-out on top. The shed cost calculator totals it for your material and foundation.
3x6 shed kits on Amazon
Spread across the price range, cheapest first.
Prices change often; the button shows today's price on Amazon.
Every 3x6 kit we track
| Kit | Footprint | Material | Floor | Price |
|---|---|---|---|---|
| Grovellis 6 x 3 FT Trash Can Storage Shed | 3 x 6 ft | Resin (HDPE) | not stated | $140 |
| Devoko Outdoor Storage Shed 5.8 x 3.3 FT Metal Trash Shed | 3.3 x 5.8 ft | Steel | not stated | $160 |
| Keter Factor 6x3 Outdoor Storage Shed Kit-Perfect to Store | 3 x 6 ft | Resin (HDPE) | not stated | $560 |
| Suncast Everett 6x3 ft Vertical Storage Shed | 3 x 6 ft | Resin (HDPE) | included | $785 |
Want a shortlist instead of the full table? See the best 3x6 sheds at three budgets.
What foundation does a 3x6 shed need?
Most resin and steel kits want a flat, level, well-drained base a little larger than the shed. For a 3x6, that is a 5 x 8 ft gravel pad: about 0.8 tons of crushed stone at 4 in deep, or 1.1 tons at 6 in. A 4 in concrete slab takes 0.24 cubic yards (12 bags of 80 lb mix), and a paver base takes about 11 pavers at 16 in. Full quantities and costs are on the 3x6 shed foundation page.
Does a 3x6 shed need a permit?
At 18 sq ft a 3x6 is exempt by size under all three common thresholds. 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 3x6
- 4x4 shed (16 sq ft, one step smaller)
- 4x6 shed (24 sq ft, one step larger)
- 4x6 shed (24 sq ft)
- 5x6 shed (30 sq ft)
- 6x6 shed (36 sq ft)
Fit out a 3x6
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 3x6 shed?
A 3x6 shed is 18 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 3x6 shed?
No. A 42 in lawn tractor parks at about 4.5 x 6 ft and needs a clear aisle to drive in and a door at least 5 ft wide. A 3x6 cannot give it both. For a ride-on mower, look at an 8x10 with double doors or larger.
Do I need a permit for a 3x6 shed?
At 18 sq ft a 3x6 is exempt by size under all three common thresholds. 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 3x6 shed?
With a 1 ft border on every side, a 3x6 shed sits on a 5 x 8 ft pad. At 4 in deep that is 0.54 cubic yards, about 0.8 tons of crushed stone including 10 percent for compaction. At 6 in, for soft or wet ground, order 1.1 tons. Lay weed fabric first and frame the pad with treated timber.
How much does a 3x6 shed cost?
The 4 3x6 kits in our catalog run from $140 to $785. Add about $94 for a gravel pad, $48 or so for anchors, and $150 or more for shelving, a light and a lock. Prices change often, so check the live price before budgeting.
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.