A gravel shed base is a level timber frame filled with about 4 inches of compacted, angular crushed stone over landscape fabric. Make it a foot bigger than the shed on every side. It drains better than a slab, costs less than half as much, and you can build it with hand tools and a rented compactor.
Gravel works for most kit sheds up to about 12×10 ft on reasonably flat ground. If you're putting up a heavy workshop with a ride-on mower inside, or your ground slopes more than about a foot across the pad, read the FAQ at the end first.
Materials and tools
Quantities are for an 8×10 ft shed on a 10×12 ft pad. Scale them up or down by the pad's area.
- 4×6 ground-contact pressure-treated timber2 at 12 ft, 2 at 10 ft
- ½-inch rebar stakes, 24 in long8
- Structural timber screws, 6 to 8 in1 box, 8 needed
- Woven landscape fabricAbout 130 sq ft
- ¾-inch crushed angular stone (often sold as #57)About 2.5 tons
- Tools you probably ownTape, string line, stakes, spade, rake, 4 ft level, drill
- Tools to rent or borrowPlate compactor (or a hand tamper), sledgehammer
The eight steps
Check the rules, then pick the spot
Look up your local setback and permit rules before you dig; many places let a small shed go without a permit but still set a distance from the boundary. Call your utility-locating service (811 in the US) so you know where the cables and pipes run. Choose ground that doesn't collect puddles, and leave at least 2 ft around the shed so you can reach the walls to paint them.
Mark out the pad, a foot bigger than the shed
For an 8×10 shed, mark a 10×12 rectangle with stakes and string. Square it by measuring both diagonals: when they match, the corners are square.
Leaving a foot of stone around the shed stops rain splashing mud up the walls and gives you somewhere dry to stand.
Strip the turf and dig down about 4 inches
Remove grass, roots and soft topsoil until you reach firm ground. Rake the bottom roughly level. You don't need to dig deeper than the frame; it's the compacted stone, not depth, that does the work.
Build and level the timber frame
Lay the 4×6s in the trench, screw the corners together, and check it's level along every side and across both diagonals. Pack soil under low spots or scrape out high ones. Drill a hole near each corner and halfway along each side, then drive a rebar stake through each into the ground.
On a gentle slope, keep the uphill side at ground level and stack a second course of timber on the downhill side.
Lay landscape fabric
Line the frame with woven fabric, overlapping joins by a foot and running it a few inches up the inside of the timbers. It keeps weeds down and stops the stone sinking into the soil.
Add stone in 2-inch layers and compact each one
Spread the first 2 inches, dampen it lightly, then make two or three passes with the plate compactor. Repeat for the second layer. Angular stone locks together when compacted; round pea gravel never does, which is why it isn't used here.
Screed it flat and check again
Drag a straight 2×4 across the top of the frame to level the stone, filling dips as you go. Finish with the stone flush with the top of the timber, then check with your level in several directions.
Set the shed
Most kit sheds sit straight on the stone or on the treated bearers supplied with the kit. Keep the floor clear of the frame edge so air can move underneath, and fit gutters or a water butt so roof water lands away from the pad.
Hand tamper or plate compactor?
For a 10×12 pad, renting a plate compactor for half a day is quicker and gives a firmer base. If you'll do more paths and patios later, a steel hand tamper with an 8×8 in head is a cheap tool to own. This box shows where a recommended product link would sit; it is a placeholder, not a real recommendation.
Example product linkWhat it costs
| Item | Quantity | Example cost |
|---|---|---|
| 4×6 treated timber | 4 lengths | $120 |
| Crushed stone | 2.5 tons | $115 |
| Stone delivery | 1 load | $75 |
| Plate compactor rental | Half day | $65 |
| Rebar stakes | 8 | $28 |
| Landscape fabric | 1 roll | $25 |
| Timber screws | 1 box | $18 |
| Total | $446 |
These are Shed World planning estimates in US dollars for 2026, not quotes. Stone is the price that moves most: a local quarry can be half the garden-centre price per ton, but check the delivery charge.
How gravel compares with other bases
Show these numbers as a table
| Base type | Example cost |
|---|---|
| Timber skids on blocks | $300 |
| Gravel pad, DIY | $450 |
| Plastic grid with gravel | $520 |
| Paver base, DIY | $900 |
| Concrete slab, DIY | $1,100 |
| Concrete slab, contractor | $2,000 |
Questions people ask
How deep should a gravel shed base be?
About 4 inches of compacted stone suits most kit sheds on firm soil. On soft clay, or under a heavy shed, go to 6 inches and use a deeper frame.
Can I use pea gravel?
Not for the base. Pea gravel is round, so it rolls and shifts under load. You want angular crushed stone that locks together when you compact it.
Do I really need the timber frame?
Yes. Without it the stone spreads at the edges and the corners of the shed slowly drop. The frame is also what makes it easy to get the pad level.
My garden slopes. Will gravel still work?
Up to about a foot of fall across the pad, build the frame up on the downhill side with extra courses of timber. Steeper than that, a retaining wall or a raised deck on posts is the better job.
How long does a gravel base last?
With ground-contact timber and fabric under the stone, it should outlast the shed. Top it up with a bag of stone if a corner settles in the first winter.