How Deep Should a Gravel Shed Base Be?
Getting the depth right matters more than the stone you pick. Gravel for shed base work needs enough depth to provide drainage, prevent settling, and create a level foundation. The right depth depends on your shed size, soil conditions, and what you'll store inside.
| Shed Type | Recommended Depth | Perimeter Overhang | Total Pad Dimensions |
|---|---|---|---|
| Small shed (under 80 sq ft) | 4 inches | 6–12 inches | Shed + 1–2 ft total |
| Standard shed (80–150 sq ft) | 4–6 inches | 12 inches | Shed + 2 ft total |
| Large shed / workshop (150+ sq ft) | 6 inches | 12–18 inches | Shed + 2–3 ft total |
| Heavy equipment storage | 6–8 inches | 12–18 inches | Shed + 2–3 ft total |
Best Gravel for Shed Bases
Good gravel for shed base pads compacts well, drains water, and stays level under weight. Here are the recommended materials:
Crushed Stone #57
- Angular — compacts into firm, level pad
- Excellent drainage prevents rot
- Industry standard for foundations
- Affordable ($20–50/ton)
- Needs proper compaction equipment
- Coarser surface than crusher run
Crusher Run
- Compacts to near-solid surface
- Contains stone dust — binds tightly
- Most affordable ($20–35/ton)
- Creates very stable foundation
- Less drainage than clean stone
- Can be dusty until fully compacted
Gravel Needed for Common Shed Sizes
Quick reference for the most popular shed dimensions. All estimates include a 12-inch perimeter overhang and 4 inches of crushed stone (1.5 tons per cubic yard), before the 10% ordering allowance:
How much gravel for a 10×12 shed base?
Without overhang (not recommended): 1.5 cu yd → 2.2 tons crushed stone
With 12" overhang (recommended): pad = 12×14 ft → 2.1 cu yd → 3.1 tons
Order quantity: +10% waste → about 3.4 tons (3.6 tons if you allow 15% for compaction)
How to Calculate Gravel for a Shed Base
Follow these steps to calculate exactly how much gravel your shed foundation needs. The calculator above handles all the math — including perimeter overhang.
Measure your shed footprint
Measure the length and width of your shed in feet. Check your shed manual or measure the floor frame. Standard sizes: 8×10, 10×12, 12×16 ft.
Shed area = Length × Width
Add perimeter overhang
Add 12 inches (1 foot) to each side for the gravel pad to extend beyond the shed. This creates a drainage buffer. For example, a 10×12 shed becomes a 12×14 ft gravel pad.
Pad length = Shed length + 2 ft Pad width = Shed width + 2 ft
Calculate cubic yards
Multiply the pad area by the gravel depth (in feet), then divide by 27. For a 12×14 ft pad at 4 inches deep: 12 × 14 × 0.333 ÷ 27 = 2.07 cubic yards.
Cubic yards = (Pad length × Pad width × Depth in ft) ÷ 27
Convert to tons
Multiply cubic yards by the material density (1.5 for crushed stone). Add 10% for compaction and leveling. Shed bases need proper compaction — rent a plate compactor for best results.
Tons = Cubic yards × 1.5 Order qty = Tons × 1.10
Gravel Pad for Shed Cost (2026)
A gravel pad for a 10×12 shed costs about $300–$570 if you build it yourself, or $850–$1,500 installed by a contractor. Gravel for shed base pads is the cheapest proper foundation you can put under a shed — roughly half the price of a concrete slab. The tables below use typical 2026 US prices: bulk gravel at $25–$45 per ton, a 12-inch overhang and 4 inches of stone.
| Shed size | Gravel pad | Gravel needed | DIY cost | Installed cost |
|---|---|---|---|---|
| 8×10 ft | 10×12 ft (120 sq ft) | ~2.4 tons | $260–$495 | $600–$1,100 |
| 10×12 ft | 12×14 ft (168 sq ft) | ~3.4 tons | $300–$570 | $850–$1,500 |
| 12×16 ft | 14×18 ft (252 sq ft) | ~5.1 tons | $370–$700 | $1,250–$2,250 |
| 16×20 ft | 18×22 ft (396 sq ft) | ~8.1 tons | $485–$925 | $2,000–$3,500 |
What the DIY cost includes
| Cost item | 10×12 shed | 12×16 shed |
|---|---|---|
| Gravel ($25–$45/ton, incl. 10% extra) | $85–$155 | $130–$230 |
| Delivery fee | $75–$150 | $75–$150 |
| Landscape fabric | $20–$35 | $25–$50 |
| Pressure-treated timber frame | $70–$140 | $90–$180 |
| Plate compactor rental (1 day) | $50–$90 | $50–$90 |
| Total DIY | $300–$570 | $370–$700 |
Contractors typically charge $5–$9 per square foot of pad, which covers excavation, leveling, fabric, framing, gravel, delivery and compaction. Ask whether the quote includes grading and haul-away of the dug-out soil — those are the usual extras.
What raises the cost of a gravel shed foundation
- Sloped ground: a pad on a slope needs a taller frame or a retaining edge and more gravel on the low side — add 10–30%.
- Poor drainage or soft soil: go to 6 inches of stone, which adds about 50% to the gravel bill.
- Distance and access: delivery is a flat fee per truck, so a small pad pays the same delivery as a large one. If the truck cannot reach the site, budget for wheelbarrow labor.
- Permits: many towns exempt sheds under 120–200 sq ft, but larger sheds may need a permit ($50–$300).
Gravel pad vs other shed foundations
| Foundation (10×12 shed) | Typical cost | Best for |
|---|---|---|
| Concrete deck / pier blocks | $100–$300 DIY | Small, light sheds on firm, level ground |
| Gravel pad (DIY) | $300–$570 | Most wood and resin sheds — best drainage per dollar |
| Gravel pad (installed) | $850–$1,500 | Sloped sites or when you don't want to rent equipment |
| Concrete slab | $1,200–$2,400 | Workshops, garages, heavy equipment |
Cheapest gravel for a shed base
The cheapest gravel that still works for a shed base is crusher run ($20–$35 per ton) or recycled crushed concrete ($10–$25 per ton where available). Both compact into a firm, level pad. Clean #57 stone costs a little more ($30–$50 per ton) but drains better. Avoid pea gravel even when it is on sale — the rounded stones roll under load and the shed will settle unevenly.
Related Calculators & Guides
Frequently Asked Questions
How much gravel do I need for a shed base?+
A 10×12 ft shed with a 12-inch perimeter overhang needs a 12×14 ft gravel pad. At 4 inches deep that is about 2.1 cubic yards, or 3.1 tons of crushed stone. Order about 3.4 tons to allow 10% for waste and compaction. Without the overhang it is about 2.2 tons, but the overhang is what keeps water away from the shed floor. Use the calculator above for your exact shed size.
How deep should a gravel shed base be?+
A gravel shed base should be at least 4 inches deep for proper drainage and stability. For larger sheds (over 100 sq ft) or if you're storing heavy equipment, use 6 inches. The base must be compacted with a plate compactor for a level surface. Always extend the gravel 6–12 inches beyond the shed walls on all sides for drainage.
What size gravel for a shed base?+
Use 3/4-inch angular crushed stone — sold as #57 stone — or 3/4-inch-minus crusher run, which has the same top size plus stone dust. Stone in the 1/2 to 1 inch range locks together when compacted and drains well. Avoid stone smaller than 3/8 inch and rounded stone such as pea gravel or river rock, which won't compact.
What is the best gravel for a shed base?+
Crushed stone #57 (3/4 inch angular gravel) is the best material for shed bases. Its angular shape locks together when compacted, creating a stable, level foundation that drains water effectively. Crusher run (crushed stone with stone dust/fines) is also excellent — it compacts to an even denser surface. Avoid pea gravel and smooth river rock, which won't compact and can cause your shed to settle unevenly.
How much does a gravel pad for a shed cost?+
A gravel pad for a 10×12 shed costs about $300–$570 DIY (gravel, delivery, fabric, timber frame and compactor rental) or $850–$1,500 installed. Contractors usually charge $5–$9 per square foot of pad. An 8×10 shed pad runs $260–$495 DIY and a 12×16 shed pad $370–$700 DIY. A concrete slab for the same shed costs $1,200–$2,400.
What is the cheapest gravel for a shed base?+
Crusher run ($20–$35 per ton) and recycled crushed concrete ($10–$25 per ton) are the cheapest gravels that still make a solid shed base. Both compact into a firm, level pad. Pea gravel is often cheap too, but it does not compact and should not be used under a shed.
Do I need landscape fabric under a shed base?+
Yes — landscape fabric (geotextile) is essential under a gravel shed base. It prevents the gravel from mixing with the soil below (which compromises drainage), blocks weed growth that can push through the gravel, and helps maintain the integrity of the base over time. Use commercial-grade woven geotextile fabric. Overlap seams by at least 12 inches and extend fabric to cover the entire gravel pad including perimeter overhang.
Can I put a shed directly on gravel?+
Yes, you can place a shed directly on a properly prepared gravel pad. The gravel must be at least 4 inches deep, compacted with a plate compactor, and leveled in all directions. The pad should extend 12 inches beyond the shed on all sides. For wooden shed floors, consider adding concrete deck blocks or pier blocks on top of the gravel for additional protection against ground moisture. Check your shed manufacturer's recommendations — some warranties require specific foundation types.