How Much Gravel for a Driveway?
Work out the exact tonnage and number of bags for your driveway project. Our calculator factors in the recommended 50mm depth for vehicle traffic, so you order the right amount first time — no shortfalls, no expensive waste.
Dimensions
About Driveway Gravel
A gravel driveway is one of the most popular and cost-effective surfacing options in the UK. Unlike tarmac or block paving, gravel is permeable — rainwater drains straight through, which means you typically don’t need planning permission under permitted development rules. It’s also quick to lay: most homeowners can complete a single-car driveway in a weekend.
The key to a long-lasting gravel driveway is preparation. You need a compacted sub-base (Type 1 MOT is the standard choice) of at least 100mm, topped with a weed membrane, before the decorative gravel goes down. Without a proper sub-base, gravel sinks into the earth within months and develops ruts where tyres track.
Angular gravel is essential for driveways because the irregular edges lock together under compression, creating a stable surface that doesn’t roll under vehicle tyres. Rounded pebbles look attractive but they shift constantly and are impractical for any area with traffic. Slate gravel in the 30–50mm range is a durable, popular option — it locks together well, handles vehicle weight, and looks striking against a dark or light sub-base.
Recommended Depth
The standard recommended depth for a gravel driveway is 50mm (5cm). This provides enough material to create a stable driving surface while keeping gravel manageable underfoot. Going thinner than 50mm will expose the membrane beneath within weeks, especially in areas where you turn the steering wheel. If your driveway has a slope, consider going slightly deeper (60mm) at the bottom where gravel naturally migrates.
UK Planning & Regulations
Gravel driveways don’t require planning permission in the UK because gravel is a permeable surface. Under permitted development rules (in effect since October 2008), any permeable surface — including loose gravel — is exempt from the 5m² rule that applies to impermeable materials like concrete and tarmac. Since Schedule 3 of the Flood and Water Management Act came into force in January 2025, sustainable drainage (SuDS) compliance has become mandatory for developments over 100m² — gravel driveways are inherently compliant. You’ll still need a dropped kerb licence from your local highways authority if you’re creating new vehicle access from the road (typically £800–£2,000).
Tips for Your Driveway Project
- Use gravel retention grids to prevent migration and reduce the amount of gravel you need to top up over time. They also make the surface more wheelchair and pushchair friendly.
- Choose angular stone in the 30–50mm range for good stability. The angular edges lock together under tyre pressure, keeping the surface firm.
- Edge the driveway with a solid border — aluminium edging, timber sleepers, or brick — to stop gravel spreading onto lawns and flower beds.
- Order 10% more than the calculator suggests to account for settling and compaction in the first few weeks.
Seasonal Buying Tip
Order your driveway gravel between October and February for the best prices — spring is peak season for landscaping projects, and bulk bag prices can rise 10–15%. Most UK quarries are in Derbyshire, Somerset, and Leicestershire, so if you’re in the Midlands, your delivery costs will be lower. Allow 2–3 weeks lead time in spring vs 2–3 days in winter.
What type of gravel is best for a driveway?
Angular slate gravel in the 30–50mm range is an excellent choice for driveways. Black slate gravel offers a bold, contemporary look and compacts well under vehicle weight. Avoid anything described as “rounded”, “tumbled”, or “smooth” — polished pebbles look beautiful in decorative areas but roll underfoot and under wheels, creating an unstable driving surface.
Frequently Asked Questions
How deep should gravel be on a driveway?
What is the best type of gravel for a driveway?
How much does gravel for a driveway cost?
Do I need a sub-base under driveway gravel?
Are gravel retention grids worth it for a driveway?
Ready to order your driveway gravel?
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