Gravel vs Tarmac Driveway: Which Is Better for Your Home?

Gravel vs Tarmac at a Glance

Gravel and tarmac sit at opposite ends of the driveway spectrum. Gravel is the affordable, DIY-friendly, permeable option. Tarmac is the smooth, professionally-installed surface that needs drainage planning. The right choice depends on your budget, your site, and how much hands-on maintenance you're willing to do.

Side-by-Side Comparison

Cost Comparison: Gravel vs Tarmac

Cost is where gravel wins decisively. Gravel materials cost £15–£30 per square metre, and because it's a straightforward DIY job you can avoid labour costs entirely. Tarmac costs £45–£75/m² installed — and you can't install it yourself because it requires specialist hot-lay machinery, rollers, and experience working with the material before it cools.

For a typical 50m² single driveway, the numbers look like this:

Over 10 years, a gravel driveway costs roughly a third of what tarmac costs — including all maintenance and top-ups.

Drainage & Planning Permission

This is the single biggest practical difference between gravel and tarmac. Gravel is fully permeable — rainwater drains straight through into the ground beneath. Under current UK planning rules (General Permitted Development Order), permeable surfaces are exempt from planning permission, no matter the size of the area.

Tarmac is impermeable. If you're surfacing more than 5m² of a front garden with tarmac, you legally need planning permission from your local council — or you must install a separate drainage system that channels water to a permeable area. This adds cost, complexity, and delay to any tarmac project. In flood-risk areas or new-build developments subject to SuDS requirements, gravel is the straightforward compliant choice.

Gravel Driveway: Pros & Cons

Tarmac Driveway: Pros & Cons

When to Choose Gravel

Gravel is the right choice if your priority is keeping costs low and you're happy with a weekend DIY project. It's ideal for homeowners who want to avoid the planning permission process — particularly for front driveways where the 5m² rule applies. If you live in a flood-risk area or a new-build estate with SuDS requirements, gravel is the simplest route to compliance.

Gravel also suits people who enjoy changing the look of their property. Because it's loose, you can switch colours or add decorative borders without ripping anything up. And if environmental impact matters to you, gravel has the lowest carbon footprint of any driveway surface by a wide margin.

When to Choose Tarmac

Tarmac is the better option if you need a perfectly smooth, hard-wearing surface — particularly for steep slopes where loose gravel would migrate. It's a good choice if you have heavy vehicles, need wheelchair or mobility scooter access, or simply don't want to do any regular raking or top-up maintenance.

If you're surfacing a back garden or an area under 5m² where planning permission isn't an issue, tarmac's drainage drawback matters less. It's also worth considering if you want a "finished" look from day one with no ongoing effort — although you'll need to budget for resealing every few years to maintain that appearance.

Frequently Asked Questions