Dropped Kerb Materials, Planning and Drainage

What materials can you use for your driveway — and when do you need planning permission? A new or revamped driveway can transform the look of a home, improve day-to-day usability, and add value to your property. However, the material you choose has a direct impact on whether you need planning permission, how well the surface drains, and how much ongoing maintenance is required. This guide covers the most popular driveway materials available in the UK, the planning rules that apply, and the drainage standards you need to meet.

Driveway Materials in the UK

Gravel

Gravel is one of the most affordable and versatile driveway materials available, making it a popular choice for rural properties and larger plots where cost-effectiveness is a priority. It is naturally permeable, allowing rainwater to drain freely through the surface and into the ground beneath, which means it rarely triggers the need for planning permission. Gravel is available in a wide range of colours, sizes, and textures, giving homeowners considerable flexibility in achieving the desired appearance.

However, gravel does require regular maintenance to keep the surface even and presentable. Stones can shift under heavy vehicle use and may scatter onto adjacent paths or lawns, particularly without a robust edging system. Periodic raking and occasional topping up are necessary to maintain an attractive and functional surface over time.

Block Paving

Block paving is one of the most popular choices for urban and suburban homes across the UK. Interlocking bricks or blocks are available in a huge variety of colours, shapes, and laying patterns, allowing homeowners to create a highly customised finish that complements the style of their property. A well-installed block paving driveway is extremely durable and can last for decades with minimal intervention.

Block paving is more expensive than gravel or tarmac, both in material costs and installation labour. However, it offers the advantage that individual damaged blocks can be lifted and replaced without disturbing the surrounding surface. Permeable block paving systems are also available, featuring wider joints filled with fine aggregate that allow water to pass through the gaps, helping you comply with planning regulations without the need for separate drainage infrastructure.

Tarmac and Asphalt

Tarmac and asphalt provide a practical, cost-effective solution that delivers a sleek, uniform appearance. These materials are quick to lay and are typically ready for use within a day or two of installation, making them one of the most convenient options for homeowners who want to minimise disruption. Tarmac requires very little ongoing maintenance — an occasional sweep and a resealing treatment every few years will keep the surface in good condition.

The main drawback of standard tarmac is that it is impermeable, which means driveways over 5m² will require planning permission unless the surface water is directed to a permeable area within the property. Tarmac can also soften in periods of extreme heat, and heavy or sharp objects may leave impressions on the surface during warm weather.

Resin-Bound Driveways

Resin-bound surfacing offers a modern, high-end finish that is highly customisable. Natural aggregate stones are mixed with a clear UV-stable resin and trowelled onto a prepared base to create a smooth, seamless surface available in a wide range of colours and textures. When installed on a properly constructed permeable sub-base, resin-bound surfacing allows water to drain through the surface, making it a genuinely permeable option that can help you avoid the need for planning permission.

Resin-bound driveways do require professional installation to achieve the correct depth, finish, and permeability, and the upfront investment is higher than gravel or tarmac. However, the result is an attractive, low-maintenance surface that resists weeds, withstands vehicle traffic, and retains its appearance for many years.

Concrete

Concrete is one of the most durable driveway materials on the market, offering exceptional longevity and minimal upkeep. It is particularly well suited to larger properties where a substantial, hard-wearing surface is needed. Concrete can be finished in a variety of ways, including brushed, stamped, exposed aggregate, or coloured, though its aesthetic flexibility is more limited than block paving or resin-bound options.

Standard concrete is impermeable, so driveways exceeding 5m² will require planning permission unless adequate drainage is provided to manage surface water within the property boundaries. Concrete can also be prone to cracking over time if the sub-base is not properly prepared or if the ground beneath is subject to movement.

Planning Permission Requirements

Under current regulations, planning permission is required for any new or replacement driveway in a front garden that exceeds 5 square metres of impermeable surfacing. This rule was introduced to address the growing problem of urban flooding caused by the loss of permeable front gardens to hard surfacing. Impermeable materials such as standard concrete, traditional tarmac, and non-porous block paving prevent rainwater from soaking into the ground, increasing surface water run-off and putting pressure on already strained public drainage systems.

If you use permeable materials — or design your driveway so that rainwater is directed to flower beds, lawns, or a soakaway within your property boundaries — you can often avoid the need for planning permission altogether. This makes the choice of material and drainage design a critical decision at the outset of any driveway project. Properties in conservation areas, listed buildings, and those on classified roads may face additional planning requirements regardless of the materials chosen.

Drainage and Maintenance

Proper drainage is not just a planning requirement — it is essential for the long-term performance and compliance of any driveway with UK building regulations. Surface water from your driveway must be managed within your property boundaries and must not be allowed to discharge onto the public highway or footway.

For permeable surfaces such as gravel, permeable block paving, and resin-bound surfacing on a permeable sub-base, drainage is handled naturally as water passes through the surface and into the ground beneath. However, even permeable surfaces require a properly constructed sub-base with adequate depth and appropriate aggregate to ensure effective water infiltration.

For impermeable surfaces, a formal drainage system is required. Common solutions include soakaways — underground chambers that collect surface water and allow it to percolate gradually into the surrounding soil — channel drains installed at the foot of a slope or the property boundary to intercept run-off, and permeable sub-bases beneath the surface that act as temporary water storage. The specific drainage solution required will depend on the size of the driveway, the gradient of the site, the local soil conditions, and the capacity of the existing drainage infrastructure.

Councils take drainage compliance seriously when assessing both dropped kerb and driveway applications. Demonstrating that your proposed drainage solution is effective and appropriate for the site will significantly strengthen your application and help avoid delays or refusals.