Understanding Tarmac Driveway Costs
When budgeting for a new driveway, comparing purely the cost of the tarmac itself will lead to vast underestimations. The true cost of laying a driveway is heavily weighted by the groundworks—the men and machinery required to prepare a solid, stable base.
Our calculator takes these vital variables into account. Whether you just need a thin surface overlay on an already pristine foundation, or you are converting an old grassy garden into a reinforced parking area, the estimation adapts to reflect these differing scopes of work.
Factors Affecting Cost Per M²
- Ground Preparation & Excavation: Digging out clay, soil, or breaking up thick concrete requires heavy plant machinery (mini-diggers) and skips for waste removal. This is often the most expensive phase.
- Sub-Base Installation: A solid MOT Type 1 aggregate sub-base must be laid and compacted. Without this, the tarmac will sink beneath the weight of a car.
- Thickness of Tarmac: Standard drives use a 50mm binder course and a 20-30mm wearing course. Specifying a thicker layer for heavy vehicles will increase material prices.
- Edgings and Drainage: A driveway isn't complete without block edging to contain the tarmac and prevent crumbling. Similarly, UK law requires compliant drainage for new driveways to prevent runoff onto public roads.
- Region: Contractors in London and the South East invariably charge higher day rates than those in the North.
Frequently Asked Questions
How much does a tarmac driveway cost?
In the UK, a completely new tarmac driveway typically costs between £55 and £90 per square metre. This includes excavating the old surface, laying a new MOT Type 1 sub-base, and applying a dual-layer tarmac surface. If you already have a sound base and only need an overlay, the cost drops significantly to around £40 - £55 per m².
What is the average tarmac price per m²?
The average price to supply and lay tarmac (without deep groundwork) is roughly £45 to £60 per m². However, the quote you receive from a contractor will bundle labour, plant hire (like rollers), and waste disposal, pushing the total project cost per m² higher.
Is tarmac cheaper than block paving?
Yes, tarmac usually works out 20% to 40% cheaper than block paving. Tarmac is much faster to install over large areas, which drastically reduces the labour costs associated with individually laying block paving by hand.
How thick should a tarmac driveway be?
For a standard domestic driveway, the recommended thickness is 75mm to 80mm. This is comprised of a 50mm base course (binder course) and a 25mm to 30mm surface course (wearing course) on top. Heavier traffic areas may require up to 100mm.
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