Permeable tarmac driveways in Dyfed

How much does a permeable tarmac driveway cost in Dyfed?

Rates in Dyfed follow Wales, about 5% below our UK midpoint.

Item	Guide price (inc VAT)
Porous asphalt drive on a permeable stone base	£76–£119 per m²
Example: 30 m² drive	£2,500–£3,900
Example: 50 m² drive	£3,800–£5,950
Example: 80 m² drive	£6,100–£9,500

Towns we cover in Dyfed

Postcode areas: SA, SY.

What is included?

A permeable tarmac drive uses porous asphalt, a mix with fewer fine particles so water passes through the gaps, laid on an open-graded stone base that stores the rain and lets it soak into the ground.

Ground check: how fast does the soil drain?
Geotextile separating layer on the formation
Open-graded permeable sub-base, often Type 3 or 4/20 stone
Porous asphalt binder and surface courses
Overflow to a soakaway or border on slow-draining ground
Edge restraint that does not block the flow

Rules in Dyfed

In Wales, new front hardstanding should be porous or drain to a permeable area within the property, and work covering 100 m² or more with drainage effects usually needs SAB approval first. Any new or widened crossing over the pavement needs approval from the council as highway authority.