Permeable tarmac driveways in Treharris

How much should I budget in Treharris?

Local guide rates for Treharris (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

As a 2026 guide in Treharris, permeable tarmac driveway work runs at about £76–£119 per m² including VAT, so a 30 m² drive is roughly £2,500–£3,900. Guide only; the survey confirms a fixed price.

Planning and kerb rules for Treharris

In Wales, a new hard surface in front of a house is permitted development only if it is porous or drains to a permeable area within the property; repairing or replacing up to 5 m² of existing hardstanding is allowed without meeting that condition. Separately, since January 2019, construction covering 100 m² or more that affects drainage generally needs approval from the council's SuDS Approving Body (SAB) before work starts, even where planning permission is not needed. Larger drives, shared surfaces and car parks often reach that threshold. Any new or widened crossing over the pavement needs approval from the council as highway authority.

What is included in a permeable tarmac driveway?

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.

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

Where we work in and around Treharris

Survey cover and pricing for Treharris. Treharris is covered on our Mid Glamorgan rounds, 6 miles from Rhondda.

Postcodes: CF46
Area: Mid Glamorgan
Nearest towns: Mountain Ash (3 miles), Bargoed (3 miles), Blackwood (4 miles), Pontypridd (5 miles)
Pricing: Wales, about 5% below our UK midpoint
Kerb approvals: The council

The same service is available in Mountain Ash, Bargoed, Blackwood, Pontypridd, Rhondda.

Your questions answered

Will someone visit before I get a fixed price in Treharris?

Yes for new surfacing such as drives, paths, private roads and car parks. Small repairs are often priced from photos; if a visit is needed for a repair-only job, we tell you any charge first.

Do I need permission for a permeable tarmac driveway in Treharris?

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. Dropped kerbs are approved by the council as highway authority.

How long does a permeable tarmac driveway take in Treharris?

Usually 3–5 working days. We book Treharris surveys alongside other jobs in Mid Glamorgan, and give you dates once the specification is agreed.

How much does a permeable tarmac driveway cost in Treharris?

As a 2026 guide in Treharris, permeable tarmac driveway work runs at about £76–£119 per m² including VAT, so a 30 m² drive is roughly £2,500–£3,900. Edging, drainage and a dropped kerb are priced separately where needed.

More we do in Treharris

Ready for a price in Treharris? Use the guide price tool or send the form, and we'll arrange a visit.