Permeable tarmac driveways in Carmarthen

Permeable tarmac driveway prices in Carmarthen

These Carmarthen guide prices reflect rates in 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 Carmarthen, permeable tarmac driveway work runs at about £76–£119 per m² including VAT, so a 80 m² drive is roughly £6,100–£9,500. Guide only; the survey confirms a fixed price.

What we do on 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.

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
Overflow to a soakaway or border on slow-draining ground
Edge restraint that does not block the flow

Rules that apply in Carmarthen

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. If the job needs a dropped kerb, the council as highway authority approves it before any work on the footway.

How it is built

Carmarthen: the local details

The key facts for Carmarthen. Smaller towns such as Carmarthen are surveyed alongside nearby jobs in Dyfed.

Postcodes: SA31, SA33
Area: Dyfed
Nearest towns: Llanelli (13 miles), Ammanford (14 miles)
Pricing: Wales, about 5% below our UK midpoint
Kerb approvals: The council

We also cover nearby Llanelli, Ammanford.

Questions about permeable tarmac driveways in Carmarthen

Do you cover all of Carmarthen?

We cover Carmarthen including SA31, SA33, and nearby Llanelli, Ammanford.

How quickly can work start in Carmarthen?

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

What is the price of a permeable tarmac driveway in Carmarthen?

As a 2026 guide in Carmarthen, permeable tarmac driveway work runs at about £76–£119 per m² including VAT, so a 80 m² drive is roughly £6,100–£9,500. Edging, drainage and a dropped kerb are priced separately where needed.

Are there planning or highway rules in Carmarthen?

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.

Other work in Carmarthen

Send us a postcode, a rough size and a photo or two, and we'll come back with survey dates for Carmarthen.