Permeable tarmac driveways in Welwyn Garden City

Permeable tarmac driveway prices in Welwyn Garden City

Guide prices below are for Welwyn Garden City, adjusted for the East of England, where surfacing rates run about 5% above our UK midpoint.

Item	Guide price (inc VAT)
Porous asphalt drive on a permeable stone base	£84–£131 per m²
Example: 30 m² drive	£2,750–£4,350
Example: 50 m² drive	£4,200–£6,550
Example: 80 m² drive	£6,700–£10,500

As a 2026 guide in Welwyn Garden City, permeable tarmac driveway work runs at about £84–£131 per m² including VAT, so a 30 m² drive is roughly £2,750–£4,350. Guide only; the survey confirms a fixed price.

Covering Welwyn Garden City

What applies in Welwyn Garden City. Welwyn Garden City is 13 miles from Watford, and we survey there as part of Hertfordshire cover.

Postcodes: AL8, AL7, AL6
Area: Hertfordshire
Nearest towns: Hatfield (3 miles), Hertford (6 miles), St Albans (6 miles), Harpenden (7 miles)
Pricing: East of England, about 5% above our UK midpoint
Kerb approvals: The highway authority

The same service is available in Hatfield, Hertford, St Albans, Harpenden, Stevenage.

The build-up we price

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.

Dig out deeper than a standard drive to fit the storage layer
Geotextile separating layer on the formation
Porous asphalt binder and surface courses
Overflow to a soakaway or border on slow-draining ground
Edge restraint that does not block the flow

Do I need permission in Welwyn Garden City?

In England, a new hard surface over 5 m² in front of a house needs planning permission unless it is porous or drains to a lawn, border or soakaway within the property. A vehicle crossing over the footway is a separate approval, from the highway authority (the county or unitary council).

Your questions answered

How much does a permeable tarmac driveway cost in Welwyn Garden City?

As a 2026 guide in Welwyn Garden City, permeable tarmac driveway work runs at about £84–£131 per m² including VAT, so a 30 m² drive is roughly £2,750–£4,350. Edging, drainage and a dropped kerb are priced separately where needed.

Will someone visit before I get a fixed price in Welwyn Garden City?

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.

Are there planning or highway rules in Welwyn Garden City?

In England, a new hard surface over 5 m² in front of a house needs planning permission unless it is porous or drains to a lawn, border or soakaway within the property. Dropped kerbs are approved by the highway authority (the county or unitary council).

How long does a permeable tarmac driveway take in Welwyn Garden City?

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

Other work in Welwyn Garden City

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