Permeable tarmac driveways in Harrow

What does a permeable tarmac driveway cost in Harrow?

For Harrow, we apply the London rate, about 20% above our UK midpoint. Your survey turns these ranges into a fixed price.

Item	Guide price (inc VAT)
Porous asphalt drive on a permeable stone base	£96–£150 per m²
Example: 30 m² drive	£3,150–£4,950
Example: 50 m² drive	£4,800–£7,500
Example: 80 m² drive	£7,700–£12,000

As a 2026 guide in Harrow, permeable tarmac driveway work runs at about £96–£150 per m² including VAT, so a 30 m² drive is roughly £3,150–£4,950. Guide only; the survey confirms a fixed price.

Where we work in and around Harrow

What applies in Harrow. We cover Harrow as part of our regular Greater London rounds.

Postcodes: HA1, HA3, HA2, HA7
Area: Greater London
Nearest towns: Brent (2 miles), Northolt (3 miles), Greenford (4 miles), Ruislip (4 miles)
Pricing: London, about 20% above our UK midpoint
Kerb approvals: The highway authority

We also cover nearby Brent, Northolt, Greenford, Ruislip, Bushey.

Rules that apply in Harrow

In England, householder permitted development (Class F of the 2015 General Permitted Development Order) lets you lay a hard surface in front of a house without planning permission if it is porous, or if the rainwater is directed to a permeable area within the property. If the area is more than 5 m² and neither applies, you need permission. Standard dense tarmac is not porous, so a dense tarmac drive needs a lawn, border, channel to a soakaway or other permeable route for its water. Any new or widened crossing over the pavement needs approval from the highway authority (the county or unitary council).

What the price covers

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?
Dig out deeper than a standard drive to fit the storage layer
Open-graded permeable sub-base, often Type 3 or 4/20 stone
Porous asphalt binder and surface courses
Edge restraint that does not block the flow

Layer by layer

Questions about permeable tarmac driveways in Harrow

Do you cover all of Harrow?

We cover Harrow including HA1, HA3, HA2, HA7, and nearby Brent, Northolt, Greenford.

How much does a permeable tarmac driveway cost in Harrow?

As a 2026 guide in Harrow, permeable tarmac driveway work runs at about £96–£150 per m² including VAT, so a 30 m² drive is roughly £3,150–£4,950. Edging, drainage and a dropped kerb are priced separately where needed.

How long does a permeable tarmac driveway take in Harrow?

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

What approvals apply in Harrow?

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).

More we do in Harrow

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