Planning a driveway extension in Harrow
Across Harrow, front gardens range from narrow terrace plots to broad modern drives, and the best block, pattern and drainage choice changes with them.
Front gardens in much of London are short, so parking depth and the dropped kerb usually decide whether a drive is possible.
How much does a driveway extension cost in Harrow?
Expect driveway extensions in Harrow to come in at around £110–£180 per m², including VAT at 20%. As an example, a 15 m² extension usually comes to between £1,850 and £3,100.
| Item | Guide price inc VAT |
|---|---|
| Driveway extension in block paving | £110–£180 per m² |
| Breaking out an old surface | £12–£50 per m² |
| Edging or kerb, bedded and haunched | £25–£60 per metre |
| Typical channel drain run | £420–£1,200 |
| Dropped kerb (vehicle crossover) construction | £1,200–£3,600 |
Guide figures for London, checked 9 November 2026. See all prices or use the guide price tool.
What does a driveway extension involve?
The hard part is the join. Blocks from the same range can differ in shade from a batch made years ago, and older blocks have weathered, so the survey looks at whether a close match is possible, whether lifting and re-mixing some existing blocks will help, or whether a deliberate border or contrasting panel will look better than a near-miss.
- New edging, kerbs or a low retaining edge where the lawn is cut back
- Joint sand, compaction and a clean-down of the old section
- Matching options: same range, re-mixing old and new, or a planned contrast
- Old edge restraint taken out and the new paving toothed into the old pattern
- Check of the existing drive: block range, thickness, levels and condition
Before we price your driveway extension
- Whether front-garden planning rules apply
- Where rain will go: falls, lawn, border, channel or soakaway
- Access for a mini-digger, skip or grab lorry
- Block range, thickness, colour and pattern to suit the house
- Where an electric vehicle charger cable might run
Rules for front drives in Harrow
Harrow is in England, so these rules apply:
In England, paving in front of the house that covers more than 5 m² needs planning permission unless it is permeable or drains to a lawn, border or soakaway inside your boundary. Permeable block paving, or standard blocks laid to fall onto a planted strip, avoid the need for permission in most cases.
Flats and maisonettes, listed buildings, and homes covered by an Article 4 direction can have tighter rules, and conservation areas, National Parks and National Landscapes restrict some permitted development.
A dropped kerb needs your local highway authority's approval (usually the county, unitary, metropolitan or London borough council), and a new access onto an A, B or C classified road also needs planning permission.
General guidance, not legal advice. Your survey confirms what applies to your home. See the planning guide.
From enquiry to finished paving
Send the basics
Postcode, what you need and a rough size. Photos help.
Survey
We measure, check levels, ground and drainage, and talk through blocks and patterns.
Written quote
An itemised quote with the specification, the price and the start date.
The work
Our paving team builds it to the agreed specification and leaves the site swept.
Why choose Block Paving Contractors
Honest timescales
We tell you how long the job takes and what can delay it, such as approvals and weather.
Water planned first
Falls, channels and soakaways are designed before the pattern is chosen.
One point of contact
You deal with one team from survey to sign-off, with work carried out by paving teams working under S&K.
Itemised quotes
Break-out, waste, edging, drainage and covers are separate lines you can see.
Drive extensions in Harrow: questions
What happens to my old drive?
It is broken out and taken away by skip or grab lorry, listed as its own line on your quote.
Is the survey in Harrow free?
Yes, for new paving here: the survey and written quote are free with no obligation. Repairs and cleaning are usually priced from photos, or from a short visit where needed.
How long does a driveway extension take to build?
Most homes take between three and seven working days, depending on size, the dig and the drainage. Your quote gives the expected duration.
How much does a driveway extension cost in Harrow?
Our guide for Harrow is £110–£180 per m² including VAT, so a 15 m² extension is usually about £1,850–£3,100. Your fixed price follows the survey.
Drive extensions near Harrow
Nearby towns we cover for drive extensions, and drive extensions across Greater London:
- Drive extensions in Brent
- Drive extensions in Greenford
- Drive extensions in Ruislip
- Drive extensions in Southall
- Drive extensions in Cricklewood
- Drive extensions in Willesden
