How this calculator works
The right repair depends on why the tarmac is failing, so this tool prices three different jobs against your affected area. Choose the method that matches the damage and it returns a cost per square metre and a total, letting you compare repairing against replacing before you call a contractor. If the base has gone, price a rebuild with the tarmac driveway cost calculator; if you only need to top up material, size it with the tarmac quantity calculator.
Choosing the right repair method
- Patch repair. For localised damage — a single pothole or edge break. The weak material is cut out and new hot mix compacted into the void. Cheap, but leaves a visible patch.
- Resurfacing overlay. The sweet spot for a drive that looks tired but is structurally solid. The surface is cleaned, sprayed with a bituminous tack coat, and a fresh surface course laid over the top — like new for far less than a rebuild.
- Full replacement. Necessary when the drive is deeply rutted or cracked like a jigsaw. That means the sub-base has failed and must be dug out and rebuilt before new tarmac goes down.
The cost method
Patch repair ≈ area (m²) × £50–£90/m² (min call-out applies)
Resurface ≈ area (m²) × £40–£55/m²
Full replace ≈ area (m²) × £55–£90/m²
Small jobs cost more per m². A pothole is usually a fixed minimum call-out rather than a true per-m² rate, because the crew and material for a short visit cost roughly the same whether the patch is one square metre or three.
Worked example
Example — a tired 40 m² driveway, repair vs replace
- Area:
- 40 m²
- Condition:
- faded and lightly cracked, base still sound
- Resurface: 40 m² × £40–£55 = £1,600–£2,200
- Full replacement: 40 m² × £55–£90 = £2,200–£3,600
- Saving by resurfacing: ≈ £600–£1,400
Cheapest sound option: Resurface: ≈ £1,600–£2,200
Resurfacing only works while the base is sound. If the same drive showed deep alligator cracking, the overlay would crack straight back through and replacement would be the true cost.
Reference data
| Type of work | Typical cost (£/m²) |
|---|---|
| New driveway — full build (excavate, MOT Type 1 sub-base, two-course tarmac) | £55–£90 |
| Supply and lay tarmac only (no groundworks) | £45–£60 |
| Resurface / overlay onto a structurally sound base | £40–£55 |
| Localised patch repair (per m² of patch) | £50–£90 |
| Coloured or premium surfacing (clear-binder macadam) | £60–£100+ |
| Large car park / private road (economies of scale) | £35–£60 |
Key facts
- Resurfacing a sound tarmac drive with a fresh overlay costs about £40–£55 per square metre in the UK (2026 estimate), against £55–£90 for a full replacement.
- Widespread 'alligator' cracking indicates sub-base failure, so a patch or overlay is only a temporary fix — the base must be rebuilt.
- Localised patch repairs run roughly £50–£90 per square metre and often carry a fixed minimum call-out for small areas.
- Sealing a tarmac driveway every three to five years slows cracking but cannot save a surface failing from below.
Who should use this and when
This is for anyone deciding what to do with an ageing drive: repair it, resurface it, or start again. The honest answer usually comes from the cracking pattern rather than the price — surface fading and hairline cracks point to a cheap overlay, while deep ruts and interconnected cracking point to a rebuild. Use the tool to put a number on each option, then let the condition of the base decide. For a brand-new drive or a like-for-like rebuild, cross over to the driveway cost calculator.
Tips and common pitfalls
- Diagnose the base before choosing. Overlaying a failed sub-base wastes money — the new surface cracks within a season.
- Expect a minimum charge for small patches. A single pothole rarely follows the per-m² rate.
- Check the finished level. An overlay raises the surface; make sure it still clears the damp-proof course and drains away from the house.
- Fix cracks early. Water reaching the base is what turns a cheap repair into a full replacement.
Frequently asked questions
Is it cheaper to repair or replace a tarmac driveway?+
Patching potholes or cracks is much cheaper up front. But if the damage is widespread 'alligator' cracking, that signals the sub-base has failed — patching then only buys a little time and full replacement is the sounder investment. Use the extent and depth of the cracking, not just the surface look, to decide.
How much does tarmac resurfacing cost?+
Resurfacing — cleaning the old surface, applying a bitumen tack coat and laying a fresh surface course — typically costs about £40 to £55 per square metre in 2026. It is far cheaper than a new drive because it avoids excavation and a new sub-base, so a 40 m² drive is roughly £1,600–£2,200.
Can you lay new tarmac over old tarmac?+
Yes, if the old surface is structurally sound — no severe subsidence or deep cracking — and the new level will not bridge your property's damp-proof course. Overlaying a failing drive just leads to reflective cracking, where the old cracks work their way up through the new layer.
What is tarmac patch repair?+
The contractor saw-cuts the damaged area to clean vertical edges, applies a bond coat, fills the void with hot-mix asphalt (or cold-lay tarmac for a temporary fix), and compacts it. It is the cheapest option per job but leaves a visible patch, and small patches cost more per square metre because of the minimum call-out.
How much does it cost to fill a pothole in a tarmac drive?+
A single small pothole is usually priced as a minimum call-out rather than by area, often a fixed fee to cover the crew and material for the visit. Per square metre, localised patching works out around £50–£90 because it lacks the economies of scale of a large job.
How often should a tarmac driveway be sealed?+
Sealing every three to five years helps keep water out of the surface and slows cracking and fading. It is maintenance, not repair: sealing a sound drive extends its life, but it will not rescue one that is already cracking from a failed base.
Related Tarmac Tools
Estimate the comprehensive cost of laying a new tarmac driveway.
Tarmac Surface Cost CalculatorCalculate specialized tarmac surfacing costs for car parks, pathways, and private roads.
Asphalt Repair Cost CalculatorEstimate budget for asphalt patching and repairs.
Asphalt Patch CalculatorEstimate material for pothole and patch repairs.
Tarmac Quantity CalculatorCalculate required hot mix tarmac tonnage and volume.
Tarmac Sub-Base CalculatorCalculate MOT Type 1 aggregate needs for a structurally sound sub-base.
Estimates & assumptions
- Cost figures are UK-wide planning ranges for 2026, labelled estimates — not quotes. Region, access and the true condition of the base all move the price.
- The tool compares typical method rates; it cannot inspect your drive or confirm whether the sub-base has failed.
- Patch pricing assumes a minimum call-out for small areas, which the per-m² rate does not fully capture.
- It does not price drainage upgrades, kerb works or disposal of contaminated material.
Estimates are for planning only. A site visit from a qualified contractor is the only way to confirm whether repair or replacement is right for your drive.