If the car park tarmac outside your Kent premises is cracking, holding water or collecting potholes, the first question is usually what it will cost to put right. Resurfacing a car park with a sound base typically costs around £20 to £60 per square metre. A full dig-out and rebuild costs more.
That is a wide range, and for good reason. The condition of what sits underneath, the size of the area and how much the work has to fit around your business all move the price. This guide covers typical costs, what pushes them up or down, how to tell whether your car park needs a repair or a rebuild, and what happens once work starts.
How much does car park resurfacing cost in Kent?
Most published guides put car park resurfacing at around £20 to £60 per square metre where the existing base is sound. Large, machine-laid car parks tend to sit at about £35 to £60 per square metre. Where the car park has to be excavated and rebuilt from the sub-base up, expect roughly £40 to £100 per square metre.
| Type of work | Rough cost per m² | What it involves |
|---|---|---|
| Patch repairs | Usually quoted per job | Cutting out and relaying potholes and damaged sections |
| Resurfacing over a sound base | £20 to £60 | Planing off the worn surface and laying a new surface course |
| Large car park, machine laid | £35 to £60 | Resurfacing at scale with open access for plant |
| Full excavation and rebuild | £40 to £100 | New sub-base, drainage, binder and surface courses |
For context, Checkatrade’s tarmac cost guide puts a typical fully installed tarmac surface at around £90 per m² on smaller residential jobs. Car parks usually come in below that per square metre, because they are laid by machine over larger areas. The OtherCalculators tarmac cost model gives a useful worked example: a 300 m² car park at its 2026 rates works out at roughly £10,500 to £18,000.
As a rough illustration, a 500 m² car park resurfaced at £35 to £60 per m² would come to around £17,500 to £30,000 before extras such as new drainage or kerbs.
Treat all of these as guide figures, not quotes. When you compare prices, check whether each one includes VAT, line marking and any planing. Two quotes can look far apart simply because one leaves those out. For a price on your own site, see our commercial tarmac and car park surfacing services.
What affects the cost of a commercial tarmac car park?
Two car parks of the same size can be priced thousands of pounds apart. These are the factors that make the difference.
Size
A crew, a paver, a roller and a lorry of tarmac cost much the same to bring to site whether they cover 200 m² or 2,000 m². The larger the area, the lower the rate per square metre.
Condition of the base
This is the biggest single factor. If the sub-base is sound, only the top layer needs replacing. If it has failed, it has to be dug out and rebuilt with new stone, which can double the cost of the job.
Planing and levels
Laying new tarmac straight over old raises the level of the car park. Next to kerbs, building entrances and drainage gullies that causes problems, so the worn surface is usually planed off first. It adds to the price, but it keeps levels and drainage working.
Drainage
Standing water destroys tarmac. If water pools in the same spots, the falls or the gullies need correcting before resurfacing, or the new surface will fail in the same places.
Traffic loading
A staff car park used by cars needs a lighter build than a yard taking delivery vans and HGVs. Heavier traffic means a thicker surface and a deeper sub-base.
Layout and access
An open rectangle can be machine laid quickly. Islands, planters, tight corners and lots of kerbed edges mean more hand laying, which costs more per square metre.
Working around your business
If the car park has to stay partly open, the work is split into phases. Evening or weekend working adds to the cost, but for a retail site or a surgery it is often cheaper than closing.
Extras
Line marking, new kerbs, signage, accessible bays and pedestrian walkways are often priced separately. Ask for them to be itemised.
Resurface, repair or rebuild: which does your car park need?
It comes down to the base. If the problems are on the surface and the ground underneath is sound, patch repairs or resurfacing will do the job. If the car park is sinking, rutting or breaking up across large areas, the base has failed and rebuilding is the only fix that lasts.
| What you are seeing | What it usually means | Likely fix |
|---|---|---|
| A few potholes or trip hazards in otherwise good tarmac | Localised wear | Patch repairs |
| Loose stones, fine cracking and a tired, faded surface across the car park | Worn surface course, sound base | Resurfacing |
| Sinking, rutting, wide cracks, water pooling in the same places, or patches that keep failing | Base or drainage failure | Rebuild |
Patching makes sense when damage is limited. A small pothole filled early is cheap. Left alone, water gets in, frost opens it up and it spreads into the tarmac around it.
The trap is patching a car park that is past it. If you are paying for new patches every winter and they keep breaking out, the money would be better spent on resurfacing. And if the patches are sinking rather than breaking up, the problem is below the surface. A proper survey should tell you which situation you are in before you commit to a price.
Car park resurfacing process and how long it takes
Every job is different, but a commercial car park resurfacing project generally follows the same sequence.
- Site survey. The contractor checks the surface, the base, the drainage and how vehicles and people move through the site.
- Programme and phasing. You agree which areas close and when, so deliveries, staff and customers can still get in.
- Planing. The worn surface is milled off to the right depth.
- Base and drainage repairs. Soft spots are dug out and rebuilt, and gullies or falls are corrected.
- Laying. New tarmac is machine laid and rolled. Deeper repairs get a binder course first, then a surface course on top.
- Line marking. Bays, arrows, accessible bays and pedestrian routes are marked out.
- Reopening. The car park goes back into use once the tarmac has had time to harden.
As a rough guide, small car parks can be finished in one to two days, with larger or more complex jobs taking three to six days. Bigger commercial resurfacing projects run in phases can take one to two weeks, and a new-build car park can take several weeks from start to handover.
Weather plays a part. Hot tarmac needs to be laid and compacted before it cools, so heavy rain and hard frosts can push dates back. Drier, milder months give the most reliable programme.
Once the surface is down, it can usually be walked on straight away. Many contractors advise waiting around 48 hours before letting vehicles on, particularly on a busy site, so the new surface is not marked or rutted early.
To see the process on real Kent sites, look at our veterinary surgery car park in Charing, where we levelled the sub-base and laid a new 10mm stone mastic asphalt surface, and our car park resurfacing and lining for the University of Kent in Canterbury.
How long does a tarmac car park last?
A well laid tarmac car park on a small or medium business site typically lasts around 15 to 20 years. Sites that take regular lorries and heavy vehicles wear faster and may need resurfacing after 10 to 15 years.
How long yours lasts depends on three things: how well the base was built, what drives on it, and how it is looked after. Kent’s wet winters are hard on tarmac. Water gets into small cracks, freezes, expands and opens them up. That is why most car parks fail at the cracks and around blocked drains first.
Simple maintenance adds years:
- Keep gullies and drainage channels clear so water runs off rather than sitting on the surface.
- Deal with potholes and cracks early, before they spread.
- Refresh line markings before they fade. Faded bays cost you spaces and make the site look neglected.
- Get the surface looked at every few years so small faults are caught while they are still cheap.
If the base is still sound when the surface wears out, resurfacing can give the car park another full lifespan without the cost of a rebuild.
FAQs
Do I need planning permission to resurface a car park?
Usually not. Like-for-like resurfacing or repair of an existing car park does not normally need planning permission. If the work changes the drainage, extends the surfaced area, alters the access or creates a new layout, check with your district or borough council first, such as Ashford Borough Council, before work starts.
Can new tarmac be laid over the old surface?
Yes, if the existing base is sound and the surface is not badly broken up. Overlaying raises the level, though, so around kerbs, doorways and gullies the old surface is usually planed off first. If the car park is sinking or rutting, laying over it will only hide the problem for a short time. Our guide to tarmac resurfacing overlays explains when an overlay works and when it does not.
Can my business stay open while the car park is resurfaced?
In most cases, yes. The work can be split into phases so only part of the car park is closed at any one time, with the rest kept open for staff and customers. Evening or weekend working is another option where daytime closures are not possible, though it usually costs more.
When can vehicles use the car park again?
New tarmac can normally be walked on straight away. For vehicles, many contractors recommend waiting around 48 hours, especially on a busy car park where lots of turning and braking could mark the surface. Your contractor should confirm timings for your site as part of the programme.
Why do car park resurfacing quotes vary so much?
Usually because they are not pricing the same job. One quote may include planing, base repairs, drainage, line marking and VAT, while another leaves some of those out. Ask each contractor to itemise the depth and type of tarmac, the preparation work and the extras, so you can compare like with like.
If your car park is showing any of the signs above, get in touch with Ashford Tarmac to arrange a site visit and a quote for your car park.