Pressure washing from £4 per m²
Monster Cleaning pressure washes patios, driveways, paths and decking for £4 per square metre, so a 20 m² patio costs £80. Moss, algae and traffic grime come off with hot water, and block paving gets fresh kiln-dried sand in its joints as standard.
The price follows the size of the area. Measure the length and the width, multiply them, then multiply that by £4. The surface decides how it is washed: concrete, block paving and hard stone take full pressure, while sandstone, softer stone and timber get far less, because the wrong pressure marks them for good. We work across London, Liverpool and Manchester and the areas around them. Ring 0333 555 2076 (8am to 7pm, seven days a week) with the measurements and a rough idea of the state it is in.
Prices last updated September 2026
Pressure washing prices
One rate covers every outdoor surface on this page, along with the biocide, the detergents, the hot-water machine, the rotary surface cleaner and the sand for block paving.
Pressure washing
patios, driveways, paths and decking
£4 per m²
Some typical jobs, worked out at that rate:
| Area | Price | The sum |
|---|---|---|
| Front path, 18 m² | £72 | 12 m × 1.5 m × £4 |
| Patio, 20 m² | £80 | 5 m × 4 m × £4 |
| Rear deck, 25 m² | £100 | 5 m × 5 m × £4 |
| Driveway for one car, 30 m² | £120 | 6 m × 5 m × £4 |
| Driveway for two cars, 60 m² | £240 | 10 m × 6 m × £4 |
For an L-shaped patio, measure it as two rectangles and add them together. Pressure washing jobs start at £67, which only affects areas under 17 m². Where there is no free parking near the property, we add what parking costs us.
What the price includes
- A biocide on moss, algae and lichen before the wash, so the growth dies at the root and is slower to come back
- Hot water at up to 80°C, at a pressure set for the surface in front of us
- A rotary flat-surface cleaner on open areas, for an even finish with no stripes
- Joints on block paving refilled with kiln-dried sand
- The loose moss, weeds and grit lifted by the wash swept up and taken away
- All the machines, products and equipment
The rotary cleaner is the part most people have not seen. It is a spinning head inside a hood that sits flat on the ground, so the jet stays at the same distance and angle all the way across the driveway. A hand lance that lingers in one spot is what leaves the light and dark stripes you see on some freshly washed drives.
The surfaces we pressure wash
Driveways
We wash block paving, concrete, tarmac and resin-bound drives. Driveway dirt is mostly diesel residue and moss in the joints, with lichen on older drives, and hot water at high pressure dissolves it and lifts it off. Block paving is where most DIY damage happens: blast it from too close and the sand comes straight out of the joints, and over time the blocks start to move. That is why every block paving job ends with fresh sand brushed back in.
Patios
Sandstone, limestone, slate, granite, porcelain, concrete slabs, brick pavers and old crazy paving all come up well. Soft and porous stone gets a gentle wash, with the biocide doing most of the work. Our guide to cleaning a patio sets out what each stone can take if you are doing it yourself. Black spots on sandstone are lichen with a root system, and a pressure washer alone does not kill it, so it gets its own treatment first (more on that in the questions below).
Garden paths
Paths get the same treatment as the patio they lead to, and the joints are cleaned out along the way. If the mortar between the slabs has crumbled, washing will show it up. We do not re-point, but we will tell you what needs doing.
Decking
Softwood, hardwood and composite decks each need a different approach. We use a decking detergent to lift the grey or green layer, keep the pressure low and work along the grain with a fan nozzle. Too much pressure on softwood leaves it furry for good. Some decks have gone past washing and need re-staining; if yours is one of them, we say so before we start.
What pressure washing is
Pressure washing (jet washing) is cleaning a hard outdoor surface with a narrow jet of water at high pressure, usually after a detergent or biocide has loosened the growth. The jet strips off what sits on top of the surface: moss, algae, dirt and the film that turns a patio grey. On a sound surface, you see the result straight away.
Some things a pressure wash will not do:
- Kill old lichen and black spot on its own. The biocide needs time, and very old, deep-set black spot can leave faint shadows even after treatment.
- Fix loose slabs, crumbling mortar or sunken blocks. Washing often makes those faults easier to see.
- Replace stain or oil on weathered decking.
- Stop growth for ever. North-facing patios, and anything under trees, go green fastest.
A domestic pressure washer from a DIY shop can shift a bit of moss if you have the afternoon. It runs cold, and it is easy to hold too close. Held in one spot for a few seconds, the nozzle can mark sandstone for good, which is why we set the pressure for each surface.
Pressure washing compared with hard-floor cleaning
The same price list carries three services. Only the first is done outside.
| Service | Price | Where it is done |
|---|---|---|
| Pressure washing | £4 per m² | Outside: patios, driveways, paths, decking |
| Hard-floor cleaning | £6 per m² | Inside: hard floors such as tile, stone and wood |
| Floor clean and polish | £8 per m² | Inside: hard floors cleaned, then polished |
Indoor floors are a separate booking. You can read about them on our floor cleaning page, and every service we run is priced on the prices page.
Booking a pressure wash, step by step
Measure and ring. Call 0333 555 2076 with the rough length and width of each area, what the surface is and how bad it looks. We work out the price with you on the phone.
Pick a day. We work seven days a week, weather permitting. Light rain is fine. In heavy rain or a thunderstorm we move the booking to a better day.
Water and power. We need a working outside tap and a standard socket. If either is missing, tell us when you book.
Biocide first, then the wash. Growth is treated first. Then comes the hot-water wash, with the rotary cleaner on open areas and a lance on edges, steps and corners.
Sand and a last look. Block paving gets its kiln-dried sand, the debris is cleared and, if you are home, we walk round the finished area with you.
After the wash, the surface wants 24 to 48 hours of dry weather to settle properly, so we try not to book a job for the day before heavy rain is forecast.
Who does the work
4.7 on Google. See what customers say on our Google profile.
Checked before they work alone. Each cleaner is interviewed in person and insured, and trained before they work on their own.
Trading since 2014. More than 40,000 properties cleaned across London, Liverpool and Manchester, and 300+ letting agents work with us.
Booked on one call. The line is open 8am to 7pm, seven days a week, and the price is worked out with you while you are on the phone.
Call 0333 555 2076 for a priceWhatsApp
Jobs that go well with a pressure wash
Windows are the obvious one. The outside of the house is being worked on anyway, so it makes sense to book window cleaning for the same day.
Building work usually leaves cement splashes, paint and mortar drops on the patio and the drive. They are far easier to shift in the first month than after a winter of rain, and they pair well with an after-builders clean of the inside.
For forecourts, car parks, restaurant terraces and building entrances, see our commercial cleaning page; that work is often done out of hours to keep trade going.
Pressure washing questions
How do I measure my patio or driveway?
Measure the length and the width in metres and multiply them. A patio 5 m long and 4 m wide is 20 m², which is £80. Split an L-shape into two rectangles and add them up. If the shape is awkward, a rough figure is enough to talk it through on the phone.
Will pressure washing damage my block paving?
Not when it is done properly. The risk with block paving is blowing the sand out of the joints, which lets the blocks shift over time. The rotary cleaner keeps the jet at a set angle and distance, and we refill the joints with kiln-dried sand as standard.
Can you get rid of the black spots on my patio?
Usually, yes. Black spot is lichen, and blasting alone does not kill it. We treat it with a specialist biocide, leave it about 48 hours and then wash. Most cases clear fully. Very old, deep-set spots can leave faint shadows, and we tell you on the day if yours is one of those.
How often does a driveway or patio need washing?
Every 12 to 24 months suits most driveways and patios. North-facing ones, anything under trees and damp spots can need it every year. A south-facing patio in a dry spot can go three years.
Do I need to be at home?
No. We need to reach an outside tap and a socket, so leave the side gate open or arrange access when you book. If you would like to see the finished job, tell us and we will walk round it with you.
What happens if it rains on the day?
Light rain does not stop the job. In heavy rain or a storm we move the booking, and we check the forecast the day before so you are not left waiting.
Where does the dirty water go?
On a home driveway or patio the water runs to the existing drainage, and we hold back the worst of the debris and sweep it up. On commercial sites we can collect the waste water with a wet vacuum.
Measure the area, multiply by £4 and ring 0333 555 2076 to book the day.