How Much Does Roof Cleaning Cost in the UK?

Most UK roof cleaning jobs cost somewhere between about £350 and £900, with a typical three-bed semi coming in around £400–£600. The exact figure depends on the size and pitch of your roof, how much moss and algae has built up, the tile type, and access. Below, I'll break down exactly what you're paying for so you can judge whether a quote is fair.

These are 2026 guide prices from our day-to-day work across West Sussex — every roof is different, so treat them as a starting point, not a fixed menu.

Typical UK roof cleaning prices

Property	Rough price range
Terraced house (small roof)	£250 – £450
Three-bed semi	£400 – £600
Detached house	£600 – £900
Large or complex roof (multiple pitches, steep)	£900+

A simple biocide-only soft wash — where we apply a treatment that kills the moss and algae and lets the weather clear it over the following weeks — usually sits at the lower end. A full clean that physically removes thick moss, clears the gutters of debris and then treats the roof to slow regrowth sits higher, because it's more labour and more time on the roof.

What actually drives the cost

• Roof size and pitch. More square metres means more time. A steep roof needs more access equipment and slows the work down, which adds cost.
• How bad the build-up is. A light algae stain is quick. Years of thick, spongy moss along every tile course takes far longer to clear and dispose of.
• Tile type. Concrete, clay, slate and flat roofs all behave differently. Delicate or brittle tiles need a gentler, slower approach.
• Access. A clear, flat site is straightforward. Conservatories, extensions, tight side returns and limited parking all make a job harder.
• Method. A safe soft wash or steam clean costs a little more than blasting a roof with a pressure washer — but it's the right call (more on that below).

Why you should never let anyone pressure wash your roof tiles

This is the single most important thing in this guide. A high-pressure jet can strip the protective surface off concrete and clay tiles, force water under them, and dramatically shorten the life of your roof. We see the damage from it regularly.

A proper job uses low-pressure soft washing or chemical-free steam, paired with a certified biocide to kill the spores and slow regrowth. It costs a touch more than a quick blast, but it protects the roof you're paying to clean. You can read how we approach it on our roof cleaning page.

Is roof cleaning worth it?

For most homes, yes — and not just for looks:

• It's preventative. Moss holds moisture against the tiles and lifts them at the edges, which over time causes leaks and frost damage. Clearing it is far cheaper than remedial roof repairs.
• Blocked valleys and gutters. Moss washes down into the guttering and blocks it. A roof clean plus a gutter clear sorts both in one visit.
• Kerb appeal. A clean roof noticeably lifts the whole property — useful if you're selling.

How to get a fair quote

• Get the quote in writing, with the method named (soft wash / steam, not "pressure wash the roof").
• Check it includes moss removal, gutter clearing of the debris, and a biocide treatment — not just one of the three.
• Make sure they're insured for working at height.
• Be wary of a price that sounds too cheap. It usually means a quick chemical splash with no physical clearing, or — worse — a pressure washer.

Coastal homes around Chichester, the Witterings and Selsey grow moss and algae faster because of the damp, salt-laden air, so a treatment that slows regrowth earns its keep here.

If you'd like a real figure for your roof rather than a range, send us a couple of photos and your postcode and we'll give you a free, no-obligation quote.

Need this done properly? See our roof cleaning service across Chichester and the harbour villages — or get a free quote.