CLEARMASTERS
Surrey is home for us. Our office is in Smallfield, near Horley, and our tankers are based a few miles away in Copthorne, so towns like Horley, Redhill, Reigate and Oxted are on our doorstep. From there our crews cover the whole county most days, with our own tankers and engineers.
Surrey looks green and gentle, but its drainage is anything but uniform. The south is heavy Weald clay where drainage fields flood every winter. Across the middle run the sandy greensand hills and the chalk of the North Downs, much of it in the Surrey Hills. The north is London Clay and the Thames floodplain, with big homes, basements and business parks.
Every town below has its own page explaining what we see there and which villages we cover. Wherever you are, you get the same team, the same paperwork and the same 24-hour phone line.
Our services in Surrey
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Septic Tank & Cesspit Emptying
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Treatment Plant Servicing
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Pump Station Servicing
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Blocked Drains & CCTV Surveys
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Grease Traps & Commercial Waste
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Gullies & Interceptors
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Local knowledge
What drainage looks like in Surrey
Clay, sand, chalk and river gravels, all in one county.
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Weald clay in the south
Around Horley, Lingfield, Newdigate and Capel, heavy clay drains slowly. Drainage fields struggle in wet winters and many older homes still rely on cesspits.
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Greensand hills
From Reigate to Dorking, Godalming and Haslemere, sandy greensand usually drains well, but steep lanes and long drives make access part of the job.
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The chalk of the North Downs
Around Caterham, Banstead and the Downs villages, the chalk drains freely but supplies drinking water, so private systems must work properly.
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London Clay in the north
In Epsom, Esher, Cobham and Leatherhead, the clay shrinks and swells with the seasons, cracking older drains.
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The Thames and the Wey
Chertsey, Weybridge and Sunbury sit on low gravels where river and groundwater flooding can fill basements, chambers and tanks in very wet winters.
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Surrey Hills National Landscape
Large parts of the county are protected landscape, so new or replacement drainage can need careful planning.
Local to you
Towns we cover in Surrey
Every town below has its own page, and we cover the villages around each one.
What our customers say
Checkatrade
From 134 reviews · Read them
From 63 reviews · Read them
Scores as of September 2026
★★★★★Excellent service from start to finish. The team came out to empty our septic tank and were professional, efficient, and clearly knew exactly what they were doing. They arrived when expected, got the job done quickly and thoroughly, and left everything clean and tidy afterwards. It’s refreshing to deal with a company that provides such reliable service and takes real pride in doing the job properly.
Checkatrade review Checkatrade · RH6
★★★★★Friendly, efficient and helpful, also gave good practical advice
★★★★★Clearmasters always carry out the periodic emptying of the septic tank, on time and with no inconvenience to ourselves. Invoicing is via e-mail with all the back up information provided. We have been using Clearmasters for many years and have never had any issues. Friendly, reliable people to deal with
Not sure if we cover you?
If you’re anywhere in Surrey, we do. Call with your postcode and we’ll give you a date.
Neighbouring areas
Questions answered
Surrey septic tank and drainage FAQs
Where are you based?
Our office is at Rough Beech Court in Smallfield, near Horley, and our tankers are kept at our yard in Copthorne, just over the West Sussex border. Surrey is home ground for us.
Do you cover the whole of Surrey?
Yes. Our crews work across the county most days, from Oxted and Caterham in the east to Farnham, Camberley and Haslemere in the west, and from Sunbury and Esher down to the Sussex border.
My drainage field floods every winter. Is that normal?
On the Weald clay in the south of the county, it’s common. Clay holds water, so fields can be saturated for months. Regular emptying keeps solids out of the field; if it never recovers, a survey will show whether it needs extending or replacing.
Do I need planning permission for a new treatment plant in the Surrey Hills?
Sometimes. Check with your local council before work starts, and make sure the system meets the Environment Agency’s General Binding Rules or has a permit.
Who looks after the pump station on my estate?
If the water company hasn’t adopted it, usually the management company. We service estate and private pump stations across Surrey and respond 24/7 if the alarm goes off.
Got a different question? Call 03333 233566 or send us a message.
Fully accredited & compliant
We're independently vetted and certified so you can trust who you're letting onto your site.
SafeContractor
Health & safety pre-qualification accreditation, verifying our processes meet recognised safety standards.
RISQS
Railway Industry Supplier Qualification Scheme — approved to work safely within the rail industry supply chain.
Achilles UVDB
Utilities Vetting Database membership, confirming we meet the utilities sector's supply chain standards.
Trading Standards Approved
Vetted and approved under the local authority's trusted trader scheme for honesty and fair dealing.
NADC Member
Members of the National Association of Drainage Contractors, the UK trade body for the drainage industry.
Registered Waste Carrier
Registered with the Environment Agency, so your waste is handled and disposed of fully within the law.