CLEARMASTERS
Blocked drains and CCTV surveys
We clear blocked drains in terraces and flats with high-pressure jetting and survey them with CCTV to find the cause.
Learn moreLewisham sits where the River Ravensbourne and the Quaggy meet, in a valley that has flooded many times over the years. Flood defences and parks have helped, but low-lying streets, basements and chambers can still take on water after very heavy rain, and that’s when our tankers are needed.
The borough is mostly Victorian and Edwardian terraces, inter-war estates and new developments around Lewisham’s town centre, many with pump stations. The high streets of Lewisham, Catford and Brockley have restaurants and takeaways with grease traps to empty.
Our crews work in south-east London most days and we answer the phone 24 hours a day, 365 days a year.
Our Lewisham drainage services
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Blocked Drains & CCTV Surveys
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Flood & Groundwater Removal
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Pump Station Servicing
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Grease Traps & Commercial Waste
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Septic Tank Surveys
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Gullies & Interceptors
Learn moreCovering
Lewisham
Lewisham
24/7
call-outs
call-outs
Homes &
businesses
businesses
Waste transfer
notes
notes
Own tanker
fleet
fleet
What we do for Lewisham customers
Flood water removal
When heavy rain floods a basement, cellar, chamber or car park, our tankers pump it out and take it away. Afterwards we can jet and survey the drains.
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Pump stations in new developments
New blocks around the town centre often rely on pump stations. We service them for managing agents and respond 24/7 when one fails.
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Grease traps and gullies
Restaurants and takeaways need grease traps emptied; yards and car parks need gullies cleaned. We set up regular schedules with waste transfer notes.
Learn moreLocal knowledge
Drainage in Lewisham: what to know
Two rivers in a valley.
The Ravensbourne and Quaggy
Low ground near the rivers can flood after very heavy rain. Clear gullies and working pumps help.
New developments
Blocks around Lewisham’s centre often have private pump stations looked after by managing agents.
Old terraces
Victorian drains crack and let roots in. Repeated blockages are worth a survey.
Local to you
Areas we cover in and around Lewisham
We cover Lewisham and the neighbouring parts of south-east London.
Lewisham · and neighbourhoods
- Lewisham
- Catford
- Ladywell
- Hither Green
- Brockley
- Lee
- Blackheath
- Crofton Park
Surrounding areas · homes and businesses we cover
- Deptford
- New Cross
- Forest Hill
- Sydenham
- Grove Park
- Bellingham
- Downham
- Eltham
- Greenwich
- Peckham
- Honor Oak
- Beckenham
Not sure if we cover you?
If you’re in or around Lewisham, we cover you. Call with your postcode and we’ll confirm.
Nearby areas
Why Lewisham customers use us
Ready when the water rises
Whether it’s a flooded basement in Catford or a pump station in a new block, here’s what you can expect.
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Day and night, all year
Emergency call-outs 24 hours a day, 365 days a year, with a real person answering the phone.
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The right kit for the job
Tankers from 2,000 to 4,000 gallons, jet/vac combination units, CCTV survey kit and confined space teams for pump station wet wells.
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Trained engineers
Our engineers and most of our tanker drivers hold current confined space entry certificates, and the engineers carry the most common parts.
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Paperwork done properly
A waste transfer note with every collection, and a written report after surveys and services.
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One call for everything
Tanks, treatment plants, pump stations, grease traps and drains, all handled by one team.
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34 years in drainage
We’ve been emptying tanks and servicing systems since long before most of the kit on the market existed.
What our customers say
9.84/10
Checkatrade
From 134 reviews · Read them
4.9/5
From 63 reviews · Read them
Scores as of September 2026
★★★★★We've been using Clearmasters for several years now and they've been great. We're in a tricky area to get to but they always make a plan without complaint. Great team! Highly Recommended.
Trevor M. Google review
★★★★★Had a very good experience with Clear Masters. They provide an excellent, professional service, friendly and helpful, on time as per the agreed price
★★★★★I have used this business for several years now and they have consistently provided outstanding service.. Every member of staff has been friendly, competent and professional. Very impressive.
How it works
What happens when you book
The same simple process for every job.
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Step 1
Tell us what you’ve got
Call us or book online and tell us what’s happening. If there’s flooding, tell us roughly where and how much.
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Step 2
We come out and do the job
We send the right tanker, van or engineer. It helps if:
- manhole covers are clear of cars, bins and planters
- there’s somewhere nearby for our van or tanker to park
- you tell us about shared drains or neighbours who are affected
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Step 3
Paperwork and the next visit
You get a waste transfer note for anything we take away, and a written report after a survey or service. If it’s a regular job, we’ll remind you when the next one is due.
Free, no-obligation quote
Get a quote for your Lewisham property
Tell us what you need and we’ll come back with a price. If you’re flooding now, call us instead.
- Free quotes for drains, pumps and grease traps
- Flood water removal
- Reports for managing agents
Urgent?
03333 233566
Questions answered
Lewisham drainage FAQs
What homeowners, agents and businesses in Lewisham ask us most.
Can you pump out a flooded basement?
Yes. Our tankers can remove the water and take it away, and we can check the drains and pumps afterwards.
How can I reduce the risk of my basement flooding?
Keep gullies and drains around the house clear, and if you have a sump or basement pump, make sure it’s serviced and has a working alarm.
Do you service pump stations in new blocks?
Yes, on a planned schedule, with reports for the managing agent and 24/7 cover.
Do you empty grease traps in Catford and Lewisham?
Yes, for restaurants, cafés and takeaways.
Our terrace drain blocks every few months. Why?
Often roots or a cracked or sagging section. A CCTV survey will show what’s wrong.
Are you available during storms?
Yes. We answer the phone 24 hours a day, 365 days a year. Call 03333 233566.
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.