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Drainage Services in Surrey

Blocked drain clearance, CCTV surveys and drain repairs across 31 Surrey towns. 24/7 emergency response, fixed upfront pricing.

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Local drainage notes for Surrey

Region-specific guidance on water suppliers, responsibility, building regulations and drain ownership — sourced from Ofwat, Defra, the Planning Portal and Thames Water.

Who is the water and sewerage company for Surrey?

Thames Water is the water and sewerage undertaker for Surrey, regulated by Ofwat (the economic regulator), the Drinking Water Inspectorate (DWI) for water quality and Defra for policy.

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Their main customer line is 0800 980 8800. Parts of south-east Surrey (Caterham, Oxted, Lingfield) are served by SES Water for water supply only — sewerage is Thames Water across most of the county, with the Lingfield area on the Sussex border served by Southern Water. Check the Ofwat boundary map for the exact split at your postcode.

Source: dwi.gov.uk

Who's responsible for a blocked drain in Surrey — homeowner, landlord, tenant, or Thames Water?

Most of Surrey is served by Thames Water for sewerage (regulated by Ofwat under the Water Industry Act 1991), with parts of the south-east of the county (around Caterham, Oxted and Lingfield) covered by SES Water for water supply only.

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Sewerage is Thames Water across most of the county, with the Lingfield area on the Sussex border served by Southern Water. Thames Water maintains public sewers and lateral drains beyond the property boundary; homeowners and landlords are responsible for everything inside it. Citizens Advice publishes the canonical consumer-facing summary of drain and sewer ownership.

Source: citizensadvice.org.uk

Do I need building regulations approval (Part H) for a drain repair in Surrey?

Drain repairs in Surrey must satisfy Building Regulations Approved Document Part H, enforced locally by Building Control at the relevant Surrey borough or district council (Guildford, Waverley, Mole Valley, Reigate & Banstead, Tandridge, Epsom & Ewell, Elmbridge, Spelthorne, Runnymede, Surrey Heath or Woking).

Related services: drain repair services

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From 1 April 2027 these will be replaced by two unitary councils — East Surrey Council and West Surrey Council — under the Surrey (Structural Changes) Order; until then the existing 11 councils continue to run Building Control. A like-for-like repair usually doesn't need an application, but a building notice or full plans submission is needed for re-routing, deeper excavation, or any change to the connection into a public sewer. Always check with your local council building control before work begins.

Source: planningportal.co.uk

Are pitch fibre drains common in Surrey?

Patchy across the county — Surrey's housing skews older and more affluent than the average, so pre-war pebble-dash semis and 1930s detacheds (which still use clay) dominate.

Related services: drain repairs · CCTV drain survey

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Pitch fibre concentrates in the post-war commuter expansions: parts of Camberley, Frimley, Worcester Park, Stoneleigh and the New Malden border, plus the council estates around Guildford and Woking built between roughly 1955 and 1975. Where present, the failure mode is the same — the pipe deforms to an oval cross-section and traps debris, so any rear-extension owner whose drains keep blocking within a fortnight of a clear should ask for a CCTV survey to check the pipe material before paying for another jetting. Lining is usually viable; full dig only where the section has collapsed.

Source: sava.co.uk

Read more on our blog: /blog/do-you-have-pitch-fibre-pipes/

What are the build-over rules for drains in Surrey?

Thames Water requires a build-over agreement before any construction within 3m of a public sewer, or within 1m of a public lateral drain.

Related services: CCTV drain survey

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Apply via Thames Water Developer Services before excavation; a pre-construction CCTV survey and a structural method statement are typically required. Thames Water categorises applications by sewer diameter into Class 1, 2 or 3 (sewers 375mm or larger fall into Class 3, requiring legal agreements). Thames Water's published timing runs from around 3 to 9 months or longer end-to-end, depending on complexity. Surrey's stockbroker-belt housing — large detached properties with rear-garden extensions — generates a high volume of build-over applications; skipping the agreement can void building control sign-off and leave the owner liable for diversion costs.

Source: thameswater.co.uk

Last verified 25 May 2026.

Recent Work in Surrey

FOG deposits inside the 100mm foul drain before jetting
CCTV Drain Survey

High-pressure water jetting and CCTV investigation — grease-related blockage clearance

Issue:

The customer in Kingston upon Thames reported restricted foul drainage serving the property. Wastewater was discharging slowly, suggesting a developing obstruction likely caused by fats, oils, and grease (FOG) within the 100mm foul line.

Outcome:

Full flow reinstated. Channels were cleared of FOG residues, and the foul line was operating normally. All chambers were left clean and free-flowing.

KT1
Blocked manhole full of foul waste at a Worcester Park property.
Drain Clearance

Foul Manhole Blockage Cleared – KT4, Worcester Park, Surrey

Issue:

A severe blockage in a foul manhole at a property in Worcester Park (KT4) caused wastewater to rise close to ground level, posing an immediate hygiene and contamination risk.

Outcome:

Free‑flow restored, foul water drained away correctly, and contamination hazards were removed.

KT4
Blocked manhole containing sanitary waste prior to clearance at a property in Sutton, London.
Drain Clearance

Blocked Manhole Cleared Following Sanitary Waste Build-Up in Sutton, London

Issue:

A blocked manhole was reported at a residential property in Sutton, causing restricted drainage flow.

Outcome:

The manhole was successfully cleared and normal drainage function was fully restored.

SM2
Internal pumped toilet waste line cleared — Surbiton
Drain Clearance

Toilet Outlet Restriction Cleared — Surbiton, Greater London

Issue:

A property in KT6 experienced slow discharge from a pumped toilet system, with foul water taking longer than normal to clear from the bowl.

Outcome:

The toilet discharged normally again, restoring full functionality and eliminating foul water exposure risk.

KT6
Kitchen wastewater backing up due to grease blockage in GU25 Virginia Water.
Drain Clearance

Kitchen Drain Blockage Cleared – GU25, Virginia Water, Surrey

Issue:

A kitchen drain at a property in Virginia Water (GU25) became fully obstructed, with wastewater backing up into the sink and causing a hygiene concern.

Outcome:

Kitchen fully operational again with wastewater draining freely and no further backup into the sink.

GU25
Kitchen sink waste line in Woking showing internal buildup of food waste and grease.
Drain Clearance

Kitchen Sink Cleared – GU22, Woking, Surrey

Issue:

A property in Woking (GU22) experienced a backed-up kitchen sink, with wastewater sitting in the bowl and normal use impossible.

Outcome:

The kitchen sink now drains freely with no standing water before departure.

GU22

Towns We Cover in Surrey

AddlestoneAshfordAshteadBansteadCamberleyCaterhamChertseyCobhamEast MoleseyEghamEpsomEsherFarnhamGodalmingGuildfordHaslemereHorleyLeatherheadRedhillReigateSheppertonStainesSunbury On ThamesTadworthThames DittonWalton On ThamesWest ByfleetWest MoleseyWeybridgeWhyteleafeWoking