Drainage Unblocking Costs UK — Drain Jetting, CCTV Survey and Drain Repair Pricing Guide (2026)

UK drainage costs at a glance (2026)

Prices are UK averages for 2026. London and South East typically 20–30% higher. Emergency out-of-hours rates add a further 50–100%.

Emergency drain unblocking: £80–£200 call-out

Most drainage companies charge a fixed call-out fee that covers mobilisation, travel, and the first diagnostic assessment on-site. This is separate from — and additional to — the cost of the actual work carried out.

• Daytime call-out (8am–6pm weekdays): £80–£150
• Evening call-out (6pm–10pm): £120–£200
• Out-of-hours (10pm–8am, weekends, bank holidays): £150–£300+

Emergency pricing is standard practice and customers calling at midnight broadly understand it. State the out-of-hours rate clearly when you take the call — customers who object would have objected in daylight too, and it's better to know before you drive.

For drainage companies, the call-out fee structure matters commercially: it filters low-intent enquiries, covers the van run on jobs that turn out to be quick fixes, and sets a professional tone from the first interaction.

High-pressure water jetting: £100–£350

High-pressure water jetting is the standard treatment for most drain blockages. A pump forces water at up to 4,000 psi through a nozzle pulled through the drain, breaking up and flushing out fat, grease, silt, and soft root masses. It's faster and more thorough than rodding for anything beyond a basic obstruction.

Pricing depends on run length, pipe diameter, blockage severity, and access. Typical ranges:

• Short residential run (up to 10m, simple blockage): £100–£180
• Standard residential drain (10–30m): £150–£280
• Longer run or stubborn blockage: £250–£350
• Commercial drain jetting: £200–£600+ depending on pipe size and run length

These figures are for the jetting work itself, on top of any call-out charge. For most residential jobs, the total bill — call-out plus jetting — lands between £200 and £400.

A common contractor mistake is quoting jetting as an all-in price and not leaving room to charge for CCTV if the camera reveals a structural problem. Quote jetting and survey as two line items from the start.

CCTV drain survey: £100–£300 residential, £300–£600+ commercial

A CCTV drain survey sends a camera through the drain to produce a recorded video report, typically with a written condition assessment. It's both a diagnostic tool and a commercially valuable deliverable — homeowners buying or selling a property, landlords after a persistent recurring blockage, and insurers processing escape-of-water claims all need one.

• Standard residential survey (single-property drain): £100–£200
• Extended residential survey (including lateral drain investigation): £200–£300
• Pre-purchase survey (property transaction): £150–£300 including written report
• Commercial survey (light industrial, restaurant, small commercial premises): £300–£450
• Large commercial or multi-unit survey: £450–£600+

What a survey report will show: root ingress and location, pipe cracks and fractures, open or displaced joints, deformed or collapsed sections, silt and grease deposits, and misconnections (surface water draining into the foul sewer — a common finding in older properties).

The survey is the gateway to remediation work. A £150 CCTV survey that reveals root ingress becomes a £500 root-cutting job or a £2,000 lining job. Contractors who routinely include CCTV in their standard response — rather than treating it as an optional extra — consistently win more remediation work.

Root cutting: £200–£500

Tree and shrub roots find microscopic cracks in older clay or concrete pipes and grow into the bore over years. High-pressure jetting alone won't shift a root mass — a specialist root-cutting nozzle or electro-mechanical cutter is needed.

• Root cutting (jetting nozzle method, light ingress): £200–£350
• Mechanical root cutting (heavy root mass): £300–£500

Root cutting clears the drain but does not fix the crack that let the roots in. Always follow up with a CCTV survey to assess whether relining is needed. A drain that has suffered root ingress once will suffer it again unless the structural defect is addressed.

Drain lining: no-dig repair at £300–£800 per metre

Cured-in-place pipe (CIPP) lining — also called drain relining — is the most significant development in drainage repair in the past two decades. Instead of digging up a damaged pipe, a resin-saturated felt liner is inserted through the existing drain and inflated against the pipe wall. Heat, steam, or UV light cures the resin to form a new structural pipe inside the old one. No excavation, no surface reinstatement, far less disruption.

Drain lining costs

• Patch liner (localised repair, single defect): £300–£800 per patch
• Full CIPP lining — residential (per metre): £300–£800/m
• Typical full-length house drain (8–12m liner): £2,500–£6,000
• CIPP lining — commercial, large-diameter pipe: £500–£1,200/m+

Drain lining vs excavation

For most cracked, root-damaged, or joint-displaced drains that retain their basic shape, CIPP lining delivers the same long-term fix at lower total cost and far less disruption. Excavation is the right answer when the pipe has fully collapsed, where access prevents liner insertion, or where multiple connected defects make full replacement more economical.

Excavation and pipe replacement: £3,000–£10,000+

When a pipe is too far gone for relining — full collapse, severe offset joints, or sections that have dropped significantly from their original gradient — excavation is necessary. This is the highest-value drainage work but carries the most complexity.

• Garden or driveway excavation (standard depth, 3–5m run): £3,000–£6,000
• Footpath crossing or road excavation (requires council permit): £5,000–£10,000+
• Deep excavation (over 1.5m, requiring shoring): Add £1,000–£3,000
• Road opening permit (council fee): £200–£500 per application
• Reinstatement (tarmac, block paving, concrete): Priced separately based on area

Never quote excavation work without a CCTV survey first. Groundwater level, proximity to foundations, the condition of adjacent pipe lengths, and the presence of other services underground all affect the programme and cost significantly. A contractor who quotes blind on excavation is exposed to serious scope creep and margin erosion.

Other drainage services and costs

Septic tank emptying: £150–£350

Properties not connected to the mains sewer rely on septic tanks or treatment plants. Septic tanks require emptying typically once a year, though this varies by household size and usage. Prices:

• Standard septic tank empty (up to 3,000 litres, easy access): £150–£250
• Larger tank or difficult access: £250–£350+
• Cesspit emptying: £150–£300 per visit (cesspits fill faster and need more frequent emptying)

Septic tank emptying is a recurring revenue opportunity. Drainage contractors who build a register of rural and semi-rural properties and contact them proactively ahead of the emptying season turn a one-off job into a reliable annual income stream.

Drain mapping: £200–£600

Drain mapping combines a CCTV survey with GPS location data to produce a scaled plan showing where drains run under a property. Needed for planning applications, building regulations, extensions near sewers, and insurance assessments.

• Single residential property: £200–£350
• Multi-unit or commercial site: £350–£600+

What causes drain blockages?

Understanding the cause matters for quoting accurately and for giving the customer practical advice that reduces repeat call-outs.

• Fat, oil and grease (FOG) — the most common cause in kitchen drains. FOG cools and solidifies on pipe walls, gradually constricting flow. High-pressure jetting clears it; the customer needs to change habits or it returns.
• Wet wipes — marketed as 'flushable' but they don't break down in drains. A leading cause of toilet and sewer blockages. Rodding or jetting removes them; customer education prevents recurrence.
• Tree and shrub roots — roots find microscopic cracks in older clay or concrete pipes and grow into the bore over years. Requires root cutting, then CCTV assessment, then likely relining.
• Collapsed or broken pipe — ground movement, vehicle loading, settlement, or simple age causes pipes to crack or deform. A survey is essential before quoting any repair.
• Foreign objects — toys, sanitary products, cotton buds. Mechanical rodding or jetting with retrieval tools.
• Scale and mineral buildup — common in hard-water areas. Descaling nozzles on a jetter deal with light buildup; heavy scale may need chemical treatment first.

Signs of a serious drain problem vs a simple blockage

Not every slow drain needs a contractor. But these signs suggest something more significant than a surface blockage:

• Multiple fixtures draining slowly at the same time (suggests the blockage is in the main drain, not an individual branch)
• Gurgling sounds from toilets or shower drains when another fixture is used
• Sewage smell inside the property, especially in ground-floor bathrooms
• Sewage backing up through manhole covers or external gullies
• Damp patches on ground-floor walls or floors near drainage runs
• Repeated blockages in the same location despite professional clearance
• Subsidence or sunken areas in the garden or driveway above a drain run

Any of these warrants a CCTV survey before jetting — jetting a structurally compromised pipe can make the damage worse.

External vs internal blockages — who is responsible?

This is one of the most common points of confusion for homeowners. The boundary matters for who pays.

• Private drain (within the boundary, serving only that property) — homeowner's responsibility in full.
• Lateral drain (outside the property boundary, running to the public sewer) — the water company's responsibility since the Water Industry Act 2011.
• Public sewer — water company's responsibility entirely.
• Shared private drain (serving more than one property, not yet adopted by the water company) — shared responsibility of all connected homeowners. Can be complicated to resolve without legal advice.

If a CCTV survey establishes that the problem is in the lateral drain or public sewer, the homeowner contacts their water company. Your time to diagnose that is still billable — the CCTV footage is the evidence. Document the location of any defects with reference to the property boundary.

DIY drainage methods: what works and what doesn't

Plunger

Works well on sink and basin blockages where the obstruction is close to the plug hole. A cup plunger for flat-bottom basins, a flange plunger for toilet pans. Not effective on blockages more than a metre or two down the line.

Drain rods

Effective on accessible outdoor drains with a clear obstruction. Screw the rods together, feed through the manhole, and rotate clockwise only — anticlockwise can unscrew the sections inside the drain, leaving rods in the pipe. Drain rods won't shift fat or root ingress and can damage already-fragile pipe if forced.

Chemical drain cleaners

Limited effectiveness on anything other than light grease in sink traps. Caustic or enzymatic products don't shift wipes, roots, or physical blockages. Some caustic products can damage older pipework or seals. Not a substitute for jetting on a real blockage.

When to call a professional

If a plunger doesn't clear a blockage in two or three attempts, or if the problem is in an external drain or main line, call a drainage contractor. Repeated attempts with rods on a fragile pipe risk making a manageable lining job into a full excavation.

Choosing a drainage company: NADC, CHAS, WaterSafe

The drainage sector is unregulated in the way that gas (Gas Safe) or electrical (NICEIC/NAPIT) work is. That makes accreditation schemes more important, not less.

• NADC (National Association of Drainage Contractors) — the primary trade body for professional drainage contractors. Members must meet competency and insurance standards. A meaningful mark of professionalism.
• CHAS (Contractors Health and Safety Assessment Scheme) — relevant for commercial and public sector clients. Demonstrates that the contractor meets health and safety pre-qualification requirements.
• WaterSafe — for drainage work that crosses into plumbing of cold water supply or hot water systems. Less directly relevant for drain-only work but a good general mark of quality for plumber-drainage contractors.

Beyond accreditations: look for contractors who quote in writing, carry public liability insurance of at least £2 million, and provide a CCTV report as standard on any survey work rather than just a verbal assessment.

Red flags when getting drainage quotes

• No survey before quoting major remediation work — any contractor quoting excavation or relining without a CCTV survey is guessing at scope. Insist on survey first.
• Cash-only quotes — legitimate drainage contractors invoice properly and accept bank transfer or card. Cash-only is a sign of either an uninsured operation or an inflated price.
• Verbal-only quotes — all quotes should be in writing, specifying what work will be done, what materials will be used, and what the guarantee covers.
• Vague guarantee terms — a lining job should come with a minimum 10-year guarantee on the liner. Get it in writing.
• Pressure to approve work on the spot — high-pressure tactics at 11pm when you're dealing with a sewer backup are a classic feature of rogue drainage operators. Get a second opinion in the morning for anything over £500.

Quoting guide for drainage contractors

If you're a drainage contractor, here is how to structure your quoting process to win work at the right margin.

Survey first, always

Make the CCTV survey a default part of your response, not an upsell. A survey call-out is a billable job in itself, and it protects you from quoting blind on remediation. Frame it to the customer as 'we'll jet the drain clear and put the camera through so you know exactly what you're dealing with' — not as two separate purchases.

Bundle CCTV with jetting

A combined jet-and-survey package (£250–£450 typical all-in residential) converts better than quoting jetting alone. You're on-site anyway. The survey takes 30 minutes. The footage gives you the evidence to quote remediation work that might be worth £2,000–£8,000. The economics are obvious.

Itemise your quotes

Break out: call-out, jetting, CCTV survey, root cutting, liner supply and install, surface reinstatement. Itemised quotes are easier to approve — customers can see what each element costs and can make informed decisions about what to proceed with. Lump-sum quotes invite haggling.

Track your job types separately

Emergency reactive call-outs and planned remediation work are very different in margin, lead time, and source. A contractor who conflates the two in their P&L can't tell whether their Google Ads are winning emergency jobs or survey conversions — which means they can't optimise spend or staff accordingly.