How to Price Drain Unblocking and Clearance: Labour and Margin Guide

Quick Answer: UK drain unblocking typically prices at £80-£180 for a simple rod clearance in working hours, £150-£400 for high-pressure water jetting, and £180-£500 for a CCTV survey, with combined clear-plus-survey call-outs commonly £250-£600 and out-of-hours emergencies carrying a £150-£350+ premium. The going day rate for a drainage engineer is £180-£320 regional and £260-£420 in London. This is high-frequency, high-margin emergency work, but two things govern the price: whether the blockage is on the customer's private drain or a lateral drain/shared sewer the water company should clear free (Water Industry Act 1991, 2011 transfer), and whether you're clearing a blockage or staring at a collapse that needs a different job entirely. Drain work must comply with Building Regulations Part H and BS EN 752.

Summary

Drain unblocking is one of the most profitable jobs a drainage firm does and one where customers feel most exposed to being ripped off — so transparent, tiered pricing is the whole game. The first rod or jet clears most blockages in under an hour; the real money and the repeat business come from diagnosing why it blocked (roots, fat, wet wipes, a displaced joint, a collapse) with a CCTV survey, then quoting the repair. Price the clearance honestly and the survey is the natural, fair upsell.

The people searching this are drainage engineers, plumbers who clear drains as a sideline, and property maintenance firms validating their call-out and jetting rates against the market. The biggest pricing mistakes are: quoting a flat call-out then finding a collapse that needs excavation; not checking whether the defect is on a lateral drain or shared sewer the water company should fix for free; bundling clearance, survey and repair into one vague figure; and underpricing out-of-hours work. The single most common customer complaint is thinking the call-out fee was the whole price — so the fix is tiered written pricing before you attend.

This guide covers rodding, high-pressure jetting, CCTV surveys and the responsibility question, plus emergency call-out pricing. It covers realistic time on site, current 2026 plant and consumable costs, regional day rates, the labour/margin split (materials are tiny on a clearance — this is a labour-and-plant job), typical net margin, the red flags that turn a clearance into a repair lead, and what to itemise. The 2011 private sewer transfer applies in England and Wales — confirm the local position before telling a customer who pays.

Key Facts

• Drain rods (manual set) — £30-£80 kit; effectively a consumable
• High-pressure water jetter (van-pack) — £100-£250/day hire, or owned plant
• Jetter nozzles (flushing, penetrating, root-cutting) — £20-£120 each
• CCTV push-rod camera — owned plant; the survey is priced as a service, not a material
• Drain unblocker chemical (caustic, trade) — £10-£25 (limited use; jetting preferred)
• Consumables per clearance (gloves, sanitiser, sundries) — £5-£20
• Drainage engineer day rate — £180-£320 regional, £260-£420 London
• Standard call-out (working hours) — £80-£180
• Out-of-hours / emergency call-out — £150-£350+
• Simple rod clearance — £80-£180 typical, 0.5-1 hr on site
• High-pressure jetting — £150-£400 typical, 1-2 hr on site
• CCTV survey with written report — £180-£500 typical, 1-2 hr on site
• Clear + survey combined call-out — £250-£600 typical
• Drain descaling / heavy root-cutting — £250-£600 depending on length
• Net margin on clearance work — 50-70%+ (very low material cost; it's labour, plant and skill)
• VAT — 20% standard rate

Quick Reference Table

Detailed Guidance

Establish responsibility before you quote a repair

Before quoting any repair — not the clearance, the repair — work out whose pipe it is. Under the Water Industry Act 1991 and the 2011 private sewer transfer (England and Wales), most lateral drains (the run beyond your customer's boundary) and shared/private sewers became the local water company's responsibility, and they will often clear or repair these free of charge. So:

• Blockage or collapse within the customer's boundary — the customer's job (yours)
• Defect on a lateral drain beyond the boundary, or a shared sewer — usually the water company's responsibility, often cleared free

You still charge for the clearance and the diagnostic survey regardless — but be straight about who pays for a repair. Telling a customer their £4,000 collapse is actually the water company's problem builds the trust that wins referrals. A CCTV survey with a plan locating the defect relative to the boundary is the evidence that settles it.

Rodding — the first-line clearance

Manual drain rods are the cheapest, fastest tool for a straightforward blockage near an accessible chamber — wet wipes, a localised fat plug, a minor root. Push, twist clockwise (so rods don't unscrew and get lost down the drain), clear, flush, confirm flow. It's a flat-fee job: a transparent call-out plus clearance.

Resist dishonestly "finding more work" — but always offer a CCTV survey afterwards if the blockage recurs or the cause is unclear. A recurring blockage is a defect, not a one-off, and the honest survey is where the real value sits.

Pricing example (regional, working-hours rod clearance):

High-pressure water jetting — grease, roots, scale, long runs

When rods won't shift it — congealed fat, fine root mats, scale, or a long run — high-pressure water jetting is the tool. The jetter pushes a hose down the drain with a backward-firing nozzle that propels itself and scours the pipe wall. Different nozzles for flushing, penetrating a hard blockage, or root-cutting.

Jetting prices higher than rodding because of the plant cost (a van-pack jetter is thousands of pounds of kit) and the skill. It's also the natural lead-in to a survey: once the pipe runs clear, put the camera down to see what caused the blockage.

Pricing example (regional, jetting a grease-blocked kitchen run):

CCTV survey — diagnosis and the repair lead

A push-rod CCTV camera surveys the drain and produces a recording and a report giving the location, depth and type of any defect (root ingress, displaced joint, fracture, collapse, fat build-up, rat damage). The survey sells for three reasons: to find the cause of a recurring blockage, to scope a repair quote, and for pre-purchase/home-buyer drain checks.

Always provide a written report with a coded condition (WRc/MSCC drain condition coding is the industry reference) and a sketch plan. The survey is what turns a £150 clearance into a £3,000 repair lead — and it's the evidence for whether the defect is the customer's or the water company's.

Pricing example (regional, CCTV survey with report):

Regional day rates and the labour/margin reality

Drainage engineers run £180-£320 a day regional and £260-£420 in London. But clearance work isn't really day-rated to the customer — it's priced as a call-out plus a task fee, because a one-hour clearance can't be sold at a full day. Plan your pricing so a half-day of clearance call-outs covers a day's costs.

Crucially, this is a labour-and-plant job, not a materials job. Consumables on a clearance are £5-£60; everything else is your time, your van, your jetter and your skill. That's why net margins on clearance and jetting are high (50-70%+) — but only if you price the call-out and the task properly and don't undercut yourself competing on the phone. The plant (jetter, CCTV kit, recovery) is the real cost to recover, spread across jobs.

Emergency and out-of-hours pricing

Drain emergencies — sewage backing up into a property — are urgent and command an out-of-hours premium. Price out-of-hours call-outs at £150-£350+ and be explicit on the phone about the call-out fee, what it covers, and that jetting or excavation is extra. Quote tiered, in writing where you can, before attending. The most common complaint in this trade is a customer who thought the call-out fee was the whole price — kill that complaint before you set off.

Common pricing mistakes

• Not checking responsibility — many lateral-drain/shared-sewer defects are the water company's free repair, not the customer's bill
• Flat-fee quoting a collapse — a collapse is excavation/relining, a different job from a clearance; never bundle them blind
• Bundling clearance, survey and repair into one vague figure — itemise: clearance fee, survey fee, repair quote
• Underpricing out-of-hours — emergency call-outs justify a premium; state it before attending
• No written survey report — the report is the evidence for the repair quote and the responsibility question
• Over-relying on chemicals — caustic unblockers are limited and risky; jetting is the professional clearance
• Competing on phone price — racing to the cheapest call-out trains customers to expect the call-out is the whole job

Frequently Asked Questions

How much should I charge for a simple drain unblock?

A straightforward rod clearance in working hours is typically £80-£180 regional, £120-£250 in London — built from a call-out fee plus an hour or so of labour and minimal consumables. Don't sell it below your costs to win the phone call: the margin on clearance work is good only if the call-out and task fee actually cover your van, plant and time. Price it tiered (rod / jet / survey) so the customer understands a simple clear is cheap and a jetting or survey is more.

Is jetting worth charging more than rodding?

Yes. Rodding is faster and cheaper for a simple, accessible blockage near a chamber. But for congealed fat, root mats, scale or a long run, high-pressure jetting scours the whole pipe wall instead of punching a hole through the blockage — it's more effective, needs expensive plant and more skill, and properly clears the line. Price it as a separate, higher tier (£150-£400) so the customer sees why it costs more, and many jobs legitimately start with rods and escalate to the jetter.

When should I push a CCTV survey, and what should I charge?

Push it whenever a blockage recurs, before a property purchase, or to scope a repair — never as a dishonest add-on to a one-off clear. Charge £180-£500 including a written report with condition coding and a sketch plan. It's the highest-value part of a clearance call-out because it locates and codes the defect, evidences whether the water company is responsible, and turns a one-off clearance into a costed repair lead worth ten times the call-out.

Who pays if the drain that's blocked is a shared one?

Often the water company. Since the 2011 private sewer transfer under the Water Industry Act 1991 (England and Wales), most lateral drains beyond the boundary and shared sewers became the water company's responsibility and are frequently cleared free. The customer is responsible for drains within their own boundary. Establish the boundary and the defect's location — a CCTV survey with a plan does this — before telling the customer who pays for a repair. You still charge for your clearance and survey regardless.

What net margin should I expect on clearance work?

High — typically 50-70%+ — because the material cost is tiny (consumables of £5-£60) and the price is almost all labour, plant and skill. The catch is that the plant (jetter, CCTV camera, recovery kit) is a large fixed cost you only recover by pricing call-outs and tasks properly and keeping the van busy. Underprice the call-out to win work and the headline margin evaporates once you account for the kit and the dead time between jobs.

Regulations & Standards

• Water Industry Act 1991 — the framework for drainage responsibility; basis of the 2011 private sewer transfer (England and Wales)

• Building Regulations 2010 — Approved Document H1 (Foul water drainage) — drain design, connections, access and build-over

• BS EN 752:2017 — Drain and sewer systems outside buildings; sewerage system management

• BS EN 13508 — Condition of drain and sewer systems outside buildings (survey coding basis)

• WRc Manual of Sewer Condition Classification (MSCC) — industry-standard drain condition coding for CCTV surveys

• Confined Spaces Regulations 1997 — for deep chamber and manhole entry work

• Control of Substances Hazardous to Health (COSHH) Regulations 2002 — handling caustic chemicals and managing the foul/biohazard risk of sewage

• Ofwat — who is responsible for drains and sewers — drainage responsibility after the 2011 transfer

• Approved Document H — Drainage and waste disposal — Part H1 foul drainage

• HSE — Confined Spaces Regulations — manhole and chamber entry safety

• HSE — COSHH — chemical and biohazard control for drainage work

• BSI — British Standards Institution — BS EN 752, BS EN 13508

• blocked drains — causes of blockages and how to clear them

• drain cctv survey — running and reporting a CCTV survey

• root intrusion — diagnosing and pricing root-damaged drains

• no dig drain repair — the trenchless repair you quote off the survey