Blocked Drains in Christchurch: Jetting, CCTV & Repairs

A blocked drain never picks a good moment. We've had calls from Christchurch homeowners where the first warning was a gurgling toilet on a Saturday morning, and others where a slow-draining gully got ignored for months until wastewater backed up over the patio. Either way, the fix is usually quicker and cheaper than people expect, provided it's dealt with before the pipe damages itself.

Complete Builds covers drainage right across Christchurch, from the Victorian terraces off Barrack Road to bungalows out at Mudeford and Highcliffe. Here's what causes most of the blockages we see locally, what clearing them costs in 2026, and when it's worth putting a camera down the line before spending anything else.

Why Christchurch drains struggle

Christchurch sits low between the Stour and the Avon, and much of the town isn't far above the water table. That matters because older clay drain runs, standard on anything built before the 1960s, rely on a decent fall to keep themselves clean. Where ground has settled or a joint has dropped, silt collects instead of washing through, and the pipe slowly chokes.

Tree roots are the other repeat offender. The mature gardens around Fairmile and Purewell look lovely, but willow and poplar roots will find a hairline crack in clay pipework and grow straight into it. We've pulled root masses the size of a fist out of 100mm drains. Add everyday kitchen fat and the wet wipes that claim to be flushable (they aren't), and you get a drain that blocks every few months until someone fixes the actual cause rather than the symptom.

There's a seasonal angle too. It's late July as we write this, and summer is when garden gullies get abused: barbecue fat, paddling-pool water full of grass clippings, compost washed off the patio. It all ends up in the same narrow pipe. A gully guard costs a few pounds and saves a call-out.

Jetting beats rodding, most of the time

Rods are fine for a soft blockage close to an access point. For anything else we use high-pressure water jetting, which scours the full bore of the pipe rather than punching a hole through the middle of the muck. That's the difference between a drain that stays clear and one that's blocked again in six weeks.

For 2026, a straightforward domestic unblock in Christchurch typically costs £120 to £220 with us, depending on access and how established the blockage is. A proper jetting job on a longer run, say a shared drain serving a terrace, usually lands between £180 and £360. Most visits are finished inside an hour or two, and we'll tell you on the phone if yours sounds like something bigger.

What a CCTV survey tells you

If a drain keeps blocking, paying to jet it again is paying for the same symptom twice. A CCTV survey runs a camera down the line and shows exactly what's happening: a displaced joint, root ingress, a belly holding standing water, or on older Christchurch properties, an interceptor trap nobody knew was there. You get footage and a written report, which is also the evidence you need if the defect turns out to sit on a shared or public section.

• Basic camera inspection while we're on site: £120 to £180

• Full CCTV survey with recorded footage and a written condition report: £180 to £420, depending on the size of the property and the length of the runs

• Pre-purchase drain survey for homebuyers: £240 to £480

Buying in Christchurch? On anything pre-war we'd call a pre-purchase survey essential rather than optional. Drain defects found after completion are your bill, not the seller's, and replacing a collapsed run costs a great deal more than surveying it would have.

When it's more than a blockage

Sometimes the camera shows a pipe that's past saving: collapsed, packed with root, or laid with a backfall. Repair costs swing widely with depth, ground conditions and what's sitting above the pipe (lawn is cheap to open up, a block-paved driveway isn't), so we won't throw a number out until we've seen the footage. We always survey before quoting, and the price we agree is the price you pay. Because our drainage and civil works team works alongside our builders and landscapers, the same firm that excavates the repair reinstates your driveway or patio properly afterwards, which is where drainage-only outfits tend to leave you hanging.

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Sort it before it sorts you

A drain that clears slowly in July is a drain that floods in December, once winter rain lifts the groundwater and the system has no slack left. If yours is gurgling, smelling, or backing up, book a visit online and we'll get a local crew out, usually within a couple of days for non-emergencies. One visit, cleared and photographed, and a straight answer on whether anything needs a closer look.