The unblock is the cheap part. The cause is the invoice.
Most blocked drains in Christchurch are a quick jetting or rodding job. The ones that matter are the ones that come back, and in a city where the earthquakes moved the ground under half the pipework, a recurring blockage deserves a camera before it deserves a third callout. Christchurch has a dedicated drainage specialist for exactly that job, plus the big plumbing firms with drainlaying in-house.
Is this your stream?
A toilet that will not clear, a gully trap overflowing outside, a shower that ponds, or several fixtures backing up together. One fixture is probably local; everything at once is the main line.
A slow sink is a standard-hours booking, not a 24/7 callout. And if the whole street is affected or sewage is surfacing on the berm, report it to Christchurch City Council first, because that is the public network and not your invoice.
What it costs in Christchurch
The unblock itself
NZ guides put a standard household drain unblock at $150–$450 depending on access and whether it is rodded or jetted, with Christchurch plumber rates at $100–$140 an hour plus a $60–$90 callout. Simple is cheap; roots and grease take longer.
The CCTV inspection
A camera inspection is quoted on top of the unblock. It is the line item people skip, and the one that pays for itself when the same drain blocks again: you find out whether it is roots, a belly, or a cracked pipe from ground movement.
The repair
If the camera finds damage, the repair is drainlaying: restricted work, separately quoted, and priced by length, depth and surface. A patch repair is hundreds; a full line replacement across a driveway runs into thousands.
Christchurch providers, compared
Six options for blocked drains across Christchurch and Canterbury, grouped by what they are best at. Hover a row for the detail that matters.
Common mistakes
Jetting the same drain every six months: a blockage that keeps coming back has a cause, and in Christchurch's eastern suburbs that cause is often quake-damaged or bellied pipework, not just roots. Pay for the CCTV inspection once instead of the unblock forever.
Assuming every unblocker is a drainlayer: clearing a blockage is one skill; repairing or replacing the pipe is drainlaying, which is restricted work under the PGDB. Ask who would do the repair if the camera finds a crack.
Flushing the problem further down: wet wipes, cooking fat and sanitary products are the classic Christchurch blockage cocktail. If the whole street is flooding, though, stop calling plumbers and call the Council, because that is the public wastewater network.
Not asking what happens if the jet does not work: a proper drain outfit will tell you the plan before starting: rod or jet first, camera if it fails or recurs, quote before any digging. Get that sequence in writing.
Paying emergency rates for a slow drain: one slowly draining sink is a standard-hours job. The 24/7 premium is for sewage on the floor or a toilet you cannot use, and Flow Pro's data puts that premium at $150–$300 or more.
Ignoring the stormwater side: Christchurch's flat terrain means stormwater has nowhere to hide, and a blocked stormwater line floods fast in a nor'west rain. Total Drain Cleaning and Walton both handle stormwater; ask for both lines to be checked if the yard ponds.
FAQ
How much does drain unblocking cost in Christchurch?
NZ guides put a standard drain unblock around $150–$450 depending on access and method, with Christchurch plumber hourly rates at $100–$140 plus a $60–$90 callout (Flow Pro 2025 data). CCTV camera inspections are typically quoted on top, and any repair work after the camera finds damage is a separate drainlaying quote.
When do I need a CCTV drain inspection?
When the same drain blocks twice, when multiple fixtures back up at once, before you buy an older Christchurch home, or after any ground movement near the line. In eastern suburbs hit hard by the earthquakes, a camera is the cheapest way to know whether you have roots or a cracked pipe.
Is a blocked drain ever the Council's problem?
Yes. Christchurch City Council owns the public wastewater and stormwater networks. If sewage is surfacing on the street or several properties are affected, report it to the Council first. Everything on your side of the boundary is yours to fix.
Can I unblock a drain myself?
A plunger and a drain snake from the hardware store will clear simple trap blockages. What you cannot DIY is anything past the gully trap, and chemical drain cleaners often just move the blockage further down while damaging older earthenware pipes. Recurring blockages need a camera, not more chemicals.
Who repairs the pipe if the camera finds damage?
Repairing or replacing drains is drainlaying, which is restricted work under the Plumbers, Gasfitters and Drainlayers Board. Firms like Foleys, Clyne & Bennie and Laser Plumbing Christchurch East have drainlaying in-house; a specialist unblocker like Total Drain Cleaning will diagnose and refer. Ask before booking who carries the repair if one is needed.
A simple unblock runs $150–$450 in guide figures. Total Drain Cleaning is the drains-only specialist with the camera gear; Walton runs a 24/7 drain line with CCTV and water blasting; Foleys, Clyne & Bennie and Laser Christchurch East can carry a found problem through to drainlaying; Plumbquick covers the evenings. If the same drain blocks twice, stop paying for unblocks and pay for the camera.