What Affects the Cost
Clearing method. Electric eel or rods for simple blockages ($100–$300). High-pressure jetting for roots or grease ($300–$600). CCTV adds a diagnostic layer ($250–$550).
Pipe material and age. Pre-1975 clay (earthenware) pipes have cement mortar or rubber ring joints every 600mm that deteriorate over 50+ years, creating entry points for roots. PVC pipes (standard from the mid-1980s) have fewer and tighter joints.
Tree root severity. Light root infiltration at a single joint clears quickly. Dense root masses filling 2–3 metres of pipe require extended jetting time at higher PSI.
Blockage location. An internal trap blockage is quick. A blockage 20–25 metres down the sewer line in the front yard takes longer equipment setup and more time.
Access point condition. Clear, accessible inspection openings speed the job. Buried or damaged access points need to be exposed first, adding 30–60 minutes.
Combined drains. Some older Melbourne properties have combined sewerage drains where multiple properties share a single connection. Responsibility and costs are shared between affected property owners.
A hair blockage in a shower drain cleared with an electric eel in a 2005 Craigieburn home sits toward $100. Recurring root intrusion in a 25-metre clay sewer line under mature elms in Hawthorn, requiring high-pressure jetting and CCTV investigation, pushes toward $800.
Blocked drains can escalate quickly when sewage backs up into floor wastes or showers. After-hours, weekend, and public holiday callouts carry significant premium rates. If only one drain is slow and there is no sewage overflow, scheduling during business hours saves money. If sewage is backing up or multiple fixtures are affected, call immediately.
Melbourne-Specific Considerations
Inner suburbs and root intrusion. Melbourne's inner and middle suburbs are lined with mature English elms, London plane trees, liquid ambers, and flame trees. These deciduous species have extensive root systems that aggressively target sewer pipe joints for moisture. Suburbs like Kew, Hawthorn, Canterbury, and Camberwell in the east, and Brunswick, Northcote, and Fitzroy in the north, have particularly high rates of root intrusion. The combination of large council street trees planted 60–100+ years ago and pre-1975 clay pipe drainage makes root blockages near-inevitable. If your property was built before 1975 and you are experiencing recurring blockages every 6–12 months, a CCTV inspection will typically reveal multiple joint infiltrations along the sewer run.
Clay pipe transition. Clay (earthenware) pipes were the standard drainage material in Melbourne until the mid-1970s. PVC began replacing clay in new construction during the late 1970s, with the transition largely complete by the mid-1980s. If your property predates 1980, expect clay pipes. These pipes use cement mortar joints that crack and separate over decades. Once roots find a joint, they grow inside the pipe and create a self-reinforcing cycle: the roots catch debris, the debris creates a blockage, and the backed-up moisture feeds the roots further. Pipe relining (inserting a resin-coated liner to create a joint-free internal surface, $200–$350 per metre after setup) is the most common long-term fix. It avoids excavating driveways, gardens, and established landscaping.
Three water retailers. Melbourne is split across three water retailers, each responsible for their section of the main sewer network. Report main sewer blockages to Yarra Valley Water on 13 27 62 (north and east), South East Water on 132 812 (south-east), or Greater Western Water on 13 44 99 (CBD, inner, and western suburbs). Yarra Valley Water is responsible for the sewer branch up to the property connection point or a maximum of one metre from the sewer main, whichever is shorter. Your private sewer connection beyond that point is your responsibility. If multiple properties are affected or overflow occurs at the water retailer's manhole, it is a main sewer issue and will be cleared at no cost.
Growth corridor estates. Properties in newer developments like Craigieburn, Tarneit, Wyndham Vale, and Clyde North have modern PVC drainage with minimal tree cover. These jobs are typically straightforward and sit at the lower end of the price range. The most common blockage cause in new estates is construction debris or settlement-related joint movement in the first few years.
Hiring a Licensed Plumber in VIC
All drain clearing work in Victoria must be performed by a plumber registered with the Victorian Building Authority (VBA). Plumbers must issue a Compliance Certificate for notifiable plumbing work, which includes new or altered drainage connections. Standard drain clearing (unblocking without modifying the drainage system) does not require a Compliance Certificate, but any repairs or relining work does.
Worth checking:
Current VBA plumbing registration number (verify online through the VBA practitioner search)
Public liability insurance
Written quote specifying clearing method, whether CCTV is included or additional, and any charges for access difficulties
A good plumber will recommend CCTV for recurring blockages rather than simply clearing and leaving
How We Calculate
Estimates are based on current licenced plumber rates in the Melbourne metropolitan area, adjusted for typical property age and drainage infrastructure in VIC. All figures include GST. Prices cover standard residential drain clearing. Commercial, body corporate, or main sewer blockages fall outside these ranges.