At a Glance
Perth's smaller licensed plumber pool puts drain clearing at $100–$750 per job, roughly 10–15% above east coast rates. Simple internal blockages are at the low end. High-pressure jetting and CCTV investigation for deeper problems cost more.
What's Included in the Price
The job covers attendance, diagnosing the blockage location and cause, clearing it using an electric eel, drain rods, or high-pressure jetter, and a flow test to confirm the drain is clear. All drainage work must comply with AS/NZS 3500 Plumbing and Drainage. CCTV pipe inspection is quoted separately when the cause is not obvious or blockages recur. Pipe repairs, relining, excavation, or replacement are separate quotes. The base callout fee is included. Reinstatement of any disturbed sand, paving, or landscaping is typically not part of the drain clearing quote.
What Affects the Cost
- Clearing method. Rod clearing for straightforward blockages. High-pressure jetting for root masses or hardened grease. CCTV for diagnostic investigation.
- Sandy soil settlement. Perth's sandy soils do not hold pipes as firmly as clay, leading to joint separation and bellied sections that trap debris.
- Tree root intrusion. Eucalyptus, peppermint, and other natives common in Perth suburbs have deep, water-seeking root systems.
- Pipe depth and length. Shallow suburban sewer connections clear faster than deep or long-run connections.
- Access point condition. Sandy soils often cover or shift inspection openings, requiring time to locate and expose them.
- Infill development impact. Subdivided properties may have extended or modified drainage that is harder to trace and access.
A grease blockage in a kitchen drain cleared with an electric eel in a newer Baldivis property sits toward $100. Root intrusion from mature eucalypts in a 1970s Nedlands sewer line, requiring high-pressure jetting and CCTV investigation of bellied pipe sections in sandy soil, pushes toward $750.
Blocked drains can become urgent when sewage backs up into floor wastes or showers. After-hours, weekend, and public holiday callouts carry 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.
Perth-Specific Considerations
Perth's sandy soils create a distinct set of drainage challenges. Unlike clay soils that grip pipes firmly, sand allows pipes to settle, shift, and separate at joints over time. This creates belly points, low spots where water pools and debris accumulates, and separated joints where roots and sand enter the pipe. Suburbs across the northern corridor (Joondalup, Wanneroo, Clarkson) and southern suburbs (Rockingham, Mandurah) built on deep sand are particularly affected.
Eucalyptus, marri, and peppermint trees are widespread across Perth's suburban landscape. Their root systems extend well beyond the canopy and aggressively target sewer pipe joints for moisture. In established suburbs like Nedlands, Claremont, and Kalamunda, large native trees within 10 metres of a sewer line make root intrusion almost inevitable in clay or PVC pipes over 20 years old.
Report main sewer blockages to the Water Corporation on 13 13 75. Main sewer issues are identified by multiple properties being affected or overflow at the Water Corporation manhole. Your private connection from the property to the main is your responsibility to maintain and repair.
Hiring a Licensed Plumber in WA
All drain clearing work in Western Australia must be performed by a plumber licenced through the Plumbers Licensing Board (Building and Energy, DMIRS). Verify licences via the DMIRS online register. For notifiable drainage work (repairs, new connections, relining), plumbers must lodge a Notice of Intention and issue a Certificate of Compliance on completion. Ask for their licence number, confirm public liability insurance, and get a written quote that details the clearing method, whether CCTV is included, and any additional charges for access difficulties.
How We Calculate
Estimates are based on current licenced plumber rates in the Perth metropolitan area, adjusted for WA's typical soil conditions, property age, and drainage infrastructure. All figures include GST. Prices cover standard residential drain clearing. Commercial or Water Corporation main blockages fall outside these ranges.