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Septic Tank Prices Australia
Prices include GST. Installation prices vary significantly with soil conditions, site access, tank size, and council requirements. Always obtain a site-specific quote from a licensed plumber or septic installer.
Septic Tank Prices by Service Type — Australia
Prices include GST. Installation prices vary significantly with soil conditions, site access, tank size, and council requirements. Always obtain a site-specific quote from a licensed plumber or septic installer.
| Service | Unit | From | Average | Up to |
|---|---|---|---|---|
| 🚛Septic Tank Pump-Out Pump-out and disposal of septic tank contents by a licensed liquid waste contractor, including hose connection and basic inspection of tank condition | /service | $250 | $380 | $600 |
| 🏗️Septic Tank Installation (New) Full new septic system installation including tank supply, excavation, drainage field or absorption trench, and council approval for a standard 3-bedroom dwelling | /job | $5,000 | $9,000 | $15,000 |
| 🔄Septic Tank Replacement Replace an existing failed or end-of-life septic tank with a new concrete or polyethylene tank including excavation, connection, and council notification | /job | $4,500 | $8,000 | $13,000 |
| 🔧Septic to Sewer Conversion Decommission existing septic system and connect to mains sewer including plumbing work, tank decommissioning, council inspection, and backfill | /job | $3,000 | $6,500 | $12,000 |
| 📋Septic Inspection & Report Professional inspection of septic system including tank condition assessment, absorption trench check, effluent sampling, and written compliance report for property sale or council | /report | $250 | $450 | $700 |
| 🍽️Grease Trap Pump-Out Pump-out and clean of commercial or residential grease trap including disposal of grease waste, basic condition check, and service record | /service | $180 | $300 | $500 |
| 💧Aerated Treatment System Install Install an aerated wastewater treatment system (AWTS) including unit supply, excavation, electrical connection, irrigation setup, and council approval | /job | $8,000 | $13,000 | $20,000 |
| ⛏️Absorption Trench Repair Repair or replace failed absorption trenches including excavation, installation of new aggregate and perforated pipe, backfill, and surface restoration | /job | $1,500 | $3,200 | $6,000 |
| 🛠️Septic Tank Repair / Patch Repair cracks, broken baffles, damaged lids, or inlet/outlet fittings on existing concrete or poly septic tanks to restore watertight condition | /job | $400 | $900 | $2,000 |
| 🏖️Sand Filter System Install Install a secondary treatment sand filter system for sites with poor soil conditions or high water tables, including media supply, distribution pipes, and council approval | /job | $6,000 | $11,000 | $18,000 |
| 📅Annual Maintenance Contract Annual service contract for aerated treatment systems including required 4-monthly inspections, effluent testing, mechanical servicing, and compliance reporting to council | /year | $200 | $380 | $600 |
| ⚡Effluent Pump Replacement Supply and install a replacement effluent pump for septic systems or AWTS units including pump removal, new pump installation, electrical test, and system commissioning | /job | $600 | $1,100 | $2,000 |
Septic Tank Prices by City
Click a city for detailed local pricing and tips
Sydney
New South Wales · 5.3M
From $290
Newcastle
New South Wales · 320K
Pricing available
Wollongong
New South Wales · 310K
Pricing available
Central Coast
New South Wales · 340K
Pricing available
Melbourne
Victoria · 5.1M
From $220
Geelong
Victoria · 270K
Pricing available
Ballarat
Victoria · 115K
Pricing available
Bendigo
Victoria · 100K
Pricing available
Brisbane
Queensland · 2.6M
From $195
Gold Coast
Queensland · 680K
From $265
Sunshine Coast
Queensland · 350K
Pricing available
Cairns
Queensland · 160K
Pricing available
Townsville
Queensland · 195K
Pricing available
Adelaide
South Australia · 1.4M
From $248
Mount Gambier
South Australia · 30K
Pricing available
Perth
Western Australia · 2.1M
From $255
Mandurah
Western Australia · 100K
Pricing available
Bunbury
Western Australia · 75K
Pricing available
Hobart
Tasmania · 240K
From $265
Launceston
Tasmania · 90K
Pricing available
Canberra
ACT · 460K
From $275
Darwin
Northern Territory · 150K
Pricing available
Alice Springs
Northern Territory · 25K
Pricing available
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Septic tank service prices in Australia range from $180 for basic pump-outs to $20,000 for complex new installations or aerated treatment systems. Prices include GST. Installation prices vary significantly with soil conditions, site access, tank size, and council requirements. Always obtain a site-specific quote from a licensed plumber or septic installer.
The most common septic tank services in Australia include tank pump-outs, new installations, tank replacement, septic to sewer conversion, system inspections and compliance reports, absorption trench repair, aerated treatment system installation, and effluent pump replacement.
Regular pump-outs every 3–5 years prevent costly system failures. Get 2–3 quotes for major work. Organise council approvals before engaging contractors to avoid delays. Schedule non-urgent work for autumn or winter when demand is lower. Prices include GST. Installation prices vary significantly with soil conditions, site access, tank size, and council requirements. Always obtain a site-specific quote from a licensed plumber or septic installer.
In Australia, most septic tank modifications, repairs, and new installations require council or local authority permits. Routine pump-outs typically do not require approval. Requirements vary across Australia by state, province, or region. Prices include GST. Installation prices vary significantly with soil conditions, site access, tank size, and council requirements. Always obtain a site-specific quote from a licensed plumber or septic installer.
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