Septic System & HSTP Costs in Queensland
Everything You Need to Know About Pricing Your On-Site Wastewater System
Wondering “How much will a septic tank or HSTP cost in Queensland?” You’re not alone. Costs vary based on system type, property size, soil conditions, council fees and more. This guide breaks down all the factors so you can budget smart—and then get your instant, custom quote from Statewide Wastewater.
Key Cost Drivers
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System Type
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Traditional Septic Tanks: S
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HSTPs (Ozzi Kleen, Taylex, Aqua Nova, etc.)
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Tank Size & Capacity
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Single dwelling vs multi-bedroom home vs dual-dwelling/granny flat
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Common sizes: 3,000L – 10,000L+
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Site & Soil Conditions
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Rock, clay or sandy soils require different trenching methods
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Additional testing (percolation, soakage) adds to fees
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Council Fees & Approvals
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Varies by region: Moreton Bay vs Sunshine Coast vs Somerset vs South Burnett vs Brisbane vs Scenic Rim
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Application, inspection and permit charges
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Disposal Method
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Standard absorption trenches vs subsurface drip irrigation vs mound systems
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Eco-friendly irrigation etc.
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Access & Terrain
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Easy frontage access vs steep/bush blocks
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Equipment mobilisation fees
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How to Get Your Exact Cost
How to Get Your Exact Cost
Free On-Site Assessment
We inspect your property, soil and layout—no obligation.
Tailored Design & Report
We prepare council-compliant plans and a detailed report.
Transparent Proposal
You see every line item: system, trenching, approvals, irrigation, etc.
👉 Request Your Custom Quote Now » HERE
Why You Won’t Find “One-Size-Fits-All” Pricing
Every property is unique. Soil, slope, system capacity and council requirements all play a part.
Custom designs matter. We don’t do “cookie-cutter” installs—each quote reflects your site’s needs.
Transparent breakdowns. You’ll see exactly where your investment goes: design, approvals, installation, and ongoing support.