Compare septic tank installation quotes
New build, barn conversion or a failed system? We match you with up to 3 verified local specialists to install or replace your septic tank — correctly sized and to Building Regs.
Free · No obligation · Under 2 minutes
Installing or replacing a septic tank is a significant job, and the specification must be right: sized to the property, sited to the required distances, and with a drainage field designed from a percolation test. Get it right first time and you avoid compliance problems and costly reworks.
It must meet Building Regs
New and replacement septic tanks must meet Building Regulations Part H sizing and siting rules and the discharge rules — a specialist confirms viability with a percolation test first.
Typical cost
Installed; a treatment plant where a soakaway is not viable costs more
- Fixed quotes before anyone visits
- Qualifications & insurance checked
- Matched to up to 3 vetted specialists — not the whole market
Matched to a shortlist — not blasted to the market
We match you with up to 3 verified local specialists — never more — and send their quotes by email, so you compare a shortlist instead of fielding calls from a dozen firms.
What's involved
Septic Tank Installation
A percolation test and site survey confirm whether a septic tank with a drainage field is viable, or whether a treatment plant is the compliant route.
Sized to the number of bedrooms and sited to the required distances from buildings, boundaries and watercourses under Building Regs.
Excavation, tank installation, drainage field and commissioning, with the paperwork you need for Building Control and any future sale.
FAQs
Septic Tank Installation questions
How much does a new septic tank cost?
A new septic tank typically costs between £4,000 and £10,000 installed, depending on size, ground conditions and drainage field works. A treatment plant, where a soakaway is not viable, usually costs more.
Do I need a percolation test?
Almost always. Building Regulations require the drainage field to be sized from a percolation test, and Building Control will normally expect to see the result before approving the installation.
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