Request a callback

Septic tank installation in Cork

New septic tank or treatment system installation in Cork, from €8,000. We'll confirm the right system for your site and arrange a fully insured installer.

Request a callback

Request a callback to discuss your enquiry. No booking or payment required. Privacy policy.

Business hours: Monday to Friday: 9am to 6pm. Saturday: 9am to 1pm. We may return calls outside these hours, up to 9pm.

New system installationfrom €8,000Depends on the system type, site conditions and ground works needed.

What installation covers

A full installation replaces or adds a septic tank or wastewater treatment system: the tank or unit itself, the percolation or polishing filter area it drains to, and the pipework connecting it to your house. It is usually triggered by a failed inspection, a new build, or a system that has reached the end of its working life.

How the process works

  1. Site assessment and percolation test, if one has not already been done — see our percolation test and site assessment page
  2. System recommendation based on your site, soil and household size
  3. A written quote covering the tank or unit, drainage area works and connection
  4. Installation, then sign-off and any paperwork needed for your records

What to check before you choose an installer

  • Confirm they carry public liability insurance and can show evidence of it
  • Ask whether the quote includes the drainage/percolation area, not just the tank
  • Check whether a grant applies to your situation — grant-funded work generally needs a failed-inspection letter and approval before work starts, not after
  • Ask what happens if the site assessment finds ground conditions that change the recommended system
Planning an installation?Tell us about your site and we will call you back.
Get a callback

Common questions

How long does an installation take?

It depends on the system and ground works required. Straightforward replacements are usually quicker than a new percolation area on a difficult site. We will give you a realistic timeline once we have seen the site assessment.

Do I need planning permission?

Often not for a like-for-like replacement, but it depends on your site and system. Check with Cork County Council if you are unsure, especially for a new build or a different system type.

Can I get the grant for a new installation?

The grant applies after a failed inspection, covering 85% up to €12,000, and needs approval before work starts. See our grant page for the full route.

What is the difference between installation and replacement?

They usually mean the same thing in practice — replacing or installing a system where one did not work before. See our replacement cost page for a cost breakdown.

Official guidance: EPA — wastewater treatment systems. Give us a call to discuss your site.

Serving Cork enquiries