Septic tank replacement cost in Cork
Typical prices for a new tank, treatment system or percolation area, and what affects the cost.
Typical full replacement€8,000–€15,000Every site is different. We give a fixed price after a site visit.
What affects the price
- Whether you need a new tank, a treatment system, a new percolation area, or all three
- Ground conditions (some sites need a raised percolation area or a polishing filter)
- Access for machinery
- How far the system is from the house
- Removing or decommissioning the old tank
With the grant
If the replacement follows a failed inspection, the grant covers 85% of approved costs, up to €12,000. On an €11,000 job, the grant would be €9,350 and you would pay about €1,650. See the grant calculator.
Want a fixed price?We visit, check the site and give you a fixed quote.
Common questions
How long does a replacement take?
Most domestic jobs take a few days on site once the design is agreed.
Do I need planning permission?
A like-for-like replacement often doesn't, but some changes do. Check with Cork County Council for your site.
Can I just repair the old tank?
Sometimes. If the tank is sound, a repair or new percolation area may be enough.
Get a callback
Areas we cover
Cork City · Ballincollig · Carrigaline · Midleton · Cobh · Mallow · Fermoy · Mitchelstown · Bandon · Clonakilty · Skibbereen · Bantry · Macroom · Kanturk · Youghal · Kinsale