Septic tank replacement cost in Cork
A full septic tank replacement in Cork typically costs €8,000–€15,000, depending on the ground conditions, system and access. Give us a call and we will arrange an assessment and provide a quotation.
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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.
More about replacing your tank
What will my quotation include?
We will set out the system, drainage works, digging, connections, old-tank removal or closure, and making good the ground afterwards. We will confirm what is included for assessment, design, electrical work, final checks and VAT, and explain any separate costs.
Why do prices vary?
Soil, groundwater, available space and machinery access all affect the work. We assess each property before quoting and discuss anything that could change the price. We serve homes across Cork, including Macroom, Clonakilty and Midleton.
Can you repair part of the system?
Sometimes. If the tank is sound, a repair or replacement drainage area may be enough. We will assess the whole system and explain your options. See our percolation area guide if you have persistent wet ground or drainage problems.
What about running costs?
Allow for emptying and servicing, plus electricity and replacement parts where needed. We will talk you through the maintenance needs of the proposed system and explain the warranty and servicing arrangements.
What happens once I accept the quote?
We agree the work and timing with you, confirm access and explain any temporary limits on using the system. Planning requirements and any grant approval need to be in place before work starts. When the job is finished, we will explain how to use and maintain the system and provide the relevant completion records.
Technical reference: EPA Code of Practice for domestic wastewater treatment systems. Give us a call to arrange a site assessment.
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?
Ask Cork County Council or your planning adviser to confirm the requirements for your proposed works before starting. Do not assume a replacement is exempt.
Can I just repair the old tank?
Sometimes. If the tank is sound, a repair or new percolation area may be enough.