Septic tank grant: up to €12,000
Your council can pay 85% of the cost of fixing or replacing your septic tank, up to €12,000, under the domestic waste water treatment system (DWWTS) grant. You need the council's inspection letter first, and the grant is paid after the work is done.
Checked October 2026. Source: localgov.ie: septic tank grant.
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What it is
The DWWTS grant helps households fix or replace a septic tank or other on-site waste water system. It pays 85% of the cost of the work, up to €12,000.
The grant follows the council's inspection of your system. You need the inspection letter before you apply, and the council pays once the work is finished.
Who qualifies
- You own the home and it has its own septic tank or waste water system
- The council has inspected the system and sent you a letter
- The work fixes the problems the inspection found
How much you can get
| Septic tank (DWWTS) grant | 85% of the cost, up to €12,000 |
|---|
- Ask your council whether the cost they assess includes VAT before you accept a quote.
Official maximums from localgov.ie: septic tank grant, checked October 2026. What you get depends on your home and the work.
How to apply
- Get the council's inspection letter. This sets out what needs fixing.
- Get a quote. From a drainage contractor or groundworker for the work in the letter.
- Apply to your council. Use the council's DWWTS grant form.
- Get the work done. Fix or replace the system.
- Claim the grant. The council pays after the work is complete.
Do you need approval before work starts?
You need the council's inspection letter before you apply. Check with your council before the work starts.
What your contractor must provide
- The council's inspection letter
- An itemised invoice for the work
- Any certificates your council asks for on its grant form
Are you a trade? See the full grant invoice checklist.
Trades who do this work
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Questions about the septic tank grant
How much is the septic tank grant?
85% of the cost of the work, up to €12,000.
Do I need an inspection first?
Yes. You need the council's inspection letter before you apply.
When is the grant paid?
After the work is finished.
Official sources
Checked October 2026. Amounts and rules can change, so check the official source before you apply.
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