Septic tank or treatment system for a new house in Ireland
How a septic tank differs from a packaged treatment system, what the 2021 wastewater code requires for a new house, and who registers and maintains it.
Stage 1: Find and check a site
Get up to €30,000 off a serviced council site. Check who qualifies, planning and build deadlines, local conditions and when you must repay the discount.
The Ready to Build scheme can reduce the price of a council-serviced site by up to €30,000. You must build your own home there, meet the planning and building deadlines, and repay some or all of the discount if you sell or stop living there within ten years.
Councils develop or buy sites in towns and villages, provide services and access, and sell them to individual buyers. The discount depends on the servicing cost and is taken off the sale price. Check your council’s advertisement and draft agreement before committing: local conditions can add deadlines and eligibility tests to the national rules.
The scheme is Stream 2 of the Croí Cónaithe (Towns) Fund. The national scheme outline dates from September 2022; the local examples below illustrate additional council conditions.
It is the scheme for people who need a site, where the Vacant Property Refurbishment Grant is for people who already have a building. It sits alongside, not instead of, ordinary site finance and the SEAI grants.
You must apply as an individual or household and build a home that will be your principal private residence. It is not available to companies or developers, and an applicant may only buy one site under the scheme. Councils must check this.
Applications are prioritised on a sliding scale, in this order:
Sites are offered while funding lasts. Under the national rules, councils apply the priority categories when several applicants qualify for the same site, with a lottery where more than one applicant qualifies. Kildare advertises first-come, first-served prioritisation; ask the council how that operates alongside the national framework. Anyone who is not a first-time buyer or Fresh Start applicant must be moving out of a home they are selling or have sold. You also need tax clearance from Revenue.
The discount is a reduction in the purchase price, capped at €30,000. The discount depends on the council’s servicing costs. A site that needed little work gets a smaller discount than one that needed a lot. Ask for the price and discount for the particular plot you want.
The national scheme includes water, mains wastewater, electricity and access among the services. Ask the council to mark exactly what is installed, what connections or charges remain, and what work you must fund within the plot.
A discounted site does not mean a cheap build. Compare the saving with the rest of your budget in the cost to build a house guide, and remember that a serviced site should still have its own site works and connections to the house.
Check these national deadlines against the agreement you sign with your council:
A three month window is short. Choose your designer and work out your design before you pay the deposit, using the planning permission guide to see what an application involves, and the architect or engineer guide for who to ask. The planning permission duration page shows how long permission lasts once granted.
You must live in the house for at least five years from the date you buy the site. If you sell the property or site, or it stops being your principal private residence, within ten years, you repay part of the discount:
| When it happens | Repay |
|---|---|
| Up to 5 years | 100% of the money value of the discount |
| Over 5 years and up to 10 years | 75% of the money value of the discount |
| Over 10 years | Nothing |
The council and the buyer sign an agreement containing the clawback, including a charge on the property that binds you when you sell. Money recovered goes back to the Exchequer. If you need a self-build mortgage, raise the charge with your lender early, since it sits on the property.
The Fund is intended for towns and villages with a population over 400, and some smaller villages with enough services and amenities. The national outline counts more than 500 towns and villages above that threshold, but this does not mean sites are available in all of them. There is no national site list in that outline. Availability depends on whether your council has serviced and advertised a plot.
Check the local conditions as carefully as the price. These two council schemes have different deposit, planning and occupation deadlines; their terms do not apply to every county.
Laois advertised one site at Swan Road, Durrow for €46,500 and one at Ballyroan village for €35,000. Each site has access to the public road and a water and waste water connection provided by the council and included in the price. Applications ran through an online portal from 15 September to 15 October 2026, so that round has closed.
A 10% deposit was due within 5 working days of acceptance, planning had to be applied for within three months of paying it, and the balance was payable once permission was granted and the site became the buyer’s property. Building had to start within 12 months of the grant, or the full value of the discount was repayable.
Kildare is selling 7 serviced sites at Clogherinkoe, with an online portal open from 12pm on 12 August 2026 until 12pm on 31 December 2026. It says applications are prioritised first come, first served, in line with the Rural Housing Policy of its development plan, and it asks applicants to show:
Kildare’s deposit is a minimum of 10%, due within one month of the offer. If planning is refused, the council gives a further 6 months on request. If there is no permission 12 months after the offer, the deposit is returned and the site goes to another applicant.
Kildare also expects the house to be built and occupied within 30 months of approval, or for the buyer to seek written council approval for a longer period. It does not allow temporary or mobile homes during construction. If you have not occupied it by then, you must give the site back to the council. You are refunded its fair market value as set by an independent valuer, which may be less than you paid.
Those extra conditions, especially the proof of funds, the local need test and the 30 month deadline, are not in the national outline. Read your council’s own terms, not just this guide, before you pay a deposit. Apply to your local authority. Its Vacant Homes Officer can answer questions about the scheme.
No. The discount is built into the price of the site. The council sells you the site for less than its market value, by up to €30,000 depending on how much servicing the council paid for. A charge on the property and a clawback agreement protect the State's interest for ten years.
No. The scheme is exclusively for individuals or households whose new home will be their principal private residence. It is not available to undertakings or developers, and you must repay part of the discount if you sell or stop living there within ten years.
Ownership only transfers, and you only pay the balance, once planning permission has been received. If you do not apply within 3 months of approval to purchase and paying the deposit, the site reverts to the local authority.
Only if you are selling it, or have sold it, and want to live in a town or village. First-time buyers and people who qualify under the Fresh Start principle (for example after divorce, separation, insolvency or bankruptcy, with no remaining legal interest in the old home) are placed first. Disabled people and older people moving from a home they are selling or have sold are placed next, ahead of other sellers.
Sites are advertised on the local authority's website or in local publications, with a closing date for applications. Check your county council's website, or ask its housing or vacant homes team.
Last reviewed 19 October 2026. Rules and figures change, so confirm anything important with the source before you rely on it.
This guide is general information about self-building in Ireland, not financial, legal or insurance advice. Get advice that fits your own situation before you make decisions.