Chapter 9 of 10 · Self-build, extending and renovating · 5 of 8
How to self-build a house in Ireland, step by step
Checked 21 Oct 2026the Central Bank's mortgage measures, Revenue's rules and the scheme operators' published terms.
Self-building in Ireland: site, planning, design, tendering or direct labour, building control, the engineer, connections and BER.
Check before you hire: a architect should be on the register kept by the RIAI. RIAI: register of architects
Written in plain English for the person buying, selling or switching. This guide covers the Republic of Ireland only.
Self-building means you own the site and you have the house built, instead of buying one a developer built. About one in five new homes in Ireland is a one-off house. It takes longer than buying, it involves more people, and it gives you the house you want. This guide walks through the steps in order, from the site to the BER certificate, and says who does what at each one.
The steps in order
| Step | What happens | Who |
|---|---|---|
| 1 | Find and buy the site, or have one gifted | You, a solicitor |
| 2 | Design the house | An architect or technologist |
| 3 | Apply for planning permission | Your designer |
| 4 | Get the mortgage approved | You, the lender |
| 5 | Tender the build, or plan direct labour | Your designer, a quantity surveyor |
| 6 | Lodge the commencement notice | Your designer |
| 7 | Build, with stage certificates | The builder, your engineer |
| 8 | Connect water, power, wastewater and broadband | You, the utilities |
| 9 | Get the completion certificate and the BER | Your certifier, a BER assessor |
| 10 | Move in and claim Help to Buy's final step | You |
The self-build journey tracks each of these with the tools and guides for it.
Step 1: the site
A site is a piece of land with, or without, planning permission for a house. The price depends on where it is, whether it has permission, and whether services (water, power, a road) are close. Before you buy, you need to know whether the council will let you build there: the zoning, and in rural areas the local-need rules. A solicitor (check the Law Society's register; see the conveyancing solicitor page) handles the purchase. The buying land guide covers the checks, including the percolation test and the stamp duty on land.
Many self-builders get the site from family. That is a gift, and a gift letter and a valuation go to the lender.
Step 2: design
Your designer draws the house. An architect (the RIAI register; see the architect page) designs and can run the whole project. An architectural technologist draws and lodges plans. An engineer or building surveyor (Engineers Ireland or the SCSI; see the structural survey page) designs the structure and the drains, and often certifies the stages for the lender. Many self-builds use one professional for the design and another for the structure.
Fees vary with how much you ask for. Drawings for planning alone cost less; a full service through to completion costs more, often as a percentage of the build. Ask for a written fee proposal that says what is and is not included.
Design to a budget. The cost of a house is set mostly by its size and its finish. Build costs are quoted per square metre, and in 2026 typical quotes run from about €2,000 to €3,000 a square metre for a standard finish, before the site, fees and connections. That is a planning range, not a quote; a quantity surveyor (the SCSI) costs your actual drawings. A 180 square metre house at €2,200 is €396,000 before anything else.
Step 3: planning permission
Your designer lodges the application with the council: drawings, a site notice, a newspaper notice, and the fee. The council has eight weeks to decide, unless it asks for further information, which restarts the clock. Anyone can object within the first five weeks. A decision can be appealed to An Coimisiún Pleanála, the national planning body. Permission usually lasts five years. The planning permission guide covers the process, the fees and the local-need rules for rural sites.
Permission comes with conditions. Read them. A condition can require a development contribution to the council, a particular wastewater system, a certain roof colour, or a bond.
Step 4: the mortgage
Lenders want full planning permission, drawings, a costed build and a supervising professional before they agree a self-build loan. The loan is paid in stages against your engineer's certificates, and you pay interest only on what is drawn until the house is finished. Help to Buy, for first-time buyers, is paid into the loan account at the first drawdown. The self-build mortgage guide explains the deposit, the stages and the certificates, and the self-build mortgage calculator runs the numbers.
Step 5: tender or direct labour
There are two ways to build.
A main contractor builds the whole house for a fixed price under a building contract. Your designer sends the drawings to three or four builders (this is called tendering), the builders price the job, and you pick one. You pay in stages that match the lender's stages. It costs more than direct labour but it is one contract, one person responsible, and one price.
Direct labour means you hire each trade yourself: groundworks, blocklayer, roofer, plumber, electrician, plasterer, carpenter. You buy the materials. It can save money and it takes an enormous amount of your time. The lender wants a costed schedule from a quantity surveyor and a professional supervising. Mistakes in sequencing cost weeks.
Whichever you choose, get a quantity surveyor to cost the drawings before you tender. Then you know whether the tender prices are fair.
Step 6: building control (BCAR)
The Building Control (Amendment) Regulations 2014, known as BCAR, govern how a new house is certified. Before work starts your designer lodges a commencement notice with the council's building control section, at least 14 days before. For a new house the full system requires a design certifier, an assigned certifier who inspects during the build, and a certificate of completion lodged before you occupy.
A person building a single house for their own use can opt out of the certifier parts. The building regulations still apply in full, and the lender still wants a professional's certificate. Many self-builders opt out and have their own engineer inspect and certify instead. Ask your designer which route suits your build and your lender.
Step 7: the build
The build usually takes 9 to 18 months. Your engineer visits at each stage, signs the stage certificate, and the lender releases the money. A typical order:
- Site clearance, foundations and the ground floor slab.
- Walls to roof level.
- Roof, windows and doors, so the house is weathertight.
- First fix: wiring, plumbing and heating pipes in the walls.
- Insulation and plastering.
- Second fix: sockets, switches, radiators, sanitary ware, kitchen, doors.
- Floors, painting, external works, the driveway.
Keep a contingency of about 10% of the build cost for the things nobody saw coming. Keep every invoice; the lender and Revenue may ask for them.
Step 8: connections
Connections take longer than people expect. Apply early.
- Electricity: a connection from ESB Networks, with a meter box on the site boundary.
- Water: a connection from Uisce Éireann, or a group water scheme, or a private well that is tested.
- Wastewater: a public sewer where there is one, or a septic tank or treatment system sized to the percolation test and registered with the council.
- Broadband: fibre in many rural areas now, through the National Broadband Plan.
Step 9: completion and the BER
At the end, your certifier signs the certificate of completion and the certificate of compliance with planning and building regulations. The lender needs both before the final stage. A BER assessor (on SEAI's register; see the BER assessor page) measures the house and issues the BER. A new house built to the current regulations is usually A-rated, which opens green mortgage rates at most lenders. The BER guide explains the scale.
Step 10: moving in
Once the final stage is drawn, the loan switches to full repayments. If you claimed Help to Buy, you must live in the house for five years. Tell Revenue the completion date for the Local Property Tax; the LPT guide explains when liability starts. Keep the drawings, the certificates, the planning permission and the BER together. Whoever buys the house from you one day asks for every one of them.
Where this leaves you
Start with the self-build mortgage calculator to see what the loan, the stages and the interest look like for your size of house. The self-build journey puts the steps and the professionals in order, and you can get quotes for the architect or engineer who designs the house and certifies the build.
Questions people ask
How much does it cost to self-build a house in Ireland?
Build costs are quoted per square metre. Typical quotes in 2026 run from about €2,000 to €3,000 a square metre for a standard finish, before the site, fees and connections, and more in Dublin or for a high finish. Get a quantity surveyor to cost your own drawings.
How long does it take to self-build a house?
Planning takes about eight weeks for a decision once the application is in, longer with further information requests or an appeal. The build itself usually takes 9 to 18 months. From buying the site to moving in, two years is common.
What is BCAR?
The Building Control (Amendment) Regulations 2014. For a new house they require a commencement notice, design and construction certifiers, and a certificate of completion before you can occupy. A one-off house for your own use can opt out of the certifier parts, but the building regulations still apply.
Do I need an architect to self-build?
Not by law, but you need someone to design the house, lodge the planning application, and certify each stage for the lender. That can be an architect, an architectural technologist, an engineer or a building surveyor. Lenders require a professional to sign the stage certificates.
Can I build my own house with direct labour?
Yes. You hire each trade yourself instead of one builder. It can cost less but takes far more of your time, and lenders want a costed schedule from a quantity surveyor and a professional supervising the work. Most first-time self-builders use a main contractor.