Start Here — A Self-Build in Ireland Runs 18–36 Months and €350k–€800k, So Plan Around the Three Decisions That Actually Matter
On this page
When this matters most
You're still choosing a site, you're still choosing an architect, or you haven't decided whether to build at all (vs buying a resale).
When this doesn't apply
You've already bought a site, appointed an architect, and signed a building contract. You're in stages 5–18 of this site, not Start Here.
Frequently asked questions
How long does a self build take in Ireland from start to keys?
18–36 months from soil test to handover is typical. Planning adds 3–6 months on top. The build itself runs 9–15 months for a 150–200 m² house. Get the team and route locked in by month 6 or you'll run into 2027.
How much does a self build cost per m² in Ireland in 2026?
€2,500–€3,800/m² of finished floor area (SCSI TPI, Q1 2026). Add 15–25% for site-specific cost and a 10% contingency beyond that. A 180 m² house on a flat, serviced site is €450k–€684k before VAT.
Do I need planning permission for a self build in Ireland?
Yes, in nearly every case. Building a new one-off house requires planning permission, building regulations approval (Commencement Notice + BCAR), and an assigned certifier. Sub-€5,000 agricultural or maintenance works are exempt; building a house is not.
Can I get a mortgage for a self build in Ireland?
Yes. Self-build mortgages pay in stage drawdowns tied to build milestones. Help-to-Build gives €30,000 toward the deposit (10% of cost, up to €300k, since April 2025 scheme).
What is BCAR?
Building Control (Amendment) Regulation, in force since 2014. You must lodge a Commencement Notice and appoint an Assigned Certifier and Design Certifier before any work begins. Without BCAR sign-off you can't get a mortgage drawdown or connection to electricity or water.
Should I use a main contractor or direct labour?
Depends on your time, experience and tolerance for risk. Main contractor: ~12–18% on top of build cost, but less of your time. Direct labour: cheaper but 20+ hours/week project-managing for 9–15 months. Hybrid is most common.
Sources
CSO, Planning Permissions Q4 and Year 2025: 5,095 one-off houses granted in 2025, +3.9% YoY. https://www.cso.ie/en/releasesandpublications/ep/p-pp/planningpermissionsquarter4andyear2025/
SCSI (Society of Chartered Surveyors Ireland), Tender Price Index Q1 2026. https://www.scsi.ie/
Citizens Information, Planning permission for a house. https://www.citizensinformation.ie/en/housing/planning-permission/planning-permission/
Building Control (Amendment) Regulations 2014 (SI 9/2014), Department of Housing, Local Government and Heritage. https://www.gov.ie/
Frequently asked questions
How long does a self build take in Ireland from start to keys?
18–36 months from soil test to handover is typical. Planning adds 3–6 months on top. The build itself runs 9–15 months for a 150–200 m² house. Get the team and route locked in by month 6 or you'll run into 2027.
How much does a self build cost per m² in Ireland in 2026?
€2,500–€3,800/m² of finished floor area (SCSI TPI, Q1 2026). Add 15–25% for site-specific cost and a 10% contingency beyond that. A 180 m² house on a flat, serviced site is €450k–€684k before VAT.
Do I need planning permission for a self build in Ireland?
Yes, in nearly every case. Building a new one-off house requires planning permission, building regulations approval (Commencement Notice + BCAR), and an assigned certifier. Sub-€5,000 agricultural or maintenance works are exempt; building a house is not.
Can I get a mortgage for a self build in Ireland?
Yes. Self-build mortgages pay in stage drawdowns tied to build milestones. Help-to-Build gives €30,000 toward the deposit (10% of cost, up to €300k, since April 2025 scheme).
What is BCAR?
Building Control (Amendment) Regulation, in force since 2014. You must lodge a Commencement Notice and appoint an Assigned Certifier and Design Certifier before any work begins. Without BCAR sign-off you can't get a mortgage drawdown or connection to electricity or water.
Should I use a main contractor or direct labour?
Depends on your time, experience and tolerance for risk. Main contractor: ~12–18% on top of build cost, but less of your time. Direct labour: cheaper but 20+ hours/week project-managing for 9–15 months. Hybrid is most common.
Related guides
- Budgeting a Self-Build in Ireland 2026 — The 5 Numbers Every Self-Builder Must Know
- Commit or Buy a House in Ireland — The Honest Trade-Offs of Self-Build vs Resale in 2026
- How Long Does a Self-Build Take in Ireland? The 18–36 Month Timeline, Stage by Stage
- Self-Build Budget in Ireland 2026 — What €600k–€1m Actually Buys You
- Self-Build First Steps in Ireland — The Seven Decisions to Make Before You Instruct Anyone
- Self-Build Insurance and Warranty in Ireland — Site Cover, Structural Warranty, and Latent Defects
- Self-Build Mortgages in Ireland — How Stage Drawdowns Work, Who Lends, and What You Need to Show
- Self-Build Team in Ireland 2026 — Who You Need, When to Hire, and the Cost
- Self-Build Timeline in Ireland 2026 — Month-by-Month, What Happens and When
- Self-Build vs Renovating in Ireland — When a Deep Retrofit Beats a Knock-Down Rebuild
- Sole Trader or Limited Company for a Self-Build in Ireland — The Tax and VAT Trade-Off
- When to Appoint an Architect in Ireland — Before Site Purchase, Not After Planning