Self-Build Budget in Ireland 2026 — What €600k–€1m Actually Buys You
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Build is €450k–€684k on a 180 m² house. Site works, fees, services, VAT and contingency add 30–55% on top.
A self-build in Ireland in 2026 costs €600k–€1m total for a 150–200 m² house. The build itself is €2,500–€3,800/m² of finished floor area (SCSI Tender Price Index Q1 2026), so €450k–€684k for a 180 m² house. On top of that: site works €20k–€80k (slope, access, services, septic, well), professional fees €25k–€60k (architect 8–12% of build, engineer, BER assessor, quantity surveyor, solicitor), connection charges €5k–€15k (ESB, Uisce Éireann, gas if applicable), VAT €30k–€90k (13.5% on labour, 23% on materials for non-VAT-registered self-builders), and contingency €45k–€68k (10% of build). Site-specific cost is the variable most first-time self-builders underestimate. Plan €20k on a flat, serviced site; plan €80k+ on a sloped, remote site. About 80% of self-builders cannot recover VAT in full.
TL;DR
Total self-build project cost in Ireland 2026: €600k–€1m for a 150–200 m² house (SCSI Q1 2026). Build is €2,500–€3,800/m²; everything else is 30–55% on top.
Build €450k–€684k + site works €20k–€80k + professional fees €25k–€60k + connections €5k–€15k + VAT €30k–€90k + contingency €45k–€68k.
Site-specific cost is the variable most first-time self-builders underestimate. On a flat, serviced site, plan €20k. On a sloped, remote site, plan €80k+.
When this matters most
You're shaping the budget envelope and need a realistic number to brief the architect and the bank.
When this doesn't apply
You've already signed a building contract with a fixed price.
Frequently asked questions
How much does a self-build cost in Ireland in 2026?
Total project cost €600k–€1m for a 150–200 m² house. Build is €2,500–€3,800/m²; site works, fees, services, VAT and contingency add 30–55% on top (SCSI Q1 2026).
How much is site works on a self-build?
€20k–€80k depending on the site. Flat, serviced urban site: €20k. Sloped, remote rural site with long connection runs and a treatment system: €80k+.
How much contingency should I plan on a self-build?
10% of build cost is the absolute minimum (€45k–€68k on a 180 m² house). 15% is safer. Covers rotten steel, soil surprises, upgrade costs, VAT miscalculations.
Can I claim back VAT on a self-build in Ireland?
Partially. If you are VAT-registered, you can reclaim most VAT. If not (most self-builders), VAT applies at 13.5% on labour and 23% on materials. About 80% cannot recover VAT in full.
Sources
SCSI (Society of Chartered Surveyors Ireland), Tender Price Index Q1 2026. https://www.scsi.ie/
Revenue Commissioners, VAT on residential property. https://www.revenue.ie/
Frequently asked questions
How much does a self-build cost in Ireland in 2026?
Total project cost €600k–€1m for a 150–200 m² house. Build is €2,500–€3,800/m²; site works, fees, services, VAT and contingency add 30–55% on top (SCSI Q1 2026).
How much is site works on a self-build?
€20k–€80k depending on the site. Flat, serviced urban site: €20k. Sloped, remote rural site with long connection runs and a treatment system: €80k+.
How much contingency should I plan on a self-build?
10% of build cost is the absolute minimum (€45k–€68k on a 180 m² house). 15% is safer. Covers rotten steel, soil surprises, upgrade costs, VAT miscalculations.
Can I claim back VAT on a self-build in Ireland?
Partially. If you are VAT-registered, you can reclaim most VAT. If not (most self-builders), VAT applies at 13.5% on labour and 23% on materials. About 80% cannot recover VAT in full.
When this matters most
You're shaping the budget envelope and need a realistic number to brief the architect and the bank.
When this doesn't apply
You've already signed a building contract with a fixed price.
Where to go next
Next decision
The next step in your build sequence.