Planning Permission Ireland

Contract Law Basics for Self-Builders in Ireland — RIAI Contract, Retention, and Your Rights

Last updated 30/6/2026 · Reviewed 30/6/2026
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The RIAI contract defines your rights and the contractor's obligations. Always use it. Get a solicitor to review before signing.

The RIAI contract defines your rights and the contractor's obligations. Always use it. Get a solicitor to review before signing. Key clauses: scope of works (what's included and what's excluded), programme (start date, key milestones, completion date), payment (stage payments, retention, final payment), retention (5% held until snag closure), defects liability (12 months during which the contractor must fix defects), dispute resolution (mediation, arbitration, court). The RIAI contract is balanced — both parties have rights and obligations. Don't use a contractor's own contract without legal review. Most contractor-drafted contracts are weighted in the contractor's favour (longer payment terms, weaker retention, fewer defects). Pay for the legal review; it's the cheapest €500–€1,000 you can spend on the build.

TL;DR

  • The RIAI contract defines your rights and the contractor's obligations. Always use it. Get a solicitor to review before signing.

  • Key clauses: scope of works, programme, payment, retention (5%), defects liability (12 months), dispute resolution.

  • The RIAI contract is balanced — both parties have rights and obligations. Don't use a contractor's own contract without legal review.

When this matters most

You're at the contract stage and need to understand your rights.

When this doesn't apply

The contract is signed.

Frequently asked questions

Should I use the RIAI contract?

Yes. Always. The RIAI Standard Form of Building Contract 2012 is balanced and covers all the key clauses. Don't use a contractor's own contract without legal review.

What is the defects liability period?

12 months from practical completion, during which the contractor must fix defects that appear. Most RIAI contracts have this. The retention is held during the first 6 months.

How do I resolve a dispute with my contractor?

RIAI contract has a dispute resolution clause: mediation first, then arbitration, then court. Most disputes are resolved at mediation. Document everything in writing from day one.

Sources

RIAI, Form of Building Contract 2012. https://www.riai.ie/

Frequently asked questions

Should I use the RIAI contract?

Yes. Always. The RIAI Standard Form of Building Contract 2012 is balanced and covers all the key clauses. Don't use a contractor's own contract without legal review.

What is the defects liability period?

12 months from practical completion, during which the contractor must fix defects that appear. Most RIAI contracts have this. The retention is held during the first 6 months.

How do I resolve a dispute with my contractor?

RIAI contract has a dispute resolution clause: mediation first, then arbitration, then court. Most disputes are resolved at mediation. Document everything in writing from day one.

When this matters most

You're at the contract stage and need to understand your rights.

When this doesn't apply

The contract is signed.

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