Originally published 31 October 2024. Updated 27 July 2026 to reflect the new 30m² planning exemption.
Key Takeaways
- Garden sheds up to 30 square metres are typically exempt from planning permission
- Total combined size of all outdoor structures must not exceed 30 square metres
- Property must maintain 25 square metres of open space
- Regulations may vary by location and circumstances – please check with local planning office
Understanding Irish Garden Shed Regulations
Are you considering adding a garden shed or garage to your Irish property? Understanding the planning permission requirements is essential before you begin your project. This comprehensive guide explains exactly what size garden shed you can build without planning permission in Ireland, based on current regulations from the Department of Housing, Local Government and Heritage¹.
The 30 Square Metre Rule Explained
According to the Planning and Development Regulations², in Ireland, you can construct a garden shed or garage without planning permission, provided it meets specific size requirements. The primary regulation states that structures must not exceed 30 square metres in total floor area.
However, there are several important considerations:
Combined Structure Limitations
- The 30m² allowance is the combined floor area of all existing and proposed sheds, garages and similar structures covered by the exemption.
Property Space Requirements
- Your property must maintain at least 25 square metres of open space
- This applies to both rear and side areas of your house
- The rule ensures adequate outdoor living space remains
Additional Planning Considerations
Location Restrictions
Whilst the 30 square metre rule applies nationally, local authorities may have additional requirements. The Local Government Planning and Development Act³ emphasises checking with your local planning office before beginning construction.
Property Type Considerations
Different rules may apply for:
- Listed buildings
- Properties in conservation areas
- Homes in designated areas of outstanding natural beauty
Professional Recommendations
Before starting your garden shed project:
- Measure your existing outdoor structures
- Calculate remaining allowance within the 25 square metre limit
- Consider consulting a planning professional
- Document your measurements and plans
- Check local authority guidelines
Latest Guidelines and Resources
Planning regulations can change, so it’s essential to verify current requirements. For the most up-to-date information:
- Visit the official Citizens Information page on Planning Permission: https://www.citizensinformation.ie/en/housing/planning-permission/
- Contact your local planning authority through the Local Authority Directory⁴
- Seek advice from qualified building professionals
Conclusion
Whilst garden sheds up to 30 square metres are generally exempt from planning permission in Ireland, always ensure you comply with all current regulations and local requirements. Taking time to understand these rules can save considerable effort and expense later.
From 27 July 2026, the exempted-development allowance for qualifying garden sheds, detached garages and similar structures in Ireland increased from 25m² to 30m².
Official sources: S.I. No. 340/2026 and Dublin City Council’s summary.
Disclaimer: This information is provided as a general guide. Regulations may vary by location and circumstances. Always verify current requirements with your local planning authority.
References:
¹ Department of Housing, Local Government and Heritage (2024). Planning Guidelines. Available at: www.gov.ie/housing
² Government of Ireland (2024). Planning and Development Regulations. Available at: www.irishstatutebook.ie
³ Local Government Planning and Development Act (Current Version). Available through: www.irishstatutebook.ie
⁴ Local Authority Directory. Available at: www.lgma.ie
