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Build a Garden Home or Extension Without Planning Permission in Ireland (2026 Guide)
Discover how Ireland’s new planning exemptions could help you create more living space – and how Tutum Homes can deliver a turnkey solution from design to completion.
Ireland’s New Planning Rules Make Home Extensions Easier Than Ever
The Irish Government has introduced significant changes to the Planning and Development (Exempted Development) Regulations under S.I. No. 340 of 2026, making it easier for homeowners to expand their properties without applying for full planning permission in many cases.
From 27 July 2026, qualifying homeowners can benefit from new exemptions for:
- Detached self-contained garden homes (also known as auxiliary habitable dwellings)
- Larger house extensions
- Certain attic and dormer extensions
- Internal subdivision of existing homes
These changes are designed to help address Ireland’s housing shortage while allowing families to maximise the potential of their existing homes.
What Is an Exempted Development?
An Exempted Development allows certain building works to be carried out without applying for planning permission, provided the project meets all conditions set out in the regulations.
While planning permission may not be required, homeowners must still comply with:
- Building Regulations
- Fire Safety requirements
- Structural standards
- Wastewater and drainage requirements
- Site-specific restrictions
Professional design and construction remain essential to ensure the project is fully compliant.
House Extensions Up to 45m²
The regulations also increase the exempted allowance for house extensions.
For many homeowners this means:
- Larger kitchens
- Open-plan living spaces
- Dining room extensions
- Family rooms
- Home offices
- Utility rooms
A well-designed extension often provides significantly more value than moving house, while avoiding stamp duty, legal costs and the disruption of relocating.
New Garden Homes (32–45m²)
One of the biggest changes introduced in 2026 is the ability to build a detached self-contained residential unit in your rear garden without planning permission, provided the development satisfies the exemption criteria.
These units are ideal for:
- Elderly parents
- Adult children
- Independent family accommodation
- Guest accommodation
- Long-term family living
The regulations include conditions relating to:
- Floor area
- Location within the site
- Connection to the main dwelling’s services
- Compliance with Building Regulations
- Occupancy and use restrictions
Not every property will qualify, which is why professional assessment is essential before construction begins.
Who Can Benefit?
The new exemptions are particularly suitable for homeowners looking to:
- Add space for a growing family
- Create accommodation for relatives
- Increase property value
- Future-proof their home
- Improve energy efficiency
- Build a modern extension
- Avoid the uncertainty of a full planning application (where exemptions apply)
Important Exemptions and Restrictions
Although the new regulations are generous, they do not automatically apply to every property.
Planning exemptions may not apply where:
- The property is a Protected Structure.
- The home is located within certain conservation or restricted areas.
- The site cannot satisfy setback, servicing or access requirements.
- The proposed development exceeds the permitted size or fails to meet exemption conditions.
- Other statutory restrictions affect the property.
Every site should be assessed individually before work begins.
Why Choose Tutum Homes?
At Tutum Homes, we’ve built our reputation on delivering high-quality home extensions, renovations and residential construction projects across Ireland.
Our experienced team understands both the new legislation and the practical realities of building exceptional homes.
We provide a complete turnkey service including:
Initial Consultation
We listen to your ideas and assess what’s possible for your property.
Site Assessment
We’ll determine whether your proposed project qualifies under the new exempted development regulations.
Design & Planning
Our designers create practical, beautiful spaces that maximise your home’s potential.
Compliance
We ensure your project complies with
- Building Regulations
- Structural requirements
- Energy performance standards
- Fire Safety regulations
- Irish construction best practice
Construction
Our experienced trades deliver high-quality workmanship using trusted materials and proven construction methods.
Project Management
From the first meeting through to final handover, we manage every stage so you don’t have to.
Frequently Asked Questions
Does exempt mean no regulations?
No. All construction must still comply with Building Regulations and other legal requirements.
Do I still need planning permission?
Not necessarily. If your project fully complies with the exempted development regulations, planning permission may not be required. However, every property is different and should be professionally assessed.
Can Tutum Homes check if my property qualifies?
Absolutely. We’ll review your site, explain the regulations in plain English and advise whether your project can proceed under the exemptions or requires planning permission.
Can Tutum Homes handle everything?
Yes. We offer a complete design-and-build service, from feasibility and design through construction and final completion.
Start Your Project with Confidence
The 2026 planning changes present an excellent opportunity for Irish homeowners to add valuable living space with fewer planning hurdles.
However, understanding the regulations—and ensuring your project is compliant—requires expert guidance.
Tutum Homes combines years of construction experience with in-depth knowledge of Ireland’s latest planning regulations to deliver high-quality extensions and garden homes that are built to last.
Thinking about building an extension or garden home? Contact Tutum Homes today for a no-obligation consultation and discover how we can transform your property with a professional, stress-free building experience.