20/08/2026
New regulations came into effect in July 2026, introducing a number of important changes to what homeowners can do without applying for planning permission.
Some of the key changes include:
🔹 Larger house extensions – the maximum exempted floor area has increased to 45m²
🔹 Larger garden structures – the allowance has increased to 30m²
🔹 New exemptions for certain dormer extensions and rooflights
🔹 New rules allowing the subdivision of some existing houses into self-contained units
🔹 New opportunities for detached accommodation in rear gardens
🔹 Changes relating to external wall insulation, heat pumps, bicycle/bin storage and chimney removal
But, as always with exempted development, there are conditions and limitations that need to be understood before work begins.
We've put together a straightforward guide explaining what has changed, the key measurements and what the new rules could mean for homeowners.
📖 Read our latest blog: New Planning Exemption Rules Ireland 2026 – What Homeowners Need to Know
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