Thinking of an attic conversion? Find out when planning permission is needed in Ireland — especially if you’re adding dormer windows. Learn the key rules, Building Regulations, and what to watch for in conservation areas.

New planning exemptions come into effect on 27 July 2026, bringing the biggest changes to exempted development rules in years. From habitable garden homes and larger extensions to dormers, sheds and heat pumps, here's what every homeowner needs to know.