Battlestown, Rathroe

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• Retention planning permission in Ireland — refused 27% of the time, against 7% for extensionsOne in six Dublin applications is for retention, and 27% of retention decisions in the two years to September 2026 were refusals. When you need it, the treble fee, the seven-year rule and the sale-time problem.
• Garden room and granny flat planning permission — the 2026 Class 1A and 3A exemptionsDublin councils granted 89% of the 911 garden-room and granny-flat applications lodged in the two years to September 2026. Since 27 July 2026 a detached 32–45 m² garden dwelling can be exempt, with a 14-day notice to the council.
• Appeals overturned by council — how often An Coimisiún Pleanála reverses each Dublin council, and in which directionThe Commission reversed the council on 301 of 1,195 Dublin appeals decided in 24 months, 25%. South Dublin was reversed most (30%), Dublin City least (23%), and 76 of Fingal's 85 reversals turned a refusal into a grant. How the appeal works, what a reversal rate means, and how to read your council's number before you appeal.
• Judicial review of a planning decision in Ireland — eight weeks, substantial grounds, and who may bring oneThe Commission decided 510 appeals from the seven Dublin-area councils in the 12 months to September 2026, and each opened an eight-week judicial review window. What s.50 allows, what it costs, what the court can and cannot do, and how the 2024 Act changes standing.