Ballyknockan (ed St. Helen's), St. Helen's

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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.
• Change of use planning permission in Ireland — 84% granted, short-term letting 2 in 6Dublin councils granted 455 of the 544 change-of-use applications they decided in the 12 months to September 2026. What a material change of use is, which changes are exempt under Part 4, and why short-term letting is refused more than any other.
• Further information requests on a planning application — 21% of Dublin files, six months to reply21% of applications received by Dublin councils in the year to September 2026 drew a further information request. What the council is asking, the six-month deadline, what "significant" FI triggers, and what it does to neighbours' rights.
• 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.