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• Granny flat planning permission in Ireland — the family-flat condition and the 2026 exemptionDublin councils granted 102 of the 122 granny-flat and family-flat applications they decided in the 12 months to September 2026. When an attached flat needs permission, what Class 3A exempts from 27 July 2026, and the condition every grant carries.
• 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.
• An Bord Pleanála appeal, now An Coimisiún Pleanála — four weeks, €220, and a 25% reversal rateThe Commission reversed the council in 25% of the 1,195 Dublin-area appeals decided in the two years to September 2026. Who can appeal, the four weeks, the €220 fee, why 240 appeals a year fail on procedure, and the odds by direction.
• The most refused planning application types in Dublin — retention first, apartments second, extensions lastRetention applications were refused 27% of the time across the Greater Dublin councils in 12 months (140 of 510 decided), apartments 20%, new houses 15% and extensions 7%. The refusal share by development type, why the mix matters more than the council, and what the register says about where each type fails.