Core Refusal Reason
The proposed extension is considered an independent dwelling rather than an ancillary unit due to its excessive scale, and its physical massing would negatively impact the residential amenities of the neighboring property.
Decision Maker's Conclusion
- The proposed granny flat extension's floor area of 61.60 sq. metres is excessive, failing to qualify as an ancillary element and instead functioning as a separate independent dwelling.
- The single-storey side extension would be visually obtrusive and overbearing for the residents of the adjoining property at No. 15 due to its length, scale, and proximity to the boundary.
- The development would be injurious to the visual and residential amenities of the area, depreciate property values, and set an undesirable precedent for similar future developments.
Cited Policies (CDP)
Section 8.2.3.4 (i)Section 8.2.3.4 (iii)
Decision Document Summary
This application proposed a family member/granny flat extension at 13 Callary Road, Mount Merrion, Co. Dublin. Dún Laoghaire-Rathdown County Council refused permission primarily because the extension's size and design would create an independent dwelling rather than an ancillary unit, violating specific County Development Plan provisions. Furthermore, the extension's proximity to the boundary was deemed to have a significant overbearing impact on the neighboring property, which would negatively ...SOURCE PDFOpen Original
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