Core Refusal Reason
The proposed development constitutes overdevelopment of a restricted site, resulting in inadequate and poorly configured private open space which fails to provide a satisfactory standard of residential amenity for current and future occupants.
Decision Maker's Conclusion
- The physical design, height, and massing of the two-storey extension are considered acceptable in principle and would not cause significant overshadowing or overbearing impacts on adjacent properties.
- The remaining private open space (approx. 18.2sqm) is seriously deficient for a four-bedroom house, falling significantly short of the 70sqm Development Plan requirement and the 25sqm minimum often used as a benchmark for exempted development.
- The proposal, in combination with the existing large shed at the rear, represents overdevelopment of the site that would result in a very poor quality of residential amenity for the occupants.
Cited Policies (CDP)
Objective RESPolicy H18H18 Objective 1Section 11.3.1(iv)Section 11.3.3(i)South Dublin County Council House Extension Design Guide (2010)
Decision Document Summary
The applicant sought permission for a 44sqm two-storey rear extension to an existing 105sqm semi-detached house at 21 Belgard Green, Tallaght. The site is constrained and already contains a large 40sqm detached shed in the rear garden. While the Planning Authority cited three reasons for refusal including impacts on neighbors, the Board Inspector focused primarily on the internal site standards. The Inspector noted that while the extension's design was reasonable and would not unduly affect the ...SOURCE PDFOpen Original
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