SD21B/0074
Construction of a new two storey extension to rear of existing semi-detached dwelling and associated site works; Ground floor extension (40sq.m) comprising of kitchen, dining/lounge space & utility room with provision of extensive green flat roof and 2no. roof-lights above; First floor extension (4sq.m) will comprise of bathroom with flat roof & 1no. roof-light above.
Split decision
Core Reason for the Refused Part
The first-floor extension was refused due to its excessive mass and height, which would cause a negative impact on the residential amenity of the neighboring property through overshadowing and loss of daylight.
Decision Maker's Conclusion
- The massing of the first-floor extension, featuring a 1.8m depth and 5.7m ridge height, would result in significant overshadowing and loss of daylight to the adjacent property at No. 81 St John’s Wood.
- The proposal fails to adhere to the 'RES' zoning objective which aims to protect and improve residential amenity in the South Dublin County Development Plan 2016-2022.
- The first-floor bathroom element is contrary to the South Dublin House Extension Design Guide, as it does not prevent the loss of daylight to the windows of the closest habitable rooms in the neighboring property.
Cited Policies (CDP)
Zoning Objective RESSouth Dublin County Development Plan 2016 - 2022South Dublin House Extension Design Guide
Decision Document Summary
The proposal involved the construction of a two-storey rear extension to a semi-detached house at 80 St John's Wood, Clondalkin. The Planning Authority issued a split decision, granting permission for the 40sq.m ground floor extension while refusing the 4sq.m first-floor bathroom component. The refusal was primarily based on the first floor's scale and proximity to the boundary, which was deemed to negatively impact the residential amenity of the neighboring occupier at No. 81 through loss of li...SOURCE PDFOpen Original
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