SD25B/0426

a) Single storey flat roof extension to the rear with 1no rooflight, b) 2 storey extension to the side c) new flat roof to existing front porch, d) retention permission for widening of existing site entrance with new rendered block piers and boundary wall and all associated site works

Split decision

Core Reason for the Refused Part

The retention of the widened vehicular access and modified boundary walls was refused due to excessive width, inadequate sightlines, and negative visual impact.

Decision Maker's Conclusion

  • The as-constructed widened vehicular access and modified boundary walls fail to meet standards regarding access width and the demonstration of safe sightlines.
  • The development results in a negative visual impact that is contrary to the South Dublin County Council House Extension Design Guide and car parking layout policies.
  • Granting retention would establish an undesirable precedent for similar developments, which would cumulatively harm the residential amenities and character of the area.

Cited Policies (CDP)

BFP7 of the 2025 SDCC House Extension Design GuideSection 12.7.6 Car Parking Design and Layout of the 2022-2028 CDP

Decision Document Summary

The proposal at 68 Hillside Park, Rathfarnham, involved a single-storey rear extension and a two-storey element, alongside the retention of a widened vehicular entrance and modified boundary walls. While the Planning Authority granted permission for the residential extensions, it issued a split decision refusing retention for the site access works. The refusal was based on the entrance's excessive width and lack of sightline documentation, which were deemed contrary to the 2022-2028 County Devel...
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