Core Planning Reasoning
The proposed first-floor extension, when considered in combination with the existing ground-floor extension, would significantly injure the residential amenities of the adjacent property (No. 118) due to overshadowing and a substantial reduction in daylight, making it contrary to the RES zoning objective and policies H13 and H14 of the South Dublin County Development Plan 2022-2028.
Decision Maker's Conclusion
- The proposal results in a clear failure of the 45-degree rule when the cumulative impact of the existing and proposed extensions is assessed against the neighboring property.
- The development will cause a noticeable and permanent negative impact on residential amenity by reducing potential sunlight hours to both the neighboring house and its garden.
- The extension is visually incongruous and overbearing, violating specific Development Plan objectives intended to protect the character and amenities of established residential areas.
Cited Policies (CDP)
South Dublin County Development Plan 2022-2028RES Zoning ObjectiveSection 6.8Policy H13Policy H13 Objective 5Section 6.8.2Policy H14Policy H14 Objective 1Chapter 12: Implementation and MonitoringSouth Dublin County Council House Extension Design Guide 2010
Decision Document Summary
The application seeks permission for a small 4.5 sq. m. first-floor extension over an existing ground-floor rear extension at 116 Cherryfield Road, Walkinstown, a mid-terrace dwelling. While South Dublin County Council initially granted permission subject to conditions, the decision was appealed by a third party (Chris Campbell). The site context involves a dense terraced streetscape where residential consolidation is encouraged but must be balanced against amenity protection. The Inspector’s ke...SOURCE PDFOpen Original
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