Core Refusal Reason
The proposed mansard roof is out of character with the established streetscape of 1940s hipped-roof bungalows and would be visually obtrusive; additionally, the rear extension is deemed injurious to the residential amenity of the adjoining property due to its scale and orientation.
Decision Maker's Conclusion
- The mansard roof (described as 'Dutch Barn' style) would create a visually dominant two-storey appearance that contrasts sharply with the single-storey hipped-roof character of Wilson Road.
- The proposed 3.5m high rear extension would negatively impact the evening sun and established residential amenity of the adjoining house at No. 41.
- The development is contrary to the Dun Laoghaire-Rathdown County Development Plan 2022-2028 as it fails to harmonise with the existing structure and the surrounding architectural context.
Cited Policies (CDP)
Section 4.3.1.2 (Policy Objective PHP19: Existing Housing Stock Adaptation)Section 12.3.7.1 (Extensions to Dwellings)Section 12.3.7.1 (ii) (Extensions to Rear)Section 12.3.7.1 (iv) (Alterations at Roof / Attic Level)Zoning Objective A
Decision Document Summary
The application seeks permission for an attic conversion featuring a new mansard roof and a 30 sq.m rear extension at 39 Wilson Road, Mount Merrion. The site is located on a residential road characterized by uniform 1940s bungalows with hipped roofs. The Planning Authority initially refused permission, a stance the Inspector supports. The Inspector's primary argument is that the roof's 'Dutch Barn' design would be overly prominent and incongruous with the streetscape's established rhythm. Furthe...SOURCE PDFOpen Original
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