Core Refusal Reason
The extension is built over a 600mm public surface water sewer, violating the required 6-meter wayleave and impeding maintenance access.
Decision Maker's Conclusion
- The development is situated directly over a 600mm diameter public surface water sewer traversing the site.
- The structure fails to maintain the mandatory 6.0-meter wayleave (3 meters on either side) required for public infrastructure.
- Retention of the extension would significantly impede the Council's ability to access and maintain the sewer, contrary to the County Development Plan 2022-2028.
Cited Policies (CDP)
Section 7.1.1 of Appendix 7
Decision Document Summary
This application sought retention permission for a 32.5sqm single-storey rear extension at 8 Saint Thomas Mead, Mount Merrion. The proposal was refused by Dun Laoghaire Rathdown County Council because the extension was constructed over a critical 600mm public surface water sewer. The local authority determined that the development violates the required 6-meter wayleave, thereby obstructing essential maintenance access and conflicting with the technical standards set out in the County Development...SOURCE PDFOpen Original
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