Core Refusal Reason
The proposed development fails to meet the criteria for ancillary family accommodation as it results in a functionally separate detached dwelling unit that is out of character with the established pattern of development and would set a poor precedent for backland residential development.
Decision Maker's Conclusion
- The 27-metre physical separation between the main house and the garden room means the proposal fundamentally constitutes a separate dwelling unit rather than an integrated extension.
- The proposed covered walkway is out of character with the area and would introduce an undesirable third residential building line between established streets.
- The development is contrary to the Dublin City Development Plan 2022-2028 and would seriously injure the residential amenities of adjoining properties.
Cited Policies (CDP)
Appendix 18, Section 7.0 (Ancillary Family Accommodation)Zoning Objective Z1 (to protect, provide and improve residential amenities)
Decision Document Summary
The proposal involves converting a 40sqm garden room at the rear of 215 Griffith Avenue—originally permitted only for incidental use—into a family flat for a relative with medical needs. The plan includes a 27m long covered walkway intended to 'link' the flat to the main house. Despite the applicant's arguments regarding medical necessity and physical connectivity, the Inspector determined that the structure remains a 'distinct entity' due to its backland location and significant distance from t...SOURCE PDFOpen Original
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