Core Refusal Reason
The Inspector recommends overturning the Planning Authority's refusal and granting retention permission, concluding that the garden studio is an ancillary residential use that is subordinate in scale, has no adverse visual or residential amenity impacts, and that concerns regarding self-contained use can be mitigated via condition.
Decision Maker's Conclusion
- The development is acceptable in principle under the 'RES' zoning as a residential use ancillary to the main dwelling.
- A refusal of permission is considered disproportionate given the structure only marginally exceeds exempted development thresholds (27sq.m footprint vs 25sq.m limit) and has no undue impact on the privacy or amenities of neighboring properties.
- Legitimate concerns regarding the potential use of the structure as an independent habitable unit can be effectively addressed through a planning condition restricting its use to purposes incidental to the enjoyment of the house.
Cited Policies (CDP)
Policy H14 (Residential Extensions)H14 Objective 1H14 Objective 2Section 6.8 (Residential Consolidation)Section 6.8.2 (Residential Extensions)Section 12.6.8 (Residential Consolidation)Policy G14 (Sustainable Drainage Systems)Section 12.11.1 (Water Management)SDCC House Extension Design Guide 2025 (Section 3.6, BFP 6)
Decision Document Summary
The appeal relates to the retention of a 3sq.m portion of an existing 27sq.m garden studio at 86 Hunters Walk, Ballycullen. South Dublin County Council had refused permission on the basis that the inclusion of a kitchenette and toilet made the structure resemble a self-contained unit, contrary to the 2025 House Extension Design Guide. The Inspector notes that the structure evolved from a 2003 building (12sq.m) with a 2020 extension (8sq.m), resulting in an external footprint slightly above the e...SOURCE PDFOpen Original
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