SD25A/0075W

The development will consist of the extension modification and material change of use of an existing two storey three-bedroom terrace house measuring 109.4 m2 into a five-bedroom two storey plus loft conversion house measuring 226.4 m2. The rear shed which measures 71.7 m2 will be converted into a two-bedroom single storey granny flat measuring 71.7 m2. The application will include all alterations to the existing services and drainage ancillary to the development. There will be no additional parking or changes to the front garden wall and front site entrance.

Split decision

Core Reason for the Refused Part

The proposed upper-floor extensions and detached family flat constitute overdevelopment that would negatively impact residential amenity and create a traffic hazard via a substandard laneway.

Decision Maker's Conclusion

  • The scale, bulk, and layout of the first and second-floor extensions represent overdevelopment that would be visually obtrusive and overbearing for adjoining properties.
  • The detached family flat fails to meet design criteria regarding internal connectivity and demonstrated need, presenting as an unauthorized separate dwelling rather than an ancillary unit.
  • The proposed access via a narrow rear laneway lacking footpaths and lighting is substandard and would endanger public safety by creating a traffic hazard.

Cited Policies (CDP)

RES zoning objectiveSection 12.6.8 (Residential Consolidation- Extensions)BFP 1BFP 4BFP 5BFP 6BFP 7Section 12.6.8 (Family Flats)

Decision Document Summary

The application at 103 Saint Maelruan's Park, Tallaght, proposed a ground floor extension, first and second-floor extensions, and a detached family flat. While the ground floor works were permitted, the Planning Authority refused the upper-level extensions and the family flat due to concerns over excessive bulk and overdevelopment. The refusal also highlighted that the family flat lacked the required internal link to the main house and that the proposed vehicular access via a narrow rear laneway...
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Planning application SD25A/0075W, South Dublin County Council | Precedent.ie