SD21B/0134

Retention of change of use of existing detached single storey building to family flat. Permission for the construction of a single storey link extension from existing building to existing house; installation of a ground floor side window in existing house; minor internal amendments to existing structure and all associated site works.

Refused

Core Refusal Reason

The proposal fails to meet the criteria for a family flat due to excessive floor area relative to the main house, poor physical integration, overdevelopment of a constrained site, and non-compliance with a previous planning condition prohibiting human habitation.

Decision Maker's Conclusion

  • The family flat exceeds the 50% floor area threshold of the main dwelling and lacks a direct, substantial link, violating specific development plan standards for additional accommodation.
  • The scale and proximity of the structure result in overdevelopment that negatively impacts neighboring residential amenity through overbearing appearance and loss of private open space.
  • The development directly contravenes a previous planning condition (SD08B/0639) that explicitly restricted the building from being used for human habitation.

Cited Policies (CDP)

Section 11.3.3 Additional Accommodation (ii) Family FlatRES zoning objectiveSouth Dublin County Development Plan 2016-2022

Decision Document Summary

This application sought the retention of a change of use for a detached single-storey building to a family flat, including a new link corridor, at 31A Tamarisk Drive, Kilnamanagh. The local authority refused the application because the combined floor area of the flat and corridor exceeded 50% of the main house's area, and the physical connection was deemed tenuous. Furthermore, the development was found to be overbearing to adjacent properties, reduced private open space below acceptable levels,...
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