SD21B/0413

Part demolition of existing rear single storey extension and proposed new two storey flat roof extension with roof lights and all associated works.

Refused

Core Refusal Reason

The proposed first-floor rear extension is of excessive depth, resulting in significant overbearing impacts, overshadowing, and loss of residential amenity for neighboring properties.

Decision Maker's Conclusion

  • The excessive length and depth of the first-floor extension would result in significant overshadowing and an overbearing visual impact on the adjoining properties at No. 4 and No. 9 Willbrook Street.
  • The development would create an undesirable 'tunnelling effect' and set a negative precedent that detracts from the residential amenities of the vicinity.
  • The proposal fails to comply with the SDCC House Extension Design Guide (2010) and contravenes the 'RES' zoning objective to protect and improve residential amenity.

Cited Policies (CDP)

RES land-use zoning objectiveSouth Dublin County Development Plan 2016 - 2022SDCC House Extension Design Guide (2010)

Decision Document Summary

The proposal involved the partial demolition of an existing single-storey rear extension and the construction of a new two-storey extension at 3 Willbrook Street, Rathfarnham. The Planning Authority refused permission because the first-floor element extended beyond the established building lines of neighboring properties, specifically impacting No. 4 and No. 9. The scale of the development was deemed to cause unacceptable overbearing impacts and overshadowing, failing to meet the standards set o...
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