C.40sqm prefabricated garden room/granny flat in the rear garden of home at 11, Liffey Downs
11, Liffey Downs, Liffey Valley Park, Lucan, K78 PK40
0.04 ha · Granted on appeal, June 2026 · permission to Jun 2031 (estimate)
Planning application SD26A/0024W to South Dublin County Council: C.40sqm prefabricated garden room/granny flat in the rear garden of home, at 11, Liffey Downs, Liffey Valley Park. Refused by the council on 25 March 2026; granted on appeal by An Coimisiún Pleanála on 26 June 2026. The permission normally runs to June 2031 (an estimate: the grant plus five years).
Timeline
- Application lodged
- Council refused
- Appealed to An Coimisiún Pleanála
- Granted on appeal
- Permission normally ends (estimate)
The end date is an estimate: the grant plus five years, the normal life of a permission. An extension or a commencement changes it.
Key facts
Proposed development
Retention of a c.40sqm prefabricated garden room/granny flat in the rear garden of home.
Planning status
Permission was granted on appeal by An Coimisiún Pleanála on 26 Jun 2026. That decision is final, subject only to a High Court judicial review. Works can start once a commencement notice is lodged; the permission normally runs to Jun 2031 (estimate).
Appeal PL-501136-SD-26 on the An Coimisiún Pleanála website ↗
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Nearby applications
Other applications on the South Dublin register close to this address.
- SD26B/0018W11 Liffey Downs, Liffey Valley Park, Lucan, K78PK40Closed
Planning for Retention of a c.40sqm prefabricated garden room/granny flat in the rear garden
- SD24B/0527W3, Liffey Road, Liffey Valley Park, Lucan, Co. DublinOn Site
Conversion of existing attic space comprising of modification of existing roof structure, raising of existing gable c/w window…
- ED25/0090Esker Celtic FC Clubhouse, at Hermitage Park, Lucan, Co. DublinIn Assessment
Internal changes to the layout of the clubhouse to cater for the changing needs of the club and the replacement of an existing window with a double door.
- SD26B/0112W11, Liffey Glen, Liffey Valley Park, Lucan, Co. Dublin, K78X977On Site
Conversion of existing attic space comprising of modification of existing roof structure, raising of existing gable c/w window, new access stairs…
- SD25B/028615, Liffey Terrace, Liffey Valley Park, Lucan, Co. Dublin K78 E278Closed
Proposed new Dutch hip gable wall to the side of the existing house. A new flat roof dormer to the rear of the existing house roof converting the attic space…
- SD25B/043215, Liffey Terrace, Liffey Valley park, Lucan, Co.Dublin, K78 E278Granted
Proposed new Dutch hip gable wall to the side of the existing house. A new flat roof dormer to the rear of the existing house roof converting the attic space…
Related
About this page: the facts above come from the statutory public planning register kept by South Dublin County Council and are refreshed weekly (last updated 2 Sept 2026). Applicant names and contact details are not shown. Status labels are PlanningLeads' plain-language reading of the register status and the "Use" label is classified by AI from the public description (see how we use AI); neither is legal advice and the council's file is the record. How we handle this data: privacy notice.
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