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Thornhill Oaks, Mount Merrion

15 homes · Permitted, not started · Stillorgan · Dún Laoghaire-Rathdown

Thornhill Oaks is a scheme of 15 homes at Mount Merrion, Dún Laoghaire-Rathdown, built under planning permission D20A/0432. No commencement notice yet.

  • 15 homes permitted
Planning
D20A/0432, granted 14 Aug 2020
Building
Permitted, not started
Where
Mount Merrion, Stillorgan
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Planning permission · 1 · 15 homes

PermissionHomesDecidedBuilding
D20A/04321514 Aug 2020Not started

D20A/0432 on the register: Reconfiguration and redesign of permitted housing units to provide an increase from 9 houses to 15 houses.

Development land near Thornhill Oaks

Sites within 1 km with a public signal: permission running out or not started, council land for sale, derelict, stalled. Not linked to the scheme.

  1. Priory Drive

    6, Priory Drive, Stillorgan, Dublin, A94X205 · 0.14 ha · 472 m away

    Permitted, not started

  2. DERELICT, 65 DEERPARK ROAD, MOUNT MERRION, CO.DUBLIN

    515 m away

    Derelict site

  3. St. Annes Convent

    St. Annes Convent, Kilmacud Road Upper, Kilmacud, Stillorgan, Co. Dublin, A94P5W6 · 0.26 ha · 526 m away

    Permitted, not started

  4. Kilmacud House

    Dublin, A94 PW29 · 0.61 ha · 542 m away

    Stalled build

  5. Deerpark Road, Mount Merrion, Blackrock

    Deerpark Road, Mount Merrion,, Blackrock, A94 YX95 · 0.34 ha · 561 m away

    Stalled build

  6. The Orchard

    The Orchard, 1 The Hill, Stillorgan, Co. Dublin, D08C98X · 0.28 ha · 778 m away

    Permitted, not started

  7. Mount Anville Lands

    Mount Anville Lands, Lower Kilmacud Road, Dublin 14, D14KX80 · 2.56 ha · 854 m away

    Permitted, not started

  8. Residential land off South Avenue, Mount Merrion

    4.58 ha · 1 m away

    On the RZLT map (3% land tax)

See every site with a signal in Dún Laoghaire-Rathdown →

Other planning applications on the site

Amendments, conditions and later phases lodged on the same ground since the first permission, newest first.

  • D26B/0071/WEB · lodged 6 Feb 2026 · grant permission
    The development consists of the following: Conversion of existing attic space to
  • D25A/0862/WEB · lodged 12 Nov 2025 · grant permission
    Oak View Property Developments Limited, intend to apply for Retention Permission
  • D24B/0425/WEB · lodged 8 Oct 2024 · grant permission for retention
    Oak View Property Developments Limited, intend to apply for Retention Permissio
  • D24B/0345/WEB · lodged 30 Jul 2024 · grant permission
    Permission is sought for The conversion of existing attic space to new bedroom a
  • D24A/0059 · lodged 31 Jan 2024 · refuse permission
    Redesign of the permitted no. 40 Thornhill Oaks (D20A/0432, ABP308150-20) to
  • D23A/0782 · lodged 11 Dec 2023 · declare invalid (site notice)
    Redesign of the permitted No. 40 Thornhill Oaks (D20A/0432 ABP 308150-20) to now
  • D23A/0013 · lodged 9 Jan 2023 · withdraw the application
    Development will consist of the redesign of the permitted gatelodge house
  • D21A/0161 · lodged 26 Feb 2021 · refuse permission
    Permission for development. The proposed development will consist of

Other housing schemes nearby

Questions about Thornhill Oaks

How many homes are in Thornhill Oaks?
15 homes under planning permission D20A/0432.
Has building started at Thornhill Oaks?
Not yet: no commencement notice has been filed for planning permission D20A/0432.
Where is Thornhill Oaks?
Thornhill Oaks is at Mount Merrion, in the Stillorgan local electoral area of Dún Laoghaire-Rathdown.

New development land around Mount Merrion

We'll email you every Monday with the new development sites in Dún Laoghaire-Rathdown: permission running out, council land for sale, derelict or stalled. Free while in beta.

Is something wrong or missing?

This page is built from public records. We match the name homes are sold under to the planning permission from commencement notices, later applications and the homes sold there.

Sources: council planning registers and An Coimisiún Pleanála; commencement notices (National Building Control Office, BCMS); the Property Price Register (PSRA); the 4Dublin Housing Supply Pipeline (CC BY 4.0). On the register as: Site of c. 1.39 ha, Thornhill House, CherryGarth, Mount Merrion, Blackrock, Co. Dublin. Planning applications within 500 m · All housing schemes · Checked 14 Oct 2026