InvalidHousing estateDecided 11 June 2020

Site of c. 1.39 ha, Thornhill House, CherryGarth, Mount Merrion, Blackrock, Co. Dublin

Reconfiguration of a permitted housing development to increase the number of homes from 9 to 15.

D20A/0274 · Dun Laoghaire Rathdown County Council · Lodged 30 March 2020

Reference: D20A/0274
Authority: Dun Laoghaire Rathdown County Council
Register status: Decided
Type: Permission
Received: 30 March 2020

Summary

AI-generated

The proposal seeks to redesign and reconfigure previously permitted housing units at Thornhill House. This change will increase the density from 9 houses to 15 houses, alongside adjustments to the internal road layout and the relocation of an ESB substation.

Housing estateredesignhousing density

Residential units: 15

Generated from the description above by an AI model and may contain mistakes. The council’s description is the authoritative record.

Official record

Development description

Permission for development. The proposed development will consist of the reconfiguration and redesign of the permitted housing units (dun laoghaire rathdown county council reg. Ref. D17a/0240; an bord pleanála ref. Pl06d. 300244) to provide an increase from 9 no. Houses (comprising 4no. Four bed and 5no. Five bed units to 15 no. Houses (comprising 3no. Three bed and 12no. Four bed units). Additional works include reconfiguration of the internal road layout, relocation of esb substation, amendm...

Land-use zoning

What this land is zoned for

Objective ARS

“A To provide residential development and improve residential amenity while protecting the existing residential amenities”

Objective set by the COUNTY DEVELOPMENT PLAN 2022-2028 (2022–2028). The planning authority decides each application on its own merits — this is the zoning context, not a compliance assessment.

Read the zoning objectives in the development plan

Built & sold

What happened next

Beyond the decision: whether this development was built, and what property here has sold for.

Recent sales nearby

within 500 m

Residential Property Price Register sales within 500 metres of this site
Address	Date	Price	Distance
61 The Stables, Thornhill Oaks, Mount Merrionprice excludes VAT	Aug 2025	€889,868	27 m
50 Thornhill Oaks, Cherry Garth, Mount Merrion	Sept 2025	€1,500,000	47 m
Thornhill, Cherry Garth, Mount Merrion	Aug 2025	€1,750,000	49 m
49 Thornhill Oaks, Cherry Garth, Mount Merrion	Dec 2025	€1,430,135	50 m
63 Thornhill Oaks, Blackrock, Co. Dublin	May 2026	€870,000	51 m
Apt.28 - Thornhill Oaks, Cherry Garth - Mount Merrion, Blackrock	Jul 2025	€999,999	53 m
49 Thornhill Oaks, Cherry Garth, Mount Merrionprice excludes VAT	Jan 2025	€1,145,374	58 m
62 Thornhill Oaks, Blackrock, Co. Dublinprice excludes VAT	Mar 2026	€859,031	62 m

Nearby properties, not this site — a guide to local values.

Sources: Building Control Management System (commencement notices) and the Residential Property Price Register, licensed under CC BY 4.0. Records are matched to this application by location and may not be exhaustive; always confirm against the official source before relying on them.

Key dates

Timeline

Application received30 March 2020
Decision issued11 June 2020

In the area

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