InvalidExtensionDecided 2 April 2026

18, Greenfield Road, Mount Merrion, Dublin, A94A0W7

Demolition of a side garage and rear sunroom to build new single-storey extensions and a front porch.

D26B/0182/WEB · Dun Laoghaire Rathdown County Council · Lodged 25 March 2026

Reference: D26B/0182/WEB
Authority: Dun Laoghaire Rathdown County Council
Register status: Decided
Type: Permission
Received: 25 March 2026

Summary

AI-generated

The development consists of the demolition of an existing single-storey side garage, rear sunroom, and shed. It will be replaced with a new single-storey front porch, single-storey side and rear extensions, a first-floor rear bay window extension, and associated rooflights and site works.

Extensiondemolitionextensionsuburban

Storeys: 2

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

The development will consist of: (i) demolition of the existing single-storey garage to the west (side) of the dwelling, together with the glazed sunroom and shed to the south (rear); (ii) construction of a single-storey pitched-roof porch to the north (front) elevation; (iii) construction of a single-storey flat roof extension to the west (side) and south (rear); (iv) construction of bay window extension with pitched roof to 1st floor level at south (rear) facade; (v) installation of velux rooflights to the north (front) and west (side) roof slopes; (vi) reduction in size of a first-floor window to the west (side) elevation; (vii) formation of a 1-metre-wide side passage to provide rear access; and (viii) all associated site development and ancillary works.

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
18 Greenfield Road, Mount Merrion, Blackrock	Oct 2025	€1,350,000	7 m
49 The Rise, Mount Merrion, Blackrock	Sept 2025	€1,305,000	112 m
St Anthonys, 19 Greygates, Stillorgan Rd	Oct 2025	€1,650,000	194 m
45 Greenfield Rd, Mount Merrion, Dublin	Nov 2025	€1,390,000	198 m
Seven Churches, Glendalough, Co Wicklow	Sept 2025	€351,000	204 m
Apartment No. 7, Greysgate Hall, Mount Merrion	Jan 2025	€640,000	227 m
Apartment 9 Greygates, Roebuck Ave, Mount Merrionprice excludes VAT	Jan 2026	€190,000	239 m
57 Wilson Road, Mount Merrion, Blackrockprice excludes VAT	Nov 2025	€1,563,880	242 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 received25 March 2026
Decision due25 May 2026
Decision issued2 April 2026

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