GrantedExtensionDecided 7 May 2026

12, The Close, Mount Merrion, Blackrock, Co. Dublin, A94DH57

Demolition of outbuildings and construction of two-storey side and single-storey rear extensions in Mount Merrion.

D26B/0172/WEB · Dun Laoghaire Rathdown County Council · Lodged 25 March 2026

Reference: D26B/0172/WEB
Authority: Dun Laoghaire Rathdown County Council
Register status: Decided
Type: Permission
Received: 25 March 2026

Summary

AI-generated

The project involves the demolition of a side extension and outbuilding, followed by the construction of a two-storey side extension and a single-storey rear extension. It also includes roof modifications and a full refurbishment of the dwelling.

Extensionextensiondemolitionrenovation

Floor area: 27 m²

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 (a) demolition works to include (i) the 5.4sqm existing single-storey side extension. (ii) the 6.5sqm existing single-storey outbuilding. (iii) removal of the west section of the existing roof to accommodate a new roof. (iv) removal of the roof to the existing rear extension to accommodate a new roof. (v) partial removal of external and internal walls to accommodate the proposed works. (b) the construction of (i) a 11.9sqm two-storey side extension to the west of the existing dwelling. (ii) a 15sqm single-storey rear extension to the south of the existing dwelling. (iii) a new roof connecting the existing and proposed rear extensions. (c) the extension of the existing roof to the west to cover the existing and proposed side extensions, to include a rooflight to the rear pitch. (d) a full refurbishment of the existing dwelling. (e) all associated site 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
33 North Avenue, Mount Merrion, Blackrock	Sept 2025	€2,365,000	132 m
45 Greenfield Rd, Mount Merrion, Dublin	Nov 2025	€1,390,000	148 m
32 St Thomas Rd, Mount Merrion, Dublin	Mar 2025	€1,900,000	161 m
14 St Thomas Road, Mount Merrion, Blackrock	Jul 2025	€1,750,000	186 m
49 The Rise, Mount Merrion, Blackrock	Sept 2025	€1,305,000	210 m
19 Cypress Road, Mount Merrion, Dublin	Jun 2026	€1,210,000	227 m
9 Cypress Road, Mount Merrion, Co Dublin	Jun 2026	€1,230,000	234 m
58 Wilson Road, Mount Merrion, Blackrockprice excludes VAT	Mar 2026	€1,550,660	248 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 due19 May 2026
Decision issued7 May 2026

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