InvalidExtensionDecided 29 May 2026

48, Deerpark Road, Mount Merrion, Co Dublin, A94K3T7

First floor extension, attic conversion with roof changes, and a bike shed at 48 Deerpark Road.

D26B/0316/WEB · Dun Laoghaire Rathdown County Council · Lodged 21 April 2026

Reference: D26B/0316/WEB
Authority: Dun Laoghaire Rathdown County Council
Register status: Decided
Type: Permission
Received: 21 April 2026

Summary

AI-generated

The development consists of a 31.30 sq m first floor extension to the front, side, and rear of the dwelling. It also includes a 30 sq m attic conversion changing the roof from hipped to a gable end with a rear dormer, and a new bike shed in the front garden.

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Floor area: 61 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 first floor extension to front, side & rear of dwelling (floor area 31.30m. Sq. ), conversion of attic space and replacement of the existing ‘hipped roof’ structure with a ‘gable end’ roof structure incorporating the raising of the first floor side wall of the dwelling, together with a dormer & windows on the rear elevation and associated internal modifications (floor area 30.0m. Sq. ), bike shed (3.0m. Sq. ) to be located in front garden and associated site works.

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
44 Deerpark Rd, Mount Merrion, Dublin	Dec 2025	€1,250,000	26 m
47 Deerpark Rd, Mount Merrion, Blackrock	Mar 2025	€800,000	58 m
19 Wilson Rd, Mount Merrion, Dublin	Mar 2026	€1,116,111	93 m
24 Deerpark Road, Mount Merrion, Co Dublin	Jun 2025	€1,270,000	131 m
4 Wilson Crescent, Mount Merrion, Dublin	Nov 2025	€1,210,000	154 m
6 Wilson Crescent, Mount Merrion, Dublin	Jul 2025	€980,000	159 m
55 Wilson Road, Mount Merrion, Blackrockprice excludes VAT	Nov 2025	€1,585,903	168 m
56 Wilson Road, Mount Merrion, Blackrockprice excludes VAT	Apr 2026	€1,475,771	174 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 received21 April 2026
Decision due22 July 2026
Decision issued29 May 2026

In the area

Applications near this site

Other planning applications within about 500 m — what else is being proposed or built nearby.

Related developments

Similar applications

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Community

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