Awaiting decisionExtensionDecision due in 8 days (31 July 2026)

35 Mount Symon Dale, Clonsilla, Dublin 15, D15 A3V1

Single-storey rear extension and attic conversion with a rear dormer window.

FW26A/0232E · Fingal County Council · Lodged 8 June 2026

Reference: FW26A/0232E
Authority: Fingal County Council
Register status: In progress
Type: Permission
Received: 8 June 2026

Summary

AI-generated

The development will consist of a single-storey extension to the rear of the property. It also includes altering the existing hip roof to a gable roof to facilitate an attic conversion for non-habitable storage/office space, complete with a flat roof dormer and two windows to the rear.

Extensionextensionattic conversiondormer

Storey: 1

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 single storey extension to rear, alterations to the existing hip roof to create a gable roof to accommodate conversion of the attic space into a non-habitable storage/office space, flat roof dormer to rear constructed with two windows and all associated ancillary works.

Land-use zoning

What this land is zoned for

RS - ResidentialRS

“Provide for residential development and protect and improve residential amenity”

National zoning type: Existing residential

Objective set by the The Fingal Development Plan 2023 – 2029 (2023–2029). 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
23 Mount Symon Dale, Clonsilla, Dublin 15	Aug 2025	€480,000	42 m
78 Allendale Sq, Clonsilla, Dublin 15	Dec 2025	€362,500	85 m
74 Allendale Sq, Clonsilla, Dublin 15	May 2025	€347,000	85 m
91 Allendale Sq, Clonsilla, Dublin 15	Feb 2026	€316,000	124 m
8 Stonebridge Dr, Clonsilla, Dublin 15	Jan 2026	€380,000	129 m
17 Mount Symon Green, Clonsilla, Dublin 15not full market price	Apr 2026	€185,000	142 m
14 Mount Symon Green, Clonsilla, Dublin 15	Oct 2025	€562,000	145 m
137 Allendale Sq, Clonsilla Dublin 15, Dublin	May 2025	€335,000	177 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 received8 June 2026
Decision due31 July 2026

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