GrantedExtensionDecided 21 January 2026

13, Thornberry Close, Woodside, Stepaside, Dublin 18, D18X5P1

Attic conversion, garage conversion, and a single-storey rear extension to a house in Stepaside.

D25B/0660/WEB · Dun Laoghaire Rathdown County Council · Lodged 20 November 2025

Reference: D25B/0660/WEB
Authority: Dun Laoghaire Rathdown County Council
Register status: Decided
Type: Permission
Received: 20 November 2025

Summary

AI-generated

The project involves converting the attic with a rear dormer, converting the garage into a dining room, and building a single-storey flat roof extension to the rear of the existing dwelling.

Extensionextensionattic conversiongarage conversion

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

Conversion of existing attic space comprising of modification of existing roof structure, new access stairs, roof windows to the front and flat roof dormer to the rear. Conversion of existing garage to dining room comprising of replacing garage door with new window and new access door from existing hall. Construction of single storey flat roof extension to the rear comprising of family room, replacement of existing rear patio doors and window with larger slider and all 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
3 Hyde Road, Belmont, Stepaside	Jul 2025	€805,000	26 m
2 Darley Lane, Belmont, Aiken'S Village	Apr 2026	€745,000	43 m
14 Hyde Road, Belmont, Stepaside	Jan 2025	€730,000	55 m
15 Hyde Road, Belmont Aikens Village, Stepaside	Feb 2025	€721,500	59 m
7 Ferncarrig Ave, Fernleigh, Sandyford	May 2026	€300,000	111 m
7 Ferncarrig Ave, Fernleigh, Sandyford	Jun 2026	€600,000	111 m
2 Verona, Kilgobbin Rd, Sandyford Dublin 18	Jan 2026	€560,000	119 m
7 Ferncarrig Court, Kilgobbin Rd, Sandyford Dublin 18	Feb 2026	€731,500	129 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 received20 November 2025
Decision due23 January 2026
Decision issued21 January 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

Ranked by what these developments actually propose, not by matching words — so you can see how comparable applications were decided.

Community

Discussion

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