GrantedExtensionDecided 20 March 2019

20 Castle Park, Monkstown, Co Dublin

Demolition of a shed, construction of a single-storey extension, and conversion of a garage into a granny flat in Monkstown.

D19A/0044 · Dun Laoghaire Rathdown County Council · Lodged 24 January 2019

Reference: D19A/0044
Authority: Dun Laoghaire Rathdown County Council
Register status: Decided
Type: Permission
Received: 24 January 2019

Summary

AI-generated

The project involves demolishing an existing rear shed and building a new single-storey side and rear extension. It also includes converting the existing garage into a granny flat with a rear extension, adding a new attic dormer window, a front porch, and widening the entrance.

Extensiongranny flatgarage conversiondormer

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

Permission for demolition of existing shed to rear, construction of a new single storey extension to side and rear. Conversion of existing garage for use as a granny flat with single storey extension to rear and new velux roof lights to existing garage roof. Alterations to 2 no. Bathroom windows to rear at first floor level. New dormer window to rear at attic level. New porch to front elevation, widening of existing entrance along with ancillary site works.

Built & sold

What happened next

Beyond the decision: whether this development was built, and what property here has sold for.

Built — construction complete

A commencement notice records works starting on 20 September 2019.

Notified floor area: 229.54 m²

Recent sales nearby

within 500 m

Residential Property Price Register sales within 500 metres of this site
Address	Date	Price	Distance
29 Castle Park, Monkstown, Dublin	Jan 2026	€1,400,000	88 m
25 Dunedin Terrace, Monkstown, Dublinnot full market price	Oct 2025	€333,333	130 m
17 Glandore Court, Dun Laoghaire, Glandore Park	Jun 2026	€412,500	136 m
30 St Patricks Crescent, Monkstown, Dublin	Apr 2025	€520,000	148 m
39 Castle Park, Monkstown, Dublin	Feb 2026	€1,255,000	170 m
3 The Mews, Monkstown Castle, Monkstown Ave	Aug 2025	€865,000	182 m
13 Glandore Park, Lower Mounttown Rd, Dun Laoghaire	Sept 2025	€805,000	190 m
40 Meadowlands Ave, Mounttown, Dun Laoghaire	Jul 2025	€545,045	195 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 received24 January 2019
Decision issued20 March 2019

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