GrantedExtensionDecided 24 February 2026

18, St Fintans Villas, Deansgrange, Blackrock, Co Dublin, A94H5PO

Demolition of a rear extension and construction of a new two-storey extension in Blackrock.

D25B/0736 · Dun Laoghaire Rathdown County Council · Lodged 22 December 2025

Reference: D25B/0736
Authority: Dun Laoghaire Rathdown County Council
Register status: Decided
Type: Permission
Received: 22 December 2025

Summary

AI-generated

The project involves knocking down an existing ground floor extension to the rear of the house. In its place, a new two-storey extension will be built, adding 52.3 square metres to the ground floor and 29 square metres to the first floor. The works will also include reconfiguring the internal layouts and associated site works.

Extensionextensionsuburban

Storeys: 2
Floor area: 81 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 the demolition of existing ground floor extension to the rear. The construction of a two storey extension comprising of 52.3sq. M. To the ground floor with associated fenestration;s and part flat roof over & 29 sq. M to the first floor with associated fenestrations and flat roof over. Reconfigured ground & first floor layouts and all associated site works on a site area of 0.0356 ha.

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
16 St Fintans Villas, Deans Grange, Blackrockprice excludes VAT	Jan 2026	€1,092,511	22 m
14 St Fintan'S Villas, Deansgrange, Blackrock	Apr 2026	€480,000	53 m
25 St Fintans Villas, Deansgrange, Dublin	Aug 2025	€852,500	85 m
7 St Fintans Villas, Deans Grange, Blackrock	Jun 2026	€725,000	91 m
33 St Fintans Park, Deans Grange, Blackrock	Dec 2025	€570,000	107 m
3 St Fintans Villas, Deans Grange, Dublin	Mar 2026	€525,000	121 m
29a St Fintans Villas, Deansgrange, Dublin	Oct 2025	€830,000	127 m
29 St Fintan's Villas, Deansgrange, Co Dublin	Sept 2025	€508,000	127 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 received22 December 2025
Decision due24 February 2026
Decision issued24 February 2026

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