70 Rowanbyrn, Blackrock, Co Dublin
First-floor extension to add three bedrooms, plus a front entrance extension in Blackrock.
D18B/0455 · Dun Laoghaire Rathdown County Council · Lodged 17 October 2018
- Reference
- D18B/0455
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 17 October 2018
Summary
AI-generatedThe project involves building a 36 sqm upper floor over the single-storey portion of the house to accommodate three bedrooms and a toilet. It also includes extending the front entrance forward, external insulation, and window alterations.
- Floor area
- 36 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
Permission for extending forward the entrance area by 1.6m. Building over the single storey portion of the house, including the extended area, an upper floor, comprising three bedrooms and toilet. Total of extension area is 36 sqm. Externally insulating those parts of the house as are exposed. Changing the ground floor window on the front elevation and raising the cill to transom level.
Land-use zoning
What this land is zoned for
“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 planBuilt & 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 19 July 2019.
Notified floor area: 36 m²
Recent sales nearby
within 500 m| Address | Date | Price | Distance |
|---|---|---|---|
| 50 Rowanbyrn, Blackrock, Dublin | Jul 2025 | €825,000 | 38 m |
| 117 Rowanbyrn, Blackrock, Co Dublinnot full market price | Sept 2025 | €255,109 | 120 m |
| Errigal, 1 Rowan Park Ave, Blackrock | Oct 2025 | €1,300,000 | 140 m |
| 23 Rowanbyrn, Blackrock, Dublin | Mar 2026 | €772,000 | 160 m |
| 12 Rockford Park, Blackrock, Co Dublinnot full market price | Aug 2025 | €180,000 | 176 m |
| 19 Brookville Park, Blackrock, Co Dublin | Jul 2025 | €886,918 | 179 m |
| 29a Brookville Park, Blackrock, Co Dublinnot full market price | Jan 2025 | €392,000 | 205 m |
| 4 Rowan Park, Blackrock, Dublin | Jun 2025 | €980,000 | 219 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 received17 October 2018
- Decision issued10 December 2018
In the area
Applications near this site
Other planning applications within about 500 m — what else is being proposed or built nearby.
- WithdrawnAt this site
For development consisting of a new porch to front and associated reduction of adjacent window, and infill…
69, Rowanbyrn, Blackrock, Co. Dublin
D05B/0791Dún Laoghaire–RathdownLodged 8 Nov 2005Extension
- GrantedAt this site
Development consisting of retention and completion of alterations to and reconstruction of an existing single…
69, Rowanbyrn, Blackrock, Co. Dublin
D05B/0881Dún Laoghaire–RathdownLodged 6 Dec 2005Retention
- Granted30 m away
Alterations and additions to the existing semi-detached house; including for the construction of a ground…
67, Rowanbyrn, Blackrock, Co. Dublin, A94XW67
D25B/0681/WEBDún Laoghaire–RathdownLodged 7 Dec 2025Extension
- Granted40 m away
New tiled roof above existing flat roof to front, ground floor extension to rear and first floor extension to…
51, Rowanbyrn, Blackrock, Co. Dublin.
D04B/0770Dún Laoghaire–RathdownLodged 22 Oct 2004Extension
- Granted60 m away
Modifications to front and side elevations including relocation of front door from front to side elevation,…
76, Rowanbyrn, Deansgrange,Blackrock, Co. Dublin
D06B/0734Dún Laoghaire–RathdownLodged 10 Aug 2006Alterations
- Invalid60 m away
Installation of a 4.3m x 1.1m x 2.68m (LxWxH) above ground enclosure, to house a new natural gas District…
Lands on the grass area along Grange Ter (R827), adjacent to boundary wall of 76 Rowanbyrn, Deansgrange, Blackrock, Co.Dublin.
D24A/0087Dún Laoghaire–RathdownLodged 16 Feb 2024Infrastructure
- Granted70 m away
Installation of a 4.37m x 1.1m x 2.69m (LxWxH) above ground enclosure, to house a new natural gas District…
Lands on the grass area at Rowanbyrn, Newtown Castlebyrn, adjacent to the boundary wall, along Deansgrange Road (R827)
D25A/0357/WEBDún Laoghaire–RathdownLodged 19 Aug 2025Infrastructure
- Granted70 m away
Demolition of converted garage. Construction of double storey side extension with roof light to end, and…
60, Rowanbyrn, Blackrock, Co. Dublin
D05B/0780Dún Laoghaire–RathdownLodged 4 Nov 2005Extension
Related developments
Similar applications
Ranked by what these developments actually propose, not by matching words — so you can see how comparable applications were decided.
- GrantedExtension
Permission for a single storey extension to the side and rear, also modifications to existing structure,…
30 Obelisk Walk, Saint Augustine's Park, Blackrock, Co Dublin A94 Y4X0
D18B/0334Dún Laoghaire–RathdownLodged 31 Jul 2018
- GrantedExtension
Permission for internal alterations and room re-configuration to existing house, including a new corner…
Elgan House, 7 Woodbrook Downs, Shankill, Co. Dublin A98 D7Y7 (Townland of Aske)
D19B/0374Dún Laoghaire–RathdownLodged 5 Dec 2019
- InvalidExtension
Permission for the reconfiguration of existing house to provide 3 bedrooms and combined bathrooms/WC, single…
4 Seamount Road, Malahide, Co Dublin
F25A/1079FingalLodged 21 Nov 2025
- Part granted, part refusedExtension
Permission for alterations and extensions to house, comprising external insulation, replacement windows,…
44, O'Donnell Gardens (Eden Road Lower), Glasthule, Co Dublin
D13B/0380Dún Laoghaire–RathdownLodged 27 Nov 2013
- GrantedExtension
Permission for — construction of two no. extensions to the existing dwellinghouse, one extension to the rear…
11 Whitestrand Park , Salthill , Galway
18110Galway CityLodged 11 Apr 2018
- GrantedExtension
Permission is sought for single storey extension to side and rear (of 22sq.m approx. consisting of bedroom…
9, Aubrey Park, Shankill, Dublin 18
D11A/0207Dún Laoghaire–RathdownLodged 28 Apr 2011
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