20 Sycamore Lawn, Castleknock, Dublin 15.
First-floor extension with a second floor in the roof space to the side of a detached house.
FW25A/0252E · Fingal County Council · Lodged 13 June 2025
- Reference
- FW25A/0252E
- Authority
- Fingal County Council
- Register status
- Decided
- Type
- Permission
- Received
- 13 June 2025
Summary
AI-generatedThe project involves constructing a first-floor extension with a second floor in the roof space to the side of the existing two-storey detached dwelling. The works include removing the existing side extension roof, adding a new front bay window, and installing new roof lights.
- Storeys
- 3
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 is sought for the construction of a first floor extension with second floor in the roof space to the side of the existing two storey detached dwelling involving the removal of the existing side extension roof, new bay window to the front, new roof lights to the front and rear and all other ancillary site works.
Land-use zoning
What this land is zoned for
“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 planBuilt & 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| Address | Date | Price | Distance |
|---|---|---|---|
| 27 Laverna Dale, Castleknock, Dublin 15 | Apr 2026 | €622,000 | 71 m |
| 33 Sycamore Lawn, Carpenterstown, Dublin | Jan 2025 | €465,000 | 126 m |
| 4 Sycamore Lawns, Castleknock, Dublin 15 | Nov 2025 | €493,000 | 137 m |
| 23 Sycamore Dr, Castleknock, Dublin 15 | Jun 2025 | €545,000 | 149 m |
| 45 Sycamore Ave, Carpenterstown Park, Dublin 15 | Dec 2025 | €515,000 | 151 m |
| 80 Laverna Way, Castleknock Dublin 15, Dublin | Jun 2025 | €710,000 | 164 m |
| 72 Laverna Way, Castleknock, Dublin 15 | Feb 2025 | €672,000 | 173 m |
| 36 Sycamore Ave, Carpenterstown, Castleknock Dublin 15 | Jul 2025 | €999,100 | 180 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 received13 June 2025
- Decision due7 August 2025
- Decision issued5 August 2025
In the area
Applications near this site
Other planning applications within about 500 m — what else is being proposed or built nearby.
- Awaiting decision30 m away
The development will consist of 1.Subdivision of the existing site for the provision of a new two storey…
19, Sycamore Park, Carpenterstown, D15PD0V
FW25A/0481EFingalLodged 11 Nov 2025New dwelling
- Refused40 m away
Permission is sought for the demolition of a rear garden out building and the existing granny flat to the…
19B Sycamore Lawn, Castleknock, Dublin 15, D15DEA4
FW24A/0514EFingalLodged 10 Dec 2024New dwelling
- Refused40 m away
Demolition of a rear garden out building and the existing granny flat to the side of the existing house, with…
19B Sycamore Lawn, Castleknock, Dublin 15, D15DEA4
FW26A/0124EFingalLodged 25 Mar 2026New dwelling
- Granted40 m away
Planning permission is sought for new attic conversion,raising of gable end to change roof profile with…
15 Sycamore Park, Carpenterstown Castleknock, Dublin 15
FW25A/0280EFingalLodged 3 Jul 2025Extension
- Granted80 m away
Permission for retention of minor alterations to previously applied pl
34 Bramley View, Castleknock, Dublin 15
FW18B/0050FingalLodged 27 Apr 2018Retention
- Granted80 m away
For the construction of a ground floor single storey extension (c. 21
24 Laverna Dale, Castleknock, Dublin 15
FW22A/0189FingalLodged 27 Oct 2022Extension
- Granted80 m away
For the construction of a ground floor single storey extension (c. 4.7m.sq.) to the rear of the existing…
24, Laverna Dale, Castleknock, Dublin 15, D15NNH0
FW24A/0176EFingalLodged 24 Apr 2024Extension
- Granted80 m away
Permission for a. Two storey extension to side. b. Single storey exten
34 Bramley View, Castleknock, Dublin 15
FW16B/0129FingalLodged 9 May 2017Extension
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 is sought for the construction of a 2-storey extension to the side of the existing dwelling with…
2, Stradbrook Hall, Stradbrook, Blackrock, Co Dublin, A94A9Y1
D21B/0301Dún Laoghaire–RathdownLodged 11 Aug 2021
- GrantedExtension
Permission is sought for a new single storey extension to the side of the existing detached dwelling with…
36, Ballawley Court, Sandyford, Dublin 16
D17B/0103Dún Laoghaire–RathdownLodged 1 Mar 2017
- Awaiting decisionExtension
Construction of a first floor extension to the side over the existing single storey part of the existing two…
4 The Court , Plunkett Hall Dunboyne , Co. Meath
RA171211MeathLodged 18 Oct 2017
- RefusedExtension
Planning permission is sought for a two storey extension to the front plus a first floor extension to the…
28A, Saint Kevin's Villas, Sallynoggin, Dun Laoghaire, Co. Dublin
D11B/0276Dún Laoghaire–RathdownLodged 17 Aug 2011
- GrantedExtension
Permission for the erection of a single storey extension to a detached two storey dwelling, proposed porch…
Connabury , Castleblayney , Co. Monaghan
19463MonaghanLodged 4 Oct 2019
- GrantedExtension
Permission is sought for a single storey side extension with a flat roof at first floor level, alterations to…
37 Grange Wood, Rathfarnham, Dublin 16, D16 VF84
D21B/0229Dún Laoghaire–RathdownLodged 11 May 2021
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