Site of 2.13 ha at, Blackthorn Avenue, Sandyford Business District, Dublin 18, bounded to the north by Sandyford Office Park; the east by Blackthorn Avenue, the south by Sandyford Park & the Leopardstown Office Park & west by Sandyford Business Centre
Adding an extra floor to five approved blocks in Sandyford, increasing the total floor area.
D20A/0921 · Dun Laoghaire Rathdown County Council · Lodged 25 August 2021
- Reference
- D20A/0921
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 25 August 2021
Summary
AI-generatedPermission is sought to vary a previously approved development by increasing the building height by one floor across all five blocks (A to E). This change will increase the total floor area from 41,871 sq. m to 54,730 sq. m, alongside minor realignments and facade modifications.
- Floor area
- 54,730 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 is sought to vary the previously approved development reg. Ref. D15a/0560. The proposed changes to the previously approved are: (a) building height increased by one floor on all five blocks, a to e, resulting in an increase of floor area from 41,871 sq. M to 54,730 sq. M (b) minor realignment of basement boundary at the south west and south east corners of the site (c) minor realignment of all blocks (d) revised facade treatment on all blocks (e) modifications to hard and soft land...
Land-use zoning
What this land is zoned for
“OE To provide for office and enterprise development.”
National zoning type: Office, business/technology park and related
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.
Recent sales nearby
within 500 m| Address | Date | Price | Distance |
|---|---|---|---|
| 26 Woodford, Brewery Rd, Stillorgan Dublin 18 | Jun 2025 | €870,000 | 107 m |
| 22 Carmanhall Court, Brewery Rd, Sandyford Dublin 18 | Oct 2025 | €566,000 | 207 m |
| 39 Carmanhall Court, Sandyford, Dublin 18 | Aug 2025 | €535,000 | 207 m |
| 37 Woodford, Brewery Road, Stillorgan | Aug 2025 | €750,000 | 209 m |
| 16 Carmanhall Court, Burton Hall Rd, Sandyford | Dec 2025 | €500,000 | 218 m |
| Apt 27 Carmanhall Court, Leopardstown, Dublin 18 | Jul 2025 | €495,000 | 218 m |
| 25 Carmanhall Court, Burton Hall Rd, Sandyford | Oct 2025 | €510,000 | 236 m |
| 26 Carmanhall Court, Carmanhall Road, Sandyford | Mar 2026 | €495,000 | 236 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 received25 August 2021
- Decision issued19 October 2021
In the area
Applications near this site
Other planning applications within about 500 m — what else is being proposed or built nearby.
- GrantedAt this site
Permission for — The demolition of the existing two-storey office/storage building on the site (approximately…
2.13 ha site at Blackthorn Avenue, Sandyford Business Estate, Dublin 18, bounded to the north by Sandyford Office Park; to the east by Blackthorn Avenue; the south by Sandyford Park & Leopartdstown Office Park & to the west by Sandyford Business Centre
D15A/0560Dún Laoghaire–RathdownLodged 4 Aug 2016Commercial
- GrantedAt this site
Permission for amendments to the office development approved under Register Reference D15A/0560, comprising —…
Site at Blackthorn Avenue, Sandyford Business District, Dublin 18; bounded to the north by Sandyford Office Park, to the east by blackthorn Ave., to the south by Sandyford Park & Leopardstown Office Park, to the west by Sandyford Business Centre
D17A/0496Dún Laoghaire–RathdownLodged 5 Oct 2017Commercial
- Granted80 m away
A 10 year permission is sought for development on a site of 2.13ha bounded to the north by Sandyford Office…
Blackthorn Avenue, Sandyford Business District, Dublin 18
D22A/0194Dún Laoghaire–RathdownLodged 3 Feb 2023Commercial
- Granted80 m away
For a 2 storey extension incorporating demolition of existing conservatory and garden shed
27, Woodford, Brewery Road, Stillorgan, Co. Dublin
D04B/0550Dún Laoghaire–RathdownLodged 13 Jul 2004Extension
- Granted100 m away
Permission sought for a change of use from offices to offices for the provision of Financial Services to…
Unit 4, Sandyford Office Park, Sandyford Industrial Estate, Co. Dublin
D07A/0072Dún Laoghaire–RathdownLodged 18 Jan 2007Change of use
- Exempt — no permission needed100 m away
Property upgrade to include conversion of existing commercial office space into accomodation for use under SI…
Oak House, Leopardstown Office Park, Burton Hall Avenue, Sandyford Business Park, Dublin 18, D18HX68
REF13224Dún Laoghaire–RathdownLodged 29 Oct 2024Change of use
- Granted120 m away
Replacement of an existing single sided sign on the front elevation with a new single sided illuminated sign…
Unit 7, Sandyford Office Park, Blackthorn Avenue, Sandyford Industrial Estate, Dublin 18
D06A/0614Dún Laoghaire–RathdownLodged 15 May 2006Change of use
- Granted120 m away
Planning and Retention Permission is sought for; A) Retention of the change of use from office to use as…
Mini India, Sandyford Office Park, 7 Blackthorn Avenue, Sandyford, Dublin 18
D25A/0026/WEBDún Laoghaire–RathdownLodged 13 Jan 2025Retention
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