Ongar Barnhill Road

The Ongar to Barnhill Road will be constructed south of Ongar and will provide improved access to Barnhill LAP (Local Area Plan) lands, where circa 1200 new homes will be built in the coming years.

The 1.9kms of road will include the construction of a new bridge over the Clonsilla-M3 Parkway rail spur, 1km of dual carriageway road embankment, 0.9km of single carriageway, 2 new crossroads with traffic lights and 3 new roundabouts.

Contractor BAM Civil Ltd are carrying out this work on behalf of Fingal County Council with a projected completion date in late 2025.

Progress Updates

Update 27 June 2025

• Project completion expected in Q3 2025.
• Barnwell Roundabout upgrade nearing completion with improvements to footpaths and cycleways.
• Bituminous surfacing is progressing.
• Landscaping and boundary work is progressing.
• R149 junction works progressing with expected completion during Q3 2025.

​​​Key Construction Activity Milestones

• Public Lighting installation has commenced.
• Traffic signal installation has commenced.          
• Barberstown Lane South tie-in completed. 

Current and Immediate Upcoming Works 

Updated 27 June 2025

Three Month Look Ahead:

• Complete road pavement surfacing.
• Complete tie-ins to remaining existing road networks at Barnwell Rd and the R149 junction.
• Complete landscaping, road markings and signage.
• Complete commissioning of site utilities, traffic signals and public lighting.

Providing Sustainable Transport into the Future

The Ongar to Barnhill Road will provide a route for walking, cycling and travel by road. 

The route will not only link the two local areas together for better access to schools, homes, amenities and shopping. It will also link to the Royal Canal Greenway and to the Damastown Clonsilla Cycle Route, forming an important part of the Greater Dublin Area (GDA) Cycle Network.