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 29 August 2025

• Project completion expected in Q4 2025.
• R149 junction works progressing with ESB and Watermain infrastructure and connections to be completed.
• Road pavement surfacing nearing completion.
• Landscaping works ongoing.

​​​Key Construction Activity Milestones

• Barnwell Roundabout and Barnwell Road junction (schools’ junction) works completed.
• 2 no. of toucan crossings commissioned North and South of Barnwell Roundabout.
• New temporary traffic signal layout commissioned at Barnwell Road junction (schools’ junction).

Current and Immediate Upcoming Works 

Updated 29 August 2025

Three Month Look Ahead:

• Complete tie-ins to the existing road network at the R149 junction.
• Complete landscaping, road markings and signage on the Southern half of the project.
• Commissioning of watermain, traffic signals and public lighting on the Southern half of the project.
• Complete road pavement surfacing on the Southern half of the project.

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.