Newtonbarry House is approximately 100km from Dublin.
There are two major routes:
Follow the N11/M11 through Ferns, and a few miles further on, turn right at the roundabout, and take the N80 to Bunclody.
Alternatively, take the N7/M7/M9 towards Waterford. Leave the M9 at the Carlow/Wexford/Rosslare exit, taking the left turn on the N80 towards Bunclody. Descend the hill into the village, past the shops to the crossroads, and turn left across the River Slaney. The entrance is immediately on your left.