Court tombs are a northern thing here. There are only four south of Dublin. The majority are in the north (i.e. Northern Ireland) and the NW (Mayo, Sligo & Donegal). The east coast below Dundalk is devoid of them as is much of central Ireland. The strays are oddly scattered in Clare, Waterford, Tipperary and Kilkenny.
The only tomb type found all over Ireland is the wedge tomb. Portal tombs cover the same region as court tombs plus the east coast, but are far fewer in number (180 vs 400 or so)
That date you give would place the tomb around the same age as the mid-age Irish court tombs, which are supposed to range from around 6000bce to 3000bce ish.