Dormer delight at Ar mBaile
At the risk of finding crude reasons for refined results, it is partly because the lack of sewage treatment facilities has capped development in the hinterland. This means most new builds are one-offs, and on large enough sites to take septic tanks or bio-cycle treatment plants.
Because the area is considered a bit of a property hot-spot, it has high property values, so to secure their investment people spend a bit more on house design.