New Development - Exclusive 4 Bed Homes available. Size: c.1,760 sq.ft (164 sq.m) BER Rate A3. Register your interest now with Doran Estates (01) 465 9777 Colmkille’s Mews is a new development, it comprises of 4 beautifully designed A3 Rated 4 bedroom homes. The development is located in a quiet leafy cul-de-sac at the foothills of the Dublin Mountains in Ballycullen. Colmkille’s Mews is undoubtedly a much sought after location.