Demolition of existing lean-to structure, attached garage and porch to existing single story cottage, Erect new attached garage kitchen extension, rear entrance and sun room front entrance extension at ground floor level. Increase roof level and provide accommodation within new roof space at 1st floor level, Provide proprietary effluent treatment system with raised percolation area and associated works at Drumharlow Td, Carrick on Shannon Co, Roscommon.