Renovation and extension of two-storey dwelling with new septic tank

Permission for the development which will consist of: renovation and extension works to existing 2 storey dwelling on our lands, namely (a) removal / demolition of structurally unsound roof and rear side walls, including first floor joists, and reconstruction of same in extended area to rear of primary dwelling structure, (b) demolish structurally unsound single storey rear/side extension and replace with new single storey rear/side extension off primary dwelling structure, with roof lights, (c) rebuild porch structure complete, (d) provision of new PIA Approved Septic Tank c/w distribution chamber and percolation area, and all associated site works such as laneway resurfacing, replacing fencing, provision of surface water soak pits, gravel driveway c/w natural stone entrance piers at existing property entrance at