This work reviews and analyses design options used to assess the feasibility of a Ground Source Heat Pump (GSHP) to supply heating to twelve flats. Incentives for communal heating and renewable energy are examined, as are grants and schemes provided to assist uptake of GSHP systems. Four elements of GSHP system design are evaluated: heating load, pump size, borehole array and heat delivery system. The aim is to determine optimal design by minimising energy demand, land use, material use and project costs, whilst maximising system efficiency. Peak Load calculations and various borehole options are analysed using software simulations. Energy demand is evaluated for pumps and heating delivery systems using calculated methods, and literature review. Minimising materials and equipment, whilst maximising system efficiency is analysed by comparing design options.