COS – Compulsory Open Space definition
COS – Compulsory Open Space means that part of a plot which is to be left completely open to sky, over which no structure or any integral part of the building shall be permitted except permissible projections, basement, steps, septic tanks underground tanks, soak pits, water reservoirs and lines for sewage, water, electricity, gas, telephone etc. or those structures required by civic agencies such as electric sub-station permitted elsewhere in these Regulations.