Well starting from bottom 1. Escavation work- Length , Breadth and depth of escavation is to be noted and then multiplied to the rate of escavation. 2. Primary base- I assume you would use boulders or broken bricks for stabling the surface by compacting them. So you would have to note down depth of boulders , width of escation boulders to be placed , and length then you would have to calculate the volume and multiply the volume with cost. 3. Mortar over boulder- you would be placing low strength cheap mixed mortar over the boulders for perfectly levelld sufrace so again depth of mortar, length and width. Calculate the volume after which you would calculate quantity of cement and fine aggregate multiply it with cost. 4. Brickwork- for this you would need the thickness of wall , length and height. Calculate no of bricks and multiply the cost( Dont forget to deduct the 1 cm mortar thickness between bricks while calculating brickwork for wall ). 5. Mortar for wall- Its easy to find just substract 1cm from each dimension and then substract entire quantity from brickwork calculated before. Once you have the quantity use can find cement and aggregate volume based on ratio and multiply individual volume to its rate to get the cost. 6. Plaster- Assuming you would go for plaster you have to do same thing as mortar. 7. Paint- Calculate total are and multiply by its rate. So in total you Should have following tables on your estimate serial no , particulars/Work, Length ,Width, Depth/Height, Rate ,Total , Remarks. Ps. You will have to add workcharge establishment, TnP , Contractors profit etc but i assume you already know about it and will do it yourself