Estimation is the scientific way of working out the approximate cost of an Engineering Project before the execution of the work. The project deals with the plan and estimation of a residential building. Since planning, drawing, estimation of any building structure by a manual method using pencil, sheets, etc. takes more time and also there is the possibility of having mistaken while calculation. With advanced technology, we can reduce the time used for drawing and calculation and also human error. The principal objective of this project is to Plan and Estimate Residential Building (G+1) structure. Microsoft Excel helped us by giving accurate measurements for estimation and AutoCAD helped us in drawing accurate measurements for the planning of the proposed building plan. With the help of Microsoft Excel and Auto CAD we successfully found the estimated area of Plot area = 252.84 m 2, Ground floor area = 124.24 m 2, First-floor area = 107.92 m 2, Total floor area = 232.16 m 2, F.S.I Permitted = 1.0, F.S.I consumed = 0.92 & let; 1.0.