Hi, Myself Pragya.
I have been working as professional Architect and Interior designer for last 5 years.
I am quite handy with Autocad, 3D modelling software like, Sketch up , Revit, Lumion, Sketchup, 3DS Max and Solidworks.
I provide all sorts of architectural services, e.g. Site planning, 2D CAD floor plans using Autocad, elevation, sections, accurate 3D model of the space along with 3D rendering etc.
I have seen the DWG file you have attached for the floor plan. I am an Architect (Not from Kolkata though), and i can help you in designing the elevation, creating section drawing of the house, 3D modeling of the interior and exterior based on the working drawings you have attached and give you realistic rendered view of the house along with video walk through.
Please refer to my portfolio for some of my work.
Warm Regards