Get an achitect before you even start this project just because you havemasonary walls does not mean you can add a second storey.

planning of building first floor of my 10 year old home , confused about construction of bathroom attached bedrooms considering size and ground floor plan constraints

give me some suggestions on planning a building ,revit ..

Hello there, You need to consult with a local architect first for the layout and plan approval. They will provide you with floor plan and furniture layout, 3D elevations etc. Also, they would send them for approvals. What you're asking for is a paid professional service. Please consult locally first. Else, if you need anything specific, please feel free to connect with us. Also, your budget is too tight for 800 sqft unless it is an open plan. Cost of construction starts from 1100-2000/ sqft depending on materials and contractor. Usually that will cover design and approvals costing as well. Regards, Aurum Ideas and Spaces Bhubaneswar