Develop an Android App in which House's Floor plan can be made

I want to build an Android app in which anyone can create Floor Plans or so we say the Blueprints of the house or floor. The app will have the functionality, by which anyone can drag and drop the rooms and objects in it by selecting the room type (like kitchen, hall, bedroom, garage) from the list to create a floor plan and export it to jpeg or pdf. I have googled some of the samples and these all are the outputs of the app i am looking for someone who can build such editor/functionality in the app and can give similar outputs and just displaying a 3D view of the plan prepared on webpage and no editing or configurations on web just display. I have attached some images please refer through this and let me know if interested. The Development cost can be discussed. PS: The app prototype is already made but this functionality has to be added. Message me for more details.