Hi Vivek, I don't know any architect in Panchkula. If you don't have any problem, I can do the renovation. I am Delhi based and Delhi is also not very far from Panchkula. U can contact me on the above mentioned contact no.

I disagree with the advice above, the bathroom door that is in the passage should be closed. The reason for this is that you already have a bedroom without an attached bathroom. If you go by the advice above you will then have two bedrooms without an attached bathroom. Its not ideal. Also, you havent told us for which uses are the other two bedrooms. Are there going to be old parents in the bedroom with the bathroom or kids or are you going to use this as a guest bedroom? If you close the door in the passage you can have a bigger vanity by moving the WC behind the door that is from the bedroom side. This is also good because you should never have a bathroom door with a view of the WC. The WC is a very private spot and there shouldnt be a direct view of it from the room. Also we tend to spend more time sitting on the potty than washing hands, looking at ourselves or taking a bath. Once you move the WC you can have the vanity extending till the wall and will be 2.5x bigger than what you currently have.

Old house renovation at Anand

No, afaik there is no feature like this in Houzz app. It might look easy, but it might be unfair to ask multiple designers to put in their efforts to design for free when it's not even a professional competition. There might be some people who might just take these multiple customised designs for free and choose to walk away.  Instead, as a suggestion you can have a look at designers profile and portfolio here and engage with them according to your convenience and taste.