Question: I have a first (and only) and self occupied home. Mortgage is fully paid. Home is with four rooms.

Considering expenses I done on home so far including my share in mortgage, taxes so far, total interest paid etc. I will be in profit by 1000000.

Prices of property are not growing considerably anymore; growth rate is minimized.

1. I do not need this much big home. Three rooms should be enough for me.
2. By booking the profit, I can invest the amount (other than my share in new home) in some good investments.
3. New home will be self-occupied as well; it will not be rented.

I can clearly see the benefit, but I am not sure about other financial aspects involved here.

1. New home will start new mortgage.
2. Taxes will not be much different.
3. As new home will be self occupied as well, there is no benefit other than the one gained while selling current home.

Is it advised to sell current self occupied home and buy the other new one to book the profit? If yes, what are the financial loop-holes to be considered while doing this?

I am not doing this for cash as asked [here](https://money.stackexchange.com/q/79211/73868). I am doing this for booking the profit.

Answer: 
No one can answer this but yourself.... 

1) Have you considered closing cost (you'll pay the closing cost for at least 1 property if you sell yours and buy another.

2) Assuming you didn't spend a bunch of money on renovations it would seem that your profit comes mostly from the average home price rising. As such a 3 Bedroom house will also be far more expensive now than when you bought your house. 

3) The cost of moving is not insignificant. You may also end up wanting to replace furniture. Some stuff always breaks during a move. 

4) There are some other costs associated with moving that you may not have considered.

5) You may not end up getting as much money for your current house as you think you should. It also may not sell quickly.

For me personally all that would be too much hassle for what it's worth. But you may see things differently.
There is no *profit* here, and there is no *investment*. It is your home and since everybody pays for the bed they sleep in, it is a cost, not an investment. If the house you are in has gone up in value, then so has the identical house next door and by the same amount, so moving from one to the other would not realize a return on an investment regardless of the change in the book value. 

What you are proposing is a simple downsizing. This will release capital and (probably) reduce your operating costs, but the transaction has some predictable costs involved which will need to be deducted from the capital released. It may seem obvious, but if you can not finance the change without taking on debt, then the change is not worth it.