First of all, you need to go to the real estate bureau to confirm the right. At this step, the owner must be present, that is, your grandmother must be present with the real estate license, and then you can pay the deed tax. Pay the tax, you take the relevant bills to the real estate bureau and wait for the notice. Your grandmother must be present when the transfer agreement is signed later. Basically, 10- 15 working days will be enough.
In view of your grandmother's age, I suggest you go to the notary office to make an entrustment agreement, that is, your grandmother designates a person to handle all the formalities of house transfer, so that your grandmother only needs to go out once. Because in case you need another run, it's not good to let grandma go out every time.
According to the situation in Beijing, buying and selling a house is more appropriate than giving it away. You can set the house price as the lowest by buying and selling, so the total amount of related expenses paid is also low.