How many square meters is your house? Do you have a large area around it? You can expand the house if necessary, if there is space. I actually built an extension to my house, but for this you need to ask permission from the local council. Quality Built Co built the second floor for me, of course it took more than a month, but honestly I am very happy with the result, it even turned out to be more profitable than buying a new house and moving, so you can think about this option. As for the planning of the house, they also do it, you can contact them through the website and they will advise you.