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It's hard to find such a house, and now the street is directly made into a façade. Unless the neighborhood is far from the city, or is an old house.
I advise you to buy a store directly, and buy a house directly above the store, so that if you need to expand the store, you can save a sum, and if you don't want to expand your business for the time being, you can also live upstairs.
Obviously an illegal building! Because from what you say, it's not a temporary structure built downstairs, it's a long-term one. He has significantly changed the original structure and façade of the building! >>>More
It is better to find a professional maintenance worker to solve the problem.
You stop the water for him and see what he says? Find a property.
The terrace is not covered, and the sliding door cannot be done, because the sliding door is not insulated, and it will be very cold in winter.
That wall can't be a load-bearing wall, you can change it when you decorate. There are so many good things in the building.