When I bought this house in 2019, it had a concrete patio with an aluminum roof off the north side of the house.  The original owner framed it in and used it for storage and a place to build cabinets.  Here's a view of the back NW corner of our house... It leaked and the footings for the walls were not to the building code.  I used it as my hitting bay when COVID hit.  But I wanted a permanent leak-proof, heated and A/C room.  Very hard to find contractors this last summer; I had one