Convert an inner terrace into living space?

Hello everyone,

I am new here in the forum and a prospective homeowner. The house - built in 1960 - has an interior terrace on the ground floor, see floor plan. Here is my idea to move the exterior walls to the actual edge of the house. The terrace can be imagined as a room without walls, the roof is above it. The house itself has a basement, but not the part where the terrace is located. At the corner of the terrace, there is a metal support pillar.

What do you think about this project? I am aware that I need to involve a structural engineer and an architect. But I just wanted to ask if you think such a conversion is realistic and maybe what you roughly think it might cost? At the moment, the two exterior walls have 70% large windows, it should be like that again, I would like to reuse the windows.

Looking forward to your answers
Best regards

Paul

Referring to the "covered outdoor seating area" as an "indoor terrace" probably evokes the association with an atrium not only for me. Structurally, I fear less of a problem here – but you will probably have to upgrade the 24 cm exterior walls (and make further energy standard adjustments).

Hello,
thank you very much for the reply. I have one more question:
Do you mean with „aber die 24er Außenwände wirst Du vermutlich aufrüsten (und weitere energetische Standardanpassungen vornehmen) müssen.“ all exterior walls or the “new” exterior walls?

Regards and thanks

You have to do the new ones, I would do the old ones... Also, I would probably remove the wall between the dining room and the kitchen; both are small rooms that would then create a good whole.

Hello Climbee,
Thank you very much for your reply.
The wall you are talking about, we want to remove. The idea is to create a large room that includes the covered outdoor seating area, the kitchen, the dining room, and the living room.

Inform yourself about your duties as a new owner to adjust the energy standard of the house to the current valid regulations. 24-cm exterior walls from the 60s will almost certainly be affected, even if they are made of pumice, even more so if they are made of solid bricks, and you will also need to plan for something regarding the heating boiler.