What is the size of the window? Is it an egress window with a scape well? For the basement to be legally called a bedroom it must have a second point of escape.

Your diagram and description are lacking egree (as mentioned) stairs, a bath with shower, cooking facilities - or were you planning on using those features in the upstairs area. Also zoning, permits, insurance need to be taken into account. please examine all facets of your proposal as you plan your space.

Thank you, my window is 39x31 inch .

Your slider isn’t sufficient. Only half of it is accessible. It will have to be replaced, and a window well added.

There are tons more codes involved. And tons more expenses. Setting up separate utilities, a firewall separation, separate at grade entrances, individual parking etc. A hundred thousand job plus needs an architect.

The diagram is not helpful as it relates to the rest of the basement. Is see the sewer line so assume that is where the bathroom is going. How do you reach this basement if you have renters upstairs ?The window is large enough but too small for me for the only source of natural light . We need a to scale drawing that diagram is not to scale use graph paper and show where the bathroom is planned and doorways and how this space relates to the rest of the basement that ia assume will have the rest of the living space like a kitchen, LR ? I agree you better also have got permits for this work.