Only did one window at the bottom, real quickie job but is this sorta what you are after? I tried to add a reflection from the sky, all could be tweaked, just trying to see what you are looking for.
IF this is close, this is easy.
Crop out holes where you want new windows. I just went and found a photo of a window off some home improvement site that was roughly the same shape, used the distort transform tool to make it fit the angle of the building, used quick mask to block out each little square window so a reflection could be added. Used the clone tool to add a copy of part of the sky to the window then reduced that layer opacity to let the window glass show. (Hard to tell but I picked a window with rippled glass. Again much room for tweaking.)
View attachment 136568