I love the option to work in a private office while still feeling connected to the larger open plan space. And who doesn't want a huge blackboard to creatively brainstorm?

Linda the image above uses a pediment type of scenario, and creates a recessed gable, however with one side of your home having a parapet and the other, a floating gable without a soffits, I think it wouldn't work. I think the strapping i showed yours easiest and most effective as it won't look like fixing an error. As for no shingles, they are my first pick, but very particular and you lean either way, I'm for them, but only real ones, not the fc product ones which have wrong proportions all round. I could only suggest using a batten arrangement in the same way as your gable, otherwise the lining boards look best. These can be sheets, so fixing would be easy. It would tie in with your porch roof being lining boards too. The main thing for me is that window awning, put architraves to the exterior of that window frame, paint it the dark blue colour, to conceal the white window, that's why I suggested white timber details, to make sense of this error.

our old home had timber ceilings and some walls so we used full height off white curtains, white and very pale grey painted sections of wall and the floors were light coloured "marble" look vinyl tiles..(had the vinyl floor tiles for many years and loved it so much we laid them in our new home)..also loved the look of our timber but over time it darkens and does "suck the light" so you could either paint some walls or ceilings or replace with painted plastereboard (opportunity to add modern insulation?) and the vinyl floors in light colours and shiny surfaces will definately help to reflect light and looks good for ever

I like the triangular pattern and stag head, however the teal does not seem to blend in well with the dining chair covers. You could try matching the ochre colour in the triangles in the plain cushions.