An extension to the rear of the house, approximately 3 x 6 Mtrs. A pitched roof (this could change to a flat roof depending on cost) with Velux type windows. Bi-fold/French doors to the garden also full length windows. A door to the driveway.
I would undertake electrics/flooring/plumbing.

I have attached a photo of the type of extension I would ideally be looking for.