I didn't notice the leather @Neryl Hollingsworth! It's a chair-table hybrid it seems. My friend took this at a gallery some where, and we've been trying to track the piece down ever since!

The design is called Chesterfield, very common. Where are you based as i know of a Place in Dandenong Melbourne

always good to please your husband and you'll have a better chance of achieving a good result together....cost will depend too much on the reality of the site to guestimate...we always begin by consulting a builder to check the existing building to see what's possible structurally, check with Council to see what's legal and then you'll need formal plans drawn up so you can collect quotes but i'd be inclined to ask about the whole project as you may have a better chance of attracting an experienced custom builder for a bigger job than just the small extension (even if you negotiate to have the work done in stages ...best of luck

If you are wanting the window the same size as the French doors, then a window manufacturer would do the whole job. Do you want aluminium or wooden windows? they will manufacture the window to fit space. Are your walls brick or timber studs? do you want a window which is smaller than French doors? These answers will determine whether you need a brickie a carpenter or just a window manufacturer.