Hi Starlite,
Being in real estate, I have come across a few houses that have areas similar to conservatories - these are rooms tacked onto (generally) the front of the house and the upper parts are covered in large glass panes on (generally) three sides. All this, though, is old construction - can't say I've ever seen anything that is less than 20 or so years old in this vein.
Regards, George.