This kind of exterior design can be common to all types of houses. There are also houses with bifold patio doors. See some examples here at https://www.compareglazingprices.co.uk/double-glazed-patio-doors/
Draught-free homes are also comfortable at lower temperatures – so you’ll be able to turn down your thermostat. We have a step-by-step guide to draught proofing for extra help.
How about double glazed doors – here is a cost guide
Family homes can benefit from a new bathroom, conservatory or new doors & windows – see some door prices & types