Sunrooms
The full answer: an enclosed room with toughened Low-E glazing, single or double glazed.
Ideas
Most outdoor areas are used for a few summer months. Getting real winter use takes three things together: a roof, shelter from wind at seated height, and light after dark.

The full answer: an enclosed room with toughened Low-E glazing, single or double glazed.
Windproof side blinds turn a covered deck into a sheltered space on cold, breezy days.
Built-in LED lighting and a roof that closes flat in rain keep the area usable after dark.
Not sure about consent? Check the building consent guide for your council →