sun lounge 
noun British
A room with large windows and sometimes a glass roof, designed to allow in a lot of sunlight.The two-bedroom property has recently been refurbished and now includes a living room, kitchen, bathroom, two bedrooms and a sun lounge....
- It has a large sun lounge / dining room, fitted kitchen, sitting room, four bedrooms and a bathroom.
- It was built two years ago and offers 214 square metres of accommodation including a hall, living room, lounge, sun lounge, dining room, kitchen, four bedrooms and a bathroom.