A garden room is a secondary area in your outdoor space, usually with walls or structures that compartmentalize spaces like fences, flowers, or vines. It differs from a patio because of the physical separation from the house and rest of the garden.
It's an appealing and cost-effective solution to add more living space to your home. You can make your own with something as simple as a hedgerow, or go big and get the assistance of an architect to create a striking outbuilding, which is likely cheaper than an extension on your house, and may not require planning permission (provided that you don't want to sleep inside the garden room).
Add to the appeal of this secluded space in your garden with outdoor accessories and decor elements. An outdoor sofa, along with a couple of armchairs, is a smart idea to provide enough seating to accommodate a large group of friends. Make sure to embellish the space with pillows and rugs to personalize the space even more. As you would in an indoor living room. Ideally, you should have enough storage space to stash away all fabric decor elements if it suddenly starts raining. If the solution you choose has no roof, consider adding an umbrella so that your guests stay cool under the sun.