The traditional Swedish cottage is a simple panelled house made by wood and painted in red. They may contain 1–3 small bedrooms and also a small bathroom. In the combined kitchen and living room ("storstuga") there is usually a fireplace. Today, many cottages have been extended with "outdoor rooms" (semi-heated external rooms with glass walls and a thin roof) and large wood terraces. As a result of the friggebod reform in 1979, many cottage owners have built additional guesthouses on their lots.