Casa Candonga also offers a self-contained apartment with its own private entrance from Calle del Horno. This upper apartment provides 70 m² of living space arranged over two floors. Access is from this street, leading directly into the 28 m² attic living area, which features a fully equipped kitchen and an open-plan living and dining room designed to accommodate up to four guests.

The attic includes a motorised roof window with electric opening, operated by a wall-mounted switch positioned out of children's reach. It allows the space to be naturally ventilated and helps maintain a comfortable indoor temperature during the warmer months. Beneath the window, a cosy Berber-inspired chill-out corner has been created, offering direct views of the keep of Frías Castle. It is the perfect spot to relax and enjoy the stars on warm summer evenings.

A staircase leads down to the floor below, where a landing gives access to two 12 m² double bedrooms with high vaulted ceilings. Each bedroom features its own en-suite bathroom, providing both comfort and privacy for guests.