Aganazzar's Adequate A-Frame

You conjure a sturdy cottage or lodge, roughly 20 ft. square, made of a material that is common in the area where the spell is cast. The floor is level, clean, and dry, with rude furnishings—eight bunks, a trestle table, eight stools, and a writing desk. In all respects the lodging resembles a normal cottage, with a sturdy door, two shuttered windows and a small fireplace; the cottage lasts for the duration.

The shelter has no heating or cooling source other than natural insulation qualities, but does provide considerable security otherwise—regardless of its material, the structure behaves as if made of stone in regards to damage and ignition.