What is a walk-in attic called?

A walk-in attic is commonly called a floored attic, finished attic, storage attic, or walk-up attic, depending on its condition and use. If it has finished walls, flooring, and ceiling and is used as living space, it is often called finished attic, bonus room, or attic bedroom. If it is unfinished but has flooring and enough headroom to walk in for storage, it is called storage attic or floored attic. Architecturally, a walk-in attic with full staircase access is called walk-up attic, while one accessed by pull-down ladder is called scuttle attic even if you can walk once inside. In real estate listings, walk-in attic may be called stand-up attic or walk-in storage attic. If attic has been converted to living space with insulation, windows, and HVAC, it may be called attic conversion or loft, particularly in British English where loft is common term. So terminology varies, but walk-in attic generally means attic with enough height and flooring to walk upright, often referred to as floored or finished attic.