Mezzanine

A mezzanine is an intermediate floor between the main floors of a building, typically not counted as a full story. It is often smaller in height than a standard floor and may be open to the level below or occupy only a portion of the floor area. The term derives from the Italian mezzanino, meaning “little middle.”

In architectural practice, mezzanines are used to add usable space without constructing a full additional level. They can be located between any two main floors and may be partially enclosed or fully open. Structural support usually comes from walls or a steel framework, and access is provided by stairs or lifts. Mezzanines must comply with fire safety, egress requirements, and load-bearing specifications.

Mezzanines have wide application. In commercial buildings, they create extra office space, storage, or display areas in shops and showrooms, often allowing a higher ceiling in the lower floor. In theatres and cinemas, the mezzanine refers to a seating tier between the orchestra and balcony. In residential settings, mezzanines appear in lofts or duplexes as a partial upper level, frequently used for sleeping or working spaces.

In industrial and warehouse settings, mezzanines are common for increasing storage or production areas. They are typically constructed from steel or metal decking and require careful planning for access, fire protection, and load distribution.

The term also appears in finance, where mezzanine financing denotes a hybrid form of capital that sits between senior debt and equity, often subordinated and convertible, used to fund growth or acquisitions.