Bonus room

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Bathrooms, technical rooms, laundry rooms or storage rooms/wardrobes do not typically satisfy requirements for permanent residence according to building codes Secondary rooms.png
Bathrooms, technical rooms, laundry rooms or storage rooms/wardrobes do not typically satisfy requirements for permanent residence according to building codes

A bonus room, flex room, multiuse room or spare room (though the latter often means an extra bedroom) is a room created by remodeling or adding an addition that does not meet local building code definitions for traditional rooms, or is designed for multiple possible uses. For example, codes will typically require that a bedroom have a window and a certain number of electrical outlets. Such a room might actually be intended for sleeping, but will be described as a "bonus room" in rental and sales listings.

Contents

Etymology

The term bonus room is mainly used in the United States. One early use is from The New York Times in 1991, which wrote that "A recent solution to the problem of noisy teen-agers is the enticingly titled bonus room, which is a spare room on the bedroom floor that can be used as a den, television room or guest room." [1] [2]

Modern evolution

The concept of a bonus room has evolved significantly in recent years. Initially, bonus rooms were used to address noise or activity clashes in open floor plans, such as providing space for teenagers’ music or family entertainment. More recently, the term has become a popular architectural design trend. One article notes that while bonus rooms were originally found on the bedroom floor, they are now frequently built over garages, in attics, or in basements. [3]


References

  1. A House Is a Home, but It's Something Else, Too. Witold Rybczynski. The New York Times. November 24, 1991
  2. The Bonus Room: A “Hot Button” in Architectural Design. Rexy Legaspi. 8 October 2015
  3. Legaspi, Rexy (June 15, 2023). "Why a Bonus Room May Make Sense for Your Next Home". The Plan Collection. Retrieved September 22, 2025.