The tiny-house movement is an architectural and social movement that advocates living simply in small homes. There are different definitions of "tiny". The 2018 International Residential Code, Appendix Q Tiny Houses, defines a tiny house as a dwelling unit with a maximum of 37 square metres (400 sq ft) of floor area, excluding lofts. There are a variety of reasons for living in a tiny house. Many people who enter this lifestyle rethink what they value in life and decide to put more effort into strengthening their communities, healing the environment, spending time with their families, or saving money. Tiny homes can also provide affordable, transitional housing for those who have experienced a lack of shelter.