A psychological study was conducted to explore relationships between extent of home clutter and psychological home (the extent to which a person customises their home so it reflects their self-identity; Sigmon et al., 2002) with psychological variables related to mental well-being. In 2020-2021, a cross-sectional survey was conducted with 501 adults (aged 16 to 92, with a wide spread of household income, with 80% identifying as a woman, and 84% residing in the UK, 42% renting and 54% owning their home) who completed self-report measures of perceived home clutter and psychometric scales of psychological home, mental well-being, perceived stress, positive affect and negative affect, life satisfaction, and a range of potential other variables including demographics, appreciation of beauty, location of survey completion, intention to declutter, time spent at home, and others.