Decluttering’s benefits extend well beyond the aesthetic into the cognitive, psychological, financial, and relational domains that cluttered environments affect in ways the research has documented with increasing specificity. Visual cortex competition from cluttered environments reduces focused attention and produces cognitive fatigue. Higher cortisol levels in individuals describing their homes as cluttered reflect the chronic stress that unresolved environmental signals generate. The financial return of converting unused possessions to resale value, the reduced decision fatigue of a simplified possession environment, and the removal of a recurring domestic conflict source are benefits that make decluttering one of the higher-return home improvement projects available — requiring no budget, producing financial return rather than consuming it, and delivering effects that compound in quality of life terms well beyond the tidier space that initiated the effort.