Background: Today, nearly one million people live with dementia (PLWD) in the UK, a number projected to rise to 1.7 million with estimated costs of £90 billion by 2040. 1–4 These projections highlight the necessity to develop cost‐effective solutions to providing care. Multicomponent supportive care approaches (MSCA) integrate tailored support and psychosocial interventions to enable a personalised support package, 5 showing promise in enhancing wellbeing for PLWD and care partners, while offering cost‐effective care solutions. 5, 6 However, these approaches are underutilised due to the additional implementation complexities inherent with multifaceted intervention strategies. The Sage House Model is a MSCA that has overcome these challenges by utilising a collaborative approach between the voluntary and healthcare sectors, integrating a range of specialised dementia services into an accessible community‐based centre. The present study aimed to investigate the wellbeing and economic impact of the Sage House Model of dementia support. Method: A natural experiment was run comparing wellbeing (QoL, Wellbeing, Life Satisfaction) and economic outcomes (Health and Social Care Engagement) between a group of participants with access to the Sage House Model and a group receiving standard care. The sample included 132 PLWD (Mage 74.64, SD 8.30) and 129 care partners (Mage 67.23, SD 9.84). Result: It was observed that PLWD with access to the Sage House Model reported higher QoL (p = .004, ω2 = .06), wellbeing (p = .044, ω2 = .03) and life satisfaction (p = .004, ω2 = .07) as compared to the group receiving standard care. Care partners with access also reported greater needs‐based QoL (p = .005, ω2 = .07) relating to improved access to support and information. It was also observed that participants with access to the Sage House Model cost health and social care less over a three‐month period (p = .038, ω2 = .02) and had greater Health Related QoL (p = .004, ω2 = .03). After incorporating costs associated with funding access, the model continued to demonstrate cost‐effectiveness. Conclusion: Overall, this study provides initial evidence that suggests that the Sage House Model offers a scalable, community‐driven approach to improving dementia care outcomes and supporting PLWD and care partners, while reducing economic strain on health systems.