Accessory-Dwelling Units (ADUs) are one form of the built-environment in which the field of public health law can intervene to improve population aging. Modifying the built-environment to incorporate ADUs allows older adults to utilize a higher level of smart home technologies (SHT) to age-in-community. Under Massachusetts law MGL c. 40A, the state gives authority to cities and towns to adopt ordinances and bylaws to regulate the use of land, buildings and structures. A mixed-methods research design was used to examine the access and utilization of ADU and SHT among older adults. Of the 351 Massachusetts town and cities, 66.5% were categorized as having accessible ADU zoning bylaws. Educational attainment and housing density were significant predictor variables of ADU score in a regression analysis. The qualitative study sample (N=35) perceived ADU and SHT as strong alternatives to long-term care, but remained concerned about the financial and care planning aspects of aging well.