This paper examines the adjustments made to include people with intellectual disabilities in mainstream services. Drawing on in-depth interviews with both people with intellectual disabilities and mainstream service managers in four urban regions in Australia, the paper points to three modes of practice that are operationalised, to different degrees, when people with intellectual disabilities seek access to mainstream services: a commitment and adjustments to support inclusion of a wide range of marginalised people (diversity and inclusion ethos); adjustments to support inclusion of people with intellectual disabilities more specifically (differentiated adjustments); and, personal support for service users with intellectual disabilities. We argue that these three modes, at the service level, correspond in complex ways with three broader approaches to social inclusion: main-streaming, differentiation and individualisation. Rather than contradictory modes of inclusion, our analysis suggests these approaches should be understood as complementary.