Third sector organizations have always played a significant role in the supply of home support services in Quebec, but this supply of services attained a crucial development phase in 1996, with the creation of 100 or so domestic help social economy enterprises (DHSEEs). These DHSEEs complemented the supply of public services delivered by the Quebec state, thus de facto taking part in the dynamics of co-production of services in the context of a mixed economy including the third sector. However, beyond that co-production, these enterprises also have to position themselves in a process of co-construction with the state, that is, in the joint, partnership-oriented construction of public policy, which provides the framework for their participation in services of public interest. Analysis of this public policy thus shows that the situation of DHSEEs in Quebec has swung, depending on the period, between co-production and various types of co-construction. A number of restrictive budget policies and subcontracting practices adopted by the Quebec state, along with tensions among DHSEE groups, curtailed the development of a genuine co-construction process during the 2000s.