The first large and at the same time the most important work of Skibniewska was the project of Sady Zoliborskie (1958-72) - a settlement considered one of the best residential complexes in post-war Poland, which was realized by working in Warsaw Housing Cooperative. It was designed by taking into account the possibilities of adapting the living space to the varied and changing needs of tenants. Skibniewska believed that the people living in her buildings cannot be treated as passive recipients. She thought that personalized, environmentally-friendly surroundings made it easier to get attached to the habitant, and therefore the habitant will like and care for it. Moreover, as many modernist architects believed that the well-designed and approved living environment, in which they live, could play an educational role, positively influencing their social attitudes and self-management.
In opposition of domination of the "fast" construction as a result of the housing crisis, Skibniewska strove to realize a vision of humanistic architecture focusing on man. She was the architectcof the first apartments in Poland carefully adapted to the needs of people with disabilities located here in Sady Zoliborskie. She also designed an environmental school in the 1970s for the same neighborhood, not only for educational purposes, but also as a daycare and educational center.