The land invasion in Mary Thipe Road, Cato Crest, started this past weekend after an announcement that land was available there.
Residents in Manor Gardens said they felt let down by the government and now feared for their lives and properties.
As people cleared plots yesterday, a few started building structures.
At least three structures made of wood and plastic had gone up by mid-morning. Putting up structures could make it difficult for the municipality to remove the land occupiers.