Slum dwellers in Nairobi are shown to pay high rents for low-quality housing - a reality identified by Gulyani and Talukdar (2009). Estimations show around $31mn USD was paid in the form of rents, by poor slum dwellers in Nairobi in 2004. Nevertheless the high-prices did not lead to the materialisation of improved housing. If a landlord can charge high rents in poor housing stock why should he invest in new buildings? Moreover if not done systematically the slum as a whole will never be brought out of poverty rather the poorest areas will simply move around to where those who have not had opportunities are staying.