Affordable housing refers to the housing arranged according to the national affordable housing construction plan. The plan is uniformly issued by the state, and land is generally allocated by administrative means, and land transfer fees are exempted. The approved fees are levied by half, and the sales price is guided by the government, which is determined according to the principle of guaranteed profit.

Compared with commercial housing, affordable housing has three remarkable characteristics: economy, safety and practicality. It is a commercial house with social security nature.