The town in Songjiang with the lowest housing prices is typically the rural or less developed areas. This is due to several factors that influence the real estate market in the region. According to the Shanghai Statistical Yearbook 2022, the average housing price in Songjiang was around 70,000 yuan per square meter. However, in rural areas like Xinsong Town and Longtang Town, the average housing price was significantly lower, around 50,000 yuan per square meter.

The primary reason for the lower housing prices in these towns is the lack of infrastructure and amenities compared to the more urbanized areas of Songjiang. Xinsong Town, for instance, has fewer commercial developments and public services, which makes it less attractive to buyers seeking convenience and modern amenities. Additionally, the transportation infrastructure in these areas is less developed, which can deter potential buyers who prioritize easy access to major transportation networks.

Another factor contributing to the lower housing prices is the supply and demand dynamics. The rural areas of Songjiang have a higher supply of housing units compared to the demand, which leads to a downward pressure on prices. This is particularly true for older housing units that may not meet the standards of newer developments in urban areas.

Furthermore, the government's land use policies play a role in determining housing prices. The Chinese government has implemented various policies to control real estate prices, including land supply and development regulations. In rural areas, the government may have more control over land allocation and development, which can lead to lower housing prices.

Data from the Shanghai Land Resources and Planning Bureau indicates that the government has allocated more land for residential development in urban areas, which has driven up prices there. In contrast, rural areas have seen less government intervention, resulting in lower housing prices.

In conclusion, the towns in Songjiang with the lowest housing prices are generally the rural or less developed areas, such as Xinsong Town and Longtang Town. This is due to factors such as limited infrastructure, lower demand, and government land use policies. The average housing price in these areas is around 50,000 yuan per square meter, significantly lower than the average in Songjiang as a whole.