The most expensive housing in Yongzhou is typically found in the city center and in areas with high demand for amenities and proximity to key infrastructure. These areas include the downtown district, near major commercial centers, and in neighborhoods with access to quality schools and healthcare facilities.

The reason for the higher housing costs in these areas is multifaceted. Firstly, the city center benefits from a concentration of commercial and cultural activities, which attract residents and investors alike. This demand for prime real estate locations drives up prices. Additionally, the central areas often have better infrastructure, such as transportation networks and utilities, which are crucial for residents' daily needs and contribute to the overall value of the properties.

Data from the Yongzhou Real Estate Association indicates that the average price per square meter in the city center is approximately 10,000 RMB, which is significantly higher than the city's average of around 6,000 RMB. This discrepancy underscores the premium placed on housing in the most desirable locations. Furthermore, a report by the National Bureau of Statistics shows that the city's housing prices have been increasing at an annual rate of about 5% over the past five years, reflecting the ongoing trend of rising real estate values in Yongzhou.

The presence of reputable schools and healthcare facilities also plays a significant role in determining housing costs. Areas with access to high-quality educational institutions and medical services tend to attract families and professionals, thus driving up property prices. For instance, the housing market in neighborhoods surrounding top-performing schools often sees higher prices due to the perceived value of a good education for children.

Moreover, the development of new commercial and residential projects in the city center has contributed to the rise in housing costs. These projects, which often include mixed-use developments with a combination of retail, office, and residential spaces, have increased the attractiveness of these areas, further boosting property values.

In conclusion, the most expensive housing in Yongzhou is concentrated in the city center and areas with high demand for amenities and infrastructure. The factors driving these high prices include the concentration of commercial and cultural activities, the presence of quality schools and healthcare facilities, and the development of new mixed-use projects. Data from local real estate associations and the National Bureau of Statistics supports the trend of rising housing costs in these prime locations.