Across the nation, housing costs are rising quickly. The S&P Core, Logic Case-Shiller National House Price NSA Index, which tracks cost changes of single-family homes, indicates that in November 2020, housing costs had risen 9. 5 percent from the previous November. At the end of 2019, the average house deserved around $245,000. It's now worth more than $266,000, according to Zillow. This is a huge increase, and there are a few factors behind it. The rate of a home is tied to the supply…