New home prices fell in Houston and Austin in January, while moving up in Dallas-Fort Worth and San Antonio, a new report showed. Across the four markets, new homes sold for an average of $349,025 across in January, up from $347,798 in December, according to the New Homes Sales Index. The index tracks a 12-month rolling average for new homes listed in the local Multiple Listing Services of the state’s four largest metro areas.