Rising UK house prices: 31 is the average age for buying a first home, and it rarely happens without parental support. Sarah Spickernell is an Online Writer at City A.M. She can be contacted at sarah.spickernell@cityam.com. The average age for Britons to buy their first homes is now 31, up from 28 in 1995 according to Halifax figures. Over the last 20 years properties have mostly trebled in value from around £61,500 to £196,000, and they are predicted to go up another 25 per cent over he next five years due to high demand.