Auckland's median house price has risen a record 26 per cent to $755,000 over the past year, amid signs that supply shortages and surging prices in the city may be prompting buyers to look elsewhere.

The number of houses sold nationwide increased 29 per cent to 7,426 in June compared with the same month a year earlier, according to the Real Estate Institute of New Zealand. Excluding Auckland, sales jumped 35 per cent. The national median price increased 5.4 per cent to $450,000 in June…