Perth's median house price has fallen by $20,000 in the June quarter - the largest drop in two years.

The Real Estate Institute of Western Australia said the metropolitan median house price dropped from $550,000 to $530,000 while the cost of units, apartments, villas and townhouses fell from $440,000 to $420,000. REIWA president David Airey said it was a similar story in the regions with the median house price…