A scramble by buyers to complete before the stamp duty holiday started winding down pushed UK house prices to a record high in June, official figures show.
Across the UK, the average house price in June was a record £266,000.
It was an increase from £255,000 in May and beat the former record, which was set in March, by £10,000.
“In June, UK house prices saw their highest annual growth since 2004,” said ONS head of prices Mike Hardie.
“This figure, however, was boosted by large monthly growth, with a rush to complete purchases before changes to the stamp duty holiday came into effect at the end of June.
“The average price of UK houses now stands at a record £266,000, which is £31,000 higher than this time last year.”
Prices increased the fastest in Wales over the year. The 16.7% rise there pushed the average price to £195,000, the ONS said.
For the seventh month running London was the region with the lowest annual growth, at just 6.3%.
Last July the Government said it would suspend the tax that buyers pay when purchasing a new home through part of the Covid-19 crisis.
In England this meant that buyers would not have to pay any stamp duty on properties worth up to £500,000. In Scotland and Wales the threshold was half that amount.
“These changes in the tax paid on housing transactions may have allowed sellers to request higher prices as the buyers’ overall costs are reduced,” the ONS said.
The stamp duty holiday was originally meant to come to an end on March 31, pushing prices up to a then record high that month.
But the Chancellor extended that deadline to June 30 to avoid a cliff-edge which could have scuppered many transactions.
The stamp duty holiday was then tapered out by decreasing the threshold to £250,000 in England until the end of September.
Yet in Scotland prices in June still pushed to a record high despite the stamp duty holiday ending there in March.
George Franks, co-founder of estate agents Radstock Property, said: “The exceptional price growth in Scotland, where the stamp duty holiday ended on March 31, highlights how property transactions have been driven more by lifestyle changes than stamp duty savings.
“The pandemic has changed everything, with more people working remotely, and that is reflected in the level of annual price growth seen north of the border.
“In many respects, the stamp duty savings have been a sideshow to the much bigger narrative of people wanting entirely different things from their homes.”
PwC economist Jamie Durham said: “There is an ongoing shift in preferences towards more spacious properties, affecting the mix of what is being purchased and pushing up average prices.
“Household savings have increased significantly for many during the pandemic, enabling buyers to put more towards their deposit and increasing the price they can afford.”
Jeremy Leaf, a north London estate agent and a former residential chairman of the Royal Institution of Chartered Surveyors, said: “This most comprehensive of all the housing market surveys confirms the rush to beat the beginning of the stamp duty taper, which we were seeing in our offices up to the end of June.
“However, the report is a little dated so it doesn’t show that the predicted price correction immediately afterwards failed to materialise.
“There are fewer but more serious inquiries now with most potential buyers displaying a steely determination to proceed, with existing transactions rarely renegotiated or failing to complete.”