Annual house price growth hit 9.8% last month as the market “defied expectations” in 2021 – but growth is likely to slow considerably in the coming year, Halifax said.
The increase was the biggest since July 2007, according to the lender, as prices rose month-on-month by 1.1%.
It is the latest confirmation of a buoyant housing market in 2021 as a lack of homes for sale combined with historically low mortgage rates drove prices higher.
But interest rate hikes and wider cost of living increases could put the brakes on the surge.
Halifax said the average price for a property now stands at £276,091, an increase of more than £24,500 on December 2020 – the biggest in cash terms since March 2003.
Quarter-on-quarter growth of 3.5% was again the strongest since 2006, the lender said.
Halifax said Wales was the strongest region for house price growth, with a rise of 14.5% to an average £205,579.
Greater London saw the slowest growth, of 2.1%, though average prices of £525,351 in the capital were still well ahead of other parts of the country.
“The housing market defied expectations in 2021,” said Halifax managing director Russell Galley.
“In 2021 we saw the average house price reach new record highs on eight occasions, despite the UK being subject to ‘lockdown’ for much of the first six months of the year.”
Mr Galley pointed to the lack of spending opportunities created by COVID restrictions helped to boost households’ cash reserves.
“This factor, alongside the stamp duty holiday and the race for space as a result of homeworking, will have encouraged buyers to bring forward home purchases that may have been planned for this year,” he added.
Meanwhile, government support for jobs and incomes during the crisis “may have given some households the confidence to proceed with purchases”.
“Looking ahead, the prospect that interest rates may rise further this year to tackle rising inflation, and increasing pressures on household budgets, suggests house price growth will slow considerably,” Mr Galley said.
“However, there are many variables which could push house prices either way, depending on how the pandemic continues to impact the economic environment.”
The figures come after another index from lender Nationwide recorded house price growth at 10.4%, making it the strongest calendar year since 2006.