The analysis by property firm Savills finds that the introduction of the standardised methodology, which increases the assessed housing requirement across the country by more than 70,000 homes a year, will "inevitably" lead to a reduction in the number of local authorities where there is a demonstrable five-year housing land supply.
According to Savills’ analysis, 181 authorities would not have their land supply status affected by the changes.
But, the analysis finds, of the 241 local authorities that can currently demonstrate a supply of over five years’ worth of sites for new homes, 97 would no longer be able to do so, using the need figures generated by the standard methodology.
These authorities are heavily concentrated in London and the Home Counties, according to Savills’ analysis.
The analysis also finds that, of the 83 authorities that cannot currently demonstrate a five-year supply, 42 - mainly to be found in the Midlands and North of England - would gain a five-year supply as a result of the standard method.