The average asking price for a home with five or more bedrooms is now £547,500 - up by 23% on a year ago.
Smaller properties have seen much smaller increases in price - just 3% for a four-bed home, and 5% for two bedrooms.
The figures have been produced by a network of independent estate agents.
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Calls for inclusion on Plymouth lord mayor role
It traditionally alternates between Conservative and Labour
Upgrades to Plymouth storm overflows to take place
Hoe bathing waters are priority to stop sewage discharges
Dartmoor finances facing biggest cut for years
'Do DEFRA think the Dartmoor pixie exists?'
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Dartmoor phone mast gets the go-ahead
Better broadband and emergency cover promised
