Rental supply from lodger landlords who rent out rooms in their own homes makes up a quarter of all supply in the flat share market, but is now in decline.
Seasonal trends are providing limited respite in parts of the country, but longer-term challenges remain unresolved, according to newly released data from Propertymark.
Room rents in Wales rose nearly three times more than the average room rent for the whole of the UK over the past year, fuelled by a 5% year-on-year rent increase in Cardiff.