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Renting a room in the UK has become more expensive year-on-year with the average cost now hovering at just below £600 a month.

But it's not all doom and gloom for renters with some cities bucking the trend with double-digit declines in room rates.

London remains the most expensive place to rent at £783 a month while Cambridge and Oxford are also amongst some of the most expensive at £613 and £588 respectively, both seeing some of the largest quarter to quarter increases at 8-9%.

Leading room share platform, ideal flatmate, released it’s Room Rental Index for the second quarter of 2019, looking at the cost of renting a room across the UK’s major cities.

Experts crunched the numbers from more than 29,000 room share listings on its site added between April and June and found that in the second quarter of this year, the average cost of renting a room in the UK has increased by 8%, now at £577 per month.

Liverpool has also seen prices increase 8% on the previous quarter, although at £473 per month, it remains far more affordable.

There has also been notable growth across Sheffield, Newcastle, Leicester, Birmingham and Nottingham since Q1.

Where rent has gone down

However, not everywhere has seen the price of a room increase with both Bournemouth (-13%) and Portsmouth (-10%) seeing a double-digit decline.

Having seen strong growth in Q1, Glasgow has seen room rental costs decline by -6% quarter to quarter. Southampton, Leeds, Bristol and Plymouth have also seen the cost of renting a room reduce.

In London, Barking and Dagenham remains the most affordable borough for a room rental at £561, with the City of London the least affordable at £1,140.

Havering, Sutton, Harrow, Camden and the City of London have seen the smallest growth in rental costs at 2%, while Lewisham and Kingston have seen the average room rental increase by 10% since Q1.

Co-founder of ideal flatmate, Tom Gatzen, commented: “A large degree of rental price growth in the second quarter of this year is almost certainly attributed to the introduction of the tenant fee ban.

"While a positive step towards safeguarding tenants, its implementation has seen many landlords and letting agents opt to increase rents from June onwards which seems to have had a notable impact on rental costs in a short period of time.

"However, this hasn’t been the case everywhere and in the room rental space as opposed to the rental market as a whole, seasonal influences can have a big impact on the advertised price.

"The highest demand for room rentals tends to come at the start of the year or the start of the summer and traditionally this brings a lull in demand during the second quarter of the year.

"As a result, we often see prices drop along with demand and this is generally most prominent in coastal and university towns."

No let-up for London room sharers though, as prices continue to increase across the capital with the average cost of a room now some £40 higher on average a month than it was at the start of the year.”