Rent in Monmouthshire rose 4% over the past year, new figures show.
Propertymark, a membership organisation for estate agents, warned "there remains an unhealthy imbalance" between rental supply and demand.
Provisional figures from the Office for National Statistics show the average private rent in Monmouthshire reached £980 per month in the year to November – up 4% from £940 a year prior.
It was also up 46% from an estimated £671 a month five years ago.
Rent Officers Wales, which is part of the Housing and Regeneration Division of the Government, collects prices from landlords and letting agents, with the aim to collect data for approximately 15% of the market.
Across Wales, the average rent was £820 – rising 6% from the year before.
Cardiff had the highest rental cost in the country at £1,147 per month, while the lowest was in Powys at £596.
In November, the average private rent in Great Britain was £1,377 per month. This was £57, or 4%, higher than 12 months ago.
Nathan Emerson, chief executive of Propertymark, said: "Though it might be disappointing for many to see that rents on average have increased overall, it is encouraging to see that through 2025, we have witnessed rental inflation trending downwards.
"There remains an unhealthy imbalance between rental supply and demand, however, which continues to contribute to rental prices edging upwards.
"It has been positive to see attention focused on ensuring higher standards and greater consumer protection for those who choose to rent during the year; however, it also remains fundamentally important that investment is encouraged to keep pace with ever-growing demand, as the population continues to expand."
The figures also show the different costs for various homes in Monmouthshire, from £720 for a one-bed property to £1,483 for a home with four or more bedrooms in November.
Among the property types in the area:
- A detached housed cost £1,286 to rent per month
- A semi-detached cost £1,010 per month
- A terraced house was £945 per month
- And a flat or maisonette was £817 a month
