Flat share site SpareRoom undertook research to see which postcode districts in the country have seen the steepest room rent increases since before the COVID-19 pandemic. The LL18 postcode (Rhyl) topped the list, with an average monthly room rent increase of £380 in the second quarter of 2019, to £682 in the second quarter of 2025. In Wales as a whole, the average room rent is £592 per month, up from £407 in 2019 (increase of 46 per cent). Rhyl’s postcode district has the fifth-highest demand in Wales for room rents, meanwhile. “With the average room rent now not far off £700 a month, many renters will have already been priced out of living in Rhyl.