The median advertised room in a shared house in Cardiff is £600 a month, and half of all rooms sit between £550 and £650. Measured from 25 live listings on 2026-08-09. No official statistics track what a room costs, so we do.
Sharing saves about £297 a month against the official average one-bed in Cardiff (£897, ONS) before bills, so roughly £3,564 a year.
Bills change the picture. The median all-in room (bills included) is £600, against £598 plus bills for the rest. Compare the true monthly total, not the headline rent: gas, electricity, water, broadband and council tax on top of a bare rent usually cost £80 to £150 a month per person.
84% of rooms accept students. Most of the market is open to you, so don't settle for a bad room.
The middle option. Studios here run about £850 a month: between a £600 room and a £897 one-bed, for a front door of your own.
Paste the listing into the free student rent check and get a verdict for that exact address: whether the rent is fair for the street, how far it is from campus, and the area basics nobody puts in the advert.