Average rent in Karlovy Vary ranges from CZK 221/m² for large flats (4 or more rooms) to CZK 319/m² for studio flats and small flats (1+kk/1+1). In absolute terms, this corresponds to monthly rent of approximately CZK 11,500 for a small flat, CZK 15,000 for a two-room flat, CZK 18,800 for a three-room flat and CZK 17,600 for larger flats.
Source: Ministry of Finance of the Czech Republic rent price maps for flats, available at https://www.mfcr.cz/cs/rozpoctova-politika/podpora-projektoveho-rizeni/cenova-mapa, Karlovy Vary locality.