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What are the options to make a warm floor in the basement?

Our house has a gas boiler that feeds the radiators in the basement and underfloor heating on the first and second floors in two heating circuits. I have a converted office room (about 18 m2) in the basement (the basement is 50% underground). A radiator is installed here. The room gets warm, but the floor (tiled) remains quite cold. My question is: Is it possible (or does it make sense) to install a warm floor here? Or are there other ideas for cold floors in the basement? 

• underfloor heating
• warm floor
• basement