I WAS SLOWING DOWN TO PERFORM THREE-POINT TURN TO PARK IN GARAGE. SLOWLY (<5MPH) APPROACHING END OF FIRST ARC, I PRESSED THE BRAKES TO STOP. IT WAS SNOWING AND SLIPPERY, AND THERE WAS A SLIGHT SKID OF VEHICLE. I PRESSED HARDER ON BRAKES TO STOP, WHICH RESULTED IN REVVING OF THE ENGINE AND CRASH OF VEHICLE INTO WALL/GARAGE SUPPORT. I LOOKED DOWN TO CONFIRM MY FOOT WAS ONLY CONTACTING THE BRAKE PEDAL. I PLACED THE VEHICLE IN PARK TO COMPREHEND WHAT HAD JUST OCCURRED. I PLACED THE VEHICLE IN REVERSE TO COMPLETE 2ND ARC OF THREE-POINT TURN, AND COMPLETED PARKING IN THE GARAGE.