BE20 FLT CREW TAXI ACFT WING INTO HANGAR IN CONFINED TAXI SPACE CAUSING DAMAGE.

Narrative

I WAS CONDUCTING A PART 135 FLT FROM ZZZ TO LAS. THE FLT BEGAN AT XA48 WHEN I BEGAN TAXIING THE ACFT. I WAS PARKED IN THE FAR W CORNER OF THE RAMP (IN FRONT OF FBO X AND RIGHT NEXT TO THE TXWY THAT RUNS ALONG THE NW EDGE OF THE RAMP). I NEEDED TO IMMEDIATELY COMPLETE A 180 DEG R-HAND TURN TO BEGIN MOVING TOWARD THE RWY FOR DEP. WHILE CONDUCTING THE TURN; I NOTICED THAT THE TURN WAS WIDER THAN EXPECTED (THE ACFT DID NOT TURN EASILY EVEN THOUGH I HAD FULL R BRAKE AND RUDDER PEDAL PRESSURE APPLIED AND HIGH L ENG RPM); WHICH RESULTED IN THE ACFT LINING UP L OF THE YELLOW TXWY AS THE WING TIP APPROACHED THE CORNER OF THE HANGAR LOCATED ON THE L SIDE OF THE TXWY (NW SIDE OF THE RAMP); I OBSERVED THE CLOSE PROX OF THE WINGTIP TO THE HANGAR; AND JUDGED THAT I WOULD HAVE ENOUGH CLRNC TO CONTINUE THE TURN AND TO TAXI. AFTER THE WINGTIP TRAVELED PARALLEL TO THE HANGAR WALL FOR 3 - 3 1/2 FT; THE TIP STRUCK THE HANGAR WALL; CAUSING DAMAGE TO THE WINGTIP AND THE STEEL PANELS ON THE HANGAR WALL. I CONTINUED THE TURN TO PARK BACK IN THE SPOT THAT I TAXIED OUT OF; SHUT DOWN THE ENGS; AND DE-BOARDED THE ACFT. THE RESULT WAS PHYSICAL DAMAGE TO THE PLEXIGLAS COVER AROUND THE LIGHTS ON THE WINGTIP; DAMAGE TO THE SHEET METAL CAP ON THE WINGTIP; AND DAMAGE TO THE FIBERGLAS CAP ON THE AILERON. DAMAGE ALSO OCCURRED ON THE STEEL PANELS OF THE HANGAR WALL (HOLES WERE RIPPED INTO THE RIDGES; AND THE PANELING WAS RIPPED BACK AT 3 LOCATIONS). I BELIEVE THIS SITUATION COULD HAVE BEEN AVOIDED BY SOME SIMPLE ACTIONS. FIRST; AFTER THE ACFT WAS TOWED TO THE NEW PARKING LOCATION BY LINE SVC; I SHOULD HAVE TAKEN THE TIME TO BECOME MORE FAMILIAR WITH THE TAXI AREA AND THE EXIT RTES PRIOR TO BOARDING THE ACFT. WHEN I TAXIED INTO THE ARPT; I ORIGINALLY PARKED THE ACFT NEAR THE CTR OF THE RAMP. LINE SVC THEN TOWED THE ACFT CLOSER TO THE FBO; AND INTO THE CORNER OF THE RAMP. THIS WAS MY FIRST FLT INTO ZZZ; AND I SHOULD HAVE REVIEWED THE AREA PRIOR TO TAXI; NOT ASSUMED THAT JUST BECAUSE THERE ARE TAXI LINES PAINTED; THEN ADEQUATE CLRNC IS PROVIDED. I SHOULD HAVE LOOKED FOR ALTERNATE TAXI RTES; RATHER THAN JUST TURN TO THE CLOSEST TXWY. ALSO; I WILL GIVE MYSELF MORE OF A CUSHION ON SPACING WHEN DETERMINING WING CLRNC. IF I HAD NOT ACCEPTED THE MINIMAL CLRNC PRIOR TO THE TIP PASSING THE CORNER OF THE HANGAR; I COULD HAVE SHUT DOWN THE ENGS AND HAD LINE SVC TOW THE ACFT TO A MORE DESIRABLE LOCATION/POS ON THE RAMP.