[Varkoll_]

Primary, why you don't use parameter for your "house" variable

PHP код:

if(house > 0) return ShowInfoDialog(playerid, "House - Info", "You already own a house"); 


Have you before assigned a value to the house ?

Have you tried to see if this condition was validated?

PHP код:

if(!strcmp(hInfo[h][hOwner], "None", true)) 


Sorry for my bad english :/