[ledzep]

The way you system (as far as I can tell) works right now is that players can only own houses that they have the same ID with.

So a player with ID 0 can only own house ID 0
a player with ID 57 can only own house ID 57
etc...

pawn Code:

Houses[playerid][...]

should be something like:

pawn Code:

Houses[houseid][...]

or if you store the owner variable within the player's stats, it should be something like:

pawn Code:

Player[playerid][houseOwner] // would equal the house ID that playerid owns

But this is merely an assumption.

Post your entire code: www.pastebin.com