Can someone fix this script?

You actually didn't test if it was a character that hit the brick. I did a through test run and set up everything, so this script should be working!

owned = script.Parent.Parent.Parent.Owned.Value

script.Parent.Touched:connect(function(hit)
	player = game.Players:GetPlayerFromCharacter(hit.Parent)
    if hit.Parent and game.Players:GetPlayerFromCharacter(hit.Parent) then --You were missing this. Then we proceed to checking if they have the requirements.
		if owned == false and player.Cash.Value >=1000 and player.HasHouse.Value == false then
			player.Cash.Value = player.Cash.Value - 1000
			player.HasHouse.Value = true
			player.PlayerGui.Menu.Frame.House1.Visible = true
			script.Parent.Parent.Parent.Owned.Value = true
			script.Parent.Parent.Parent.OwnedBy.Value = player.Name
			script.Parent.Transparency = 1
			script.Parent.CanCollide = false
		else
		print("Not enough to purchase house.")	
		end
    end
end)

Hopefully this will help you! :) Good luck!