I believe this rule might have been broken by Doombringer, though I'm unsure:
4.14 Purchasing Properties - You may only claim multiple rooms/buildings if you have enough people basing with you to make it worthwhile the owner of the house is the one that owns the front door. When taking over a district you must have one person in each house before blocking the district off.
Because the compound is the district, right? If he didn't block of the district or have someone in each building then you're right.