• OSI UOR IDOC system
• Player houses are extendable and have 3 stages. After the initial placement it can be upgraded via the house menu twice. When upgraded, it gets another floor, more secure containers, lockdowns, etc.
• If an upgraded house gets “redeeded”, the deed saves the stage. So when placed again, it appears in the stage it was before it was “redeeded”.
• Some houses can further be upgraded with Modules such as a Stable.
• House deeds and Module deeds are purchased from Architect npc's.
• Some houses have courtyards where runes can be marked which allows owners and co-owners to recall/gate to their courtyard.

• Every account is allowed to have 1 house per default.
• Additional house slots can be bought at the Vault of Eren Vendor.

• All characters on the account of the Owner of a house also have full Owner rights
• No combat restrictions in the house
• Bulletin Boards can be accessed by everyone in public houses (if not banned) or just by friends in private houses
• Everyone can use locked down dice, clocks, runes and VendorRentalContracts
• Friends can add items to a locked down stack
• Friends can use locked down dyes
• Locked down Reward Braziers and other light sources (Base Light) can be used by Co-Owners (switch on/off)
• Only Owners can place Vendors directly (others have to use a VendorRentalContract instead)
• Secureable (in use): Containers, HouseDoors, Runebooks, BoardGames, Books, DyeTub, SpecialDyeTubs, PotionKeg
• Creatures that are not tamed can not enter player houses
• In public houses you can not lock the front doors nor set its security levels. The other doors allow that.
• A house owned by a Guildmaster can have the doors and chests set for Guild Member use. Note: Currently this designation will ONLY allow Guild Members to access, and will not allow any other owner, co-owner or friend to use, unless they are also in the same guild.
• A co-owner can place a personal 25 item capacity storage container in a house by saying “I wish to place a strongbox”.

• If the account has another character, the house ownership will go over to the next character of the account
• If no other character is on the account or the account gets deleted, the house will be “Condemned” and will decay normally. The house sign will indicate that the house is condemned.

• Houses must be placed 5 tiles away from all other player houses. (Some placements have been grandfathered as originally there was only a 1 tile away requirement, except the front door side which had to be 5 tiles away.)
• Uneven terrain and terrain objects like rocks and bushes will block house placement.
• Houses cannot be placed in guard zones, dungeons, anywhere in Adena, or on roads.
• There are several areas where house placement is limited to only members of specific town factions (Westwend and Volaria) who hold a Duke/Duchess title.

• Only the Owner can refresh the decay status of their house.
• House decay status is refreshed by opening and closing any door in the house. (Note: Just logging into your character does not refresh any houses on your account).
• Decay period is 30 days.
• When a house collapses from decay, the house will be deleted and all items within will be dropped to the ground and accessible by anyone.

• Click on self: Leave house (in every house, dead and alive)
• Click on house sign: Vendors (if Vendors are present)

• Click on grey player/visitor: Eject, Ban

• Click on secured item (Container, Keg, etc + HouseDoor): Set Security
• Click on not locked down or secured Containers: Secure this

• If a player vendor is not paid and decays, visit the Lost & Found officer in Moonvale to recover your items. You will have 14 days!

See here