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Overview
A family in inZOI is a household, a group of up to 8 Zois living under the same roof. Families can be built from scratch in Edit City, formed through marriage, or expanded through pregnancy and new member creation. Managing household composition, roles, and finances is a constant part of gameplay, especially once families grow beyond a couple.
The 8-member cap is a hard limit. When a household reaches maximum capacity, new pregnancies automatically fail. As the developers put it, someone in the family would have to die or move out before a new Zoi can join through birth.
Creating a new family
The most straightforward way to start a family is through Edit City:

Open the Edit City screen (accessible via the map, press [M], or during initial game setup).
Click on any empty house or lot.
Click "Select Family."
Choose a pre-made household from the available presets, or click "Create New Family" to design Zois from scratch using character creation.
When creating a new family, the game enters the character creation screen. Design each family member individually, then assign their relationships to each other before finalizing the household.
Adding members to an existing family
To add a new Zoi to a household that already exists:
Open the Smartphone (press [P]).
Go to City Map [M].
Select the household you want to modify.
Choose "Add Family Member."
Design the new Zoi in the character creation screen.
After creating the new Zoi, click the Relationships button to define their connection to existing household members. Available roles include:
Item | Description |
|---|---|
Roommate | No familial bond. Simply a housemate who shares the space. |
Partner / Husband / Wife | Romantic partner. Sets the Romance relationship to a committed level. |
Father / Mother | Parental role. Establishes a parent-child Family bond. |
Son / Daughter | Child role. Establishes the corresponding parent bond in reverse. |
Roles assigned to existing household members during this process cannot be changed retroactively through this menu. To alter relationships for Zois already in the household, you need to develop them through gameplay interactions or use cheat codes.
Moving Zois between families
To relocate a Zoi from one household to another:

Open Smartphone > City Map > Manage Zois > Manage Family.
Select "Move Zois Between Families."
Choose up to two families from the list.
Select specific Zois to transfer between the families.
Decide how much Meow (household funds) each family keeps after the split.
Surnames are not affected by family changes. A Zoi who moves from the Kim household to the Park household keeps their original surname. The game also provides a Create a Temporary Family option for complex reorganizations. This lets you park Zois in a holding household while you rearrange multiple families, then dissolve the temporary family once everything is sorted.
Household finances
All Meow earned by household members goes into a shared pool. When Zois move between families, the Meow split is manual. The game presents a slider and lets you decide exactly how much money each family gets. There is no automatic even split. Utility bills are charged per household and paid from the shared pool.
Family interactions
Family-specific interactions in Early Access are straightforward. Children can ask parents to cook meals or do laundry. Parents can check on children's homework, help with school tasks, and provide emotional support. Adults in the same household can coordinate chores through cleanliness and home management interactions.

The developers have indicated that cooperative and group family activities will be expanded in future updates. The current system focuses on basic parent-child dynamics and household maintenance.
Family and pregnancy
Pregnancy adds a new Zoi to the household after 3 in-game days. Babies inherit physical characteristics from their parents, including hair color, eye color, and facial structure, along with potentially inheriting traits and skill tendencies. The newborn starts in a crib and ages to Toddler after 1 day. At household capacity (8 members), pregnancy attempts will not succeed.
Children and protection
Children in inZOI cannot die from neglect. If a child's needs become critically low, the Child Protection Agency intervenes and takes the child away instead. Teenagers do not have this protection and can die like any adult Zoi.

Cheat code
The cheat getBabyWith [Zoi ID] triggers an immediate pregnancy with the specified Zoi, bypassing relationship requirements and the normal try-for-baby interaction. The pregnancy still lasts the standard 3 in-game days.