House Size Limit

The House Size Limit is the total number of individuals who are permitted to belong to a House. When a House reaches this limit, they may not give birth to or adopt additional members, but the limit can be increased by improving the House's wealth.

Codex
"Humanity lacks the knowledge to build new colonies or significantly expand existing ones, so there is a limit on how many people can be supported.

This has created enormous social pressure to limit population growth and the excessive consumption of colony resources, notably in particular the One Child Rule.

Nobles also do not escape this scrutiny, and houses limit the amount of their privileged members to avoid causing anger. There is an understood relationship between the wealth a house brings to a colony (either through investment in shared industry, or through trade, plunder, and taxation of external resources) and the leniency others will have to their largesse.

You can see the size that is considered "fair" for your house by focusing on your domain (shown as "Members: X/Y"). Hovering over this value will show the relationship between it and your income."