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Stackable Interlocked Apartment (Full house upgrades)

The blueprint itself, although fully functional as is, is meant to be HALF of the complex's floor, simply rotate it and there you go, 8 houses per floor, fully connected to the other half.

Here are the specifications:

Proportions: 20x10x4 (If connected to other half, otherwise (10x10x4)

Contents per half: 4 houses, 1 Home Extension, 2 Airtight Insulations

Cost per half floor: 190 Wood, 320 Stone, 21 Minerals

72 people per full floor if second tier houses