Therefore, structures for extreme environments have to be designed for:

Structural adequacy: Safe and reliable yet optimized structures in terms of structural material use.
Material properties: Stable mechanical properties like high strength, ductility, durability, stiffness, tear and puncture resistance.
Maintenance: Minimum maintenance requirements.
Compatibility: With all sub-systems, e.g. life support.
Transportation / ease of erection: Minimum mass and volume, easy to assemble.
Excavation / Foundations: Minimize requirements.
Functionality: Low habitat volume to floor area ratios increase efficiency.
Local materials: Long-term goal to use as much indigenous material as possible.