Basic terraforming station, currently terraforming planets and moons in Sol in my game.
TS class Terraforming Station 50,711 tons 210 Crew 1,097.1 BP TCS 1,014 TH 0 EM 0
1 km/s No Armour Shields 0-0 HTK 28 Sensors 0/0/0/0 DCR 1 PPV 0
MSP 13 Max Repair 500 MSP
Lieutenant Commander Control Rating 1 BRG
Intended Deployment Time: 3 months
Terraformer: 2 modules producing 0.0012 atm per annum
This design is classed as a Commercial Vessel for maintenance purposes
This design is classed as a Space Station for construction purposes
There is no reason to have habitat module just tick No Armour in Class Design and you can build it with factories. Dont forget, that bigger platform needs stronger tug to move. I use groups of ten.