From the announcement:
The Mars Construction Company today proudly announces the available of five new standard pattern buildings, Constructed from the standard mix of Martian desert sand and polymer resins, they feature maximum protection from the Martian elements and come with a 50-year erosion guarantee. See the plans and various interior layouts at your local MCC office.
B300-109 – Villa – £2.00
B300-111 – Loading Bay- £2.00
B300-122 – Small Tower #2- £2.00
B300-123 – Twin-dome Buildings – £1.75
B300-124 – Villa – £2.25