🗺️ No drawings of the building anywhere in the office? In Sweden the municipality keeps the drawings from every building permit, and anyone can ask for them. Outside Sweden, ask the local building authority.
Ask the municipality
Search the web for the municipality's name together with "begär ut ritningar" or "bygglovsarkiv". Most municipalities have a web form; the rest take an email to the building committee.
Give the property designation, for example Eken 1:12, and the address. Ask for the latest approved architectural drawings: floor plans, facades and sections.
Ask for them as PDF files, or DWG if the archive has them, rather than photographs of paper.
What to expect
The drawings are public records. You do not need to own the property or sign in to ask.
A small fee may apply for copying. Ask for a quote with the request.
Delivery takes from a day to about a week.
Then
With the drawings in hand, order the 3D model; see Order a 3D model from Vyer. Until it arrives, the building works as Vyer Light with the floors you add yourself.