It would not work. The plumbing needed for residential vs. commercial needs is problematic. Structural integrity could be compromised.

>Het Nationaal Archief in Den Haag lijkt me een goede plek om te beginnen. Op de site onder "onderzoek", "hulp bij uw onderzoek" kun je al gericht zoeken onder "Tweede Wereldoorlog", "Militairen en Marinepersoneel" etc.
>
>Je kunt ook in levenden lijve archiefstukken inzien zie site onder: "onderzoeken", "plan uw bezoek".
>
>(nationaalarchief.nl/onderzoeken)
>
>Anders heeft de lokale bibliotheek of gemeente van bijv. Rotterdam misschien ook wat archieven over destijds die je op aanvraag in kunt zien.

Translation 4 Ya:The National Archives in The Hague seems like a good place to start. On the site under "research", "help with your research" you can already search specifically under "World War II", "Military and Navy personnel" etc.
You can also view archive documents in person, see site under: "research", "plan your visit".
(nationaalarchief.nl/onderzoeken)
Otherwise, the local library or municipality of Rotterdam, for example, may also have some archives about that time that you can view on request.

I have a set of 120-year-old books in a large zip-lock bag with some desiccant in it...thanks for reminding me to recharge the desiccant. They've been there for 20 years still in great shape.