Sidney Webb House, a 446-bed student hall of residence in Great Dover Street, has been sold by its owners Places for People to a Bahrain-based investment fund for £23.3 million.
The Shariah-compliant AUB UK Student Accommodation Fund has bought the seven-storey building which is let to the London School of Economics on a 30-year lease.
The fund is run by Ahli United Bank which is based in Bahrain.
This week Standard & Poor's downgraded AUB's credit rating because of the political turmoil in the Middle East.
"We believe that the medium-term outlook for the economic and operating environment for Bahraini banks has weakened, which could have negative implications for their creditworthiness," S&P said in a press release.
"Our actions on AUB take into account our view that Bahraini banks' business and funding profiles are exposed, albeit to varying degrees, to the current turmoil."
For the latest local news and events direct to your inbox every Monday, you need our weekly email newsletter SE1 Direct.