Your question depends, if it is a building or a house and are there Utilities and Electrical and Meters
in the basement. One can have access but does not mean one has to be given a key.
A lot depends on the contract for lease, is it spelled out?
AND HE/SHE HAS NO SUPER THAT LEAVES THERE, I THINK HE SHOULD HAVE ONE TENANT THAT HE TRUST TO HAVE A COPY OF THE KEY IN CASE OF EMERGENCY. OTHERWISE HE /SHE WILL HAVE TO BE AVAILABLE WHENEVER THERE IS A NEED FOR ACCESS TO THE BASEMENT.
building, is your electric box down there. not sure what your asking or why so we can possibly help you
otherwise you can call the department of housing.