How can I transfer building privileges on a private island?

[Alwin Alcott]

set it to group owned, or deed it to group

when you are in that group he can set the right permissions to you

[Alwin Alcott]

set it to group owned, or deed it to group

when you are in that group he can set the right permissions to you

[Rolig Loon]

Follow Alwin's advice and have your boss make you a group officer.  That will give you all the abilities you need.