The man was found on Wednesday inside the lock-up garage in Belmont Lane, in the west end of Glasgow.
It is believed he was working as a mechanic although it is not clear if he was self employed or working for a small business.
Police say they are treating the death as unexplained.
However, it is understood that it is not believed to be suspicious and no-one else is being sought in connection with the death.
Health and Safety Executive inspectors have visited the site to gather details.
Inquiries are continuing and a report will be sent to the Procurator Fiscal.