The site’s 47 car park spaces would be reduced to 23 spaces as part of the work.
Windmill House was sold to MNP Investment Holdings in June last year as one of several West Midlands Police properties deemed “surplus to requirements.”
The planning application said the building had recently been used as accommodation with police trainees transported to and from the force’s main Tally Ho Training Centre in Edgbaston, Birmingham.
The surrounding area is being primed for regeneration with plans including hundreds of new homes and a new school.
A statement included with the application said: “The project seeks to retrofit the existing 1970s utilitarian structure into a high-quality house of multiple occupation (HMO), delivering 76 rooms specifically tailored to the needs of key workers and young professionals.
“Strategically positioned just 500 metres from the Midland Metropolitan Hospital, the scheme is designed to directly support the local healthcare workforce by providing affordable, flexible accommodation in an area identified for regeneration.
“Each bedroom is designed to include an en-suite shower room, pull-down bed with sofa integration, workspace, and built-in storage.
“The existing [building] structure, which comprises a robust concrete frame and cladding system, will be fully retained.”