A new custody block which could be built at Police Headquarters in Douglas will cost £3 million.
The Department of Home Affairs has submitted a planning application as part of a plan to bring all detention facilities into one location.
It also says the current custody unit, which is 40 years old, has reached the end of its operational life.
If the proposals get the go-ahead building work could start next spring.
Minister Juan Watterson says there are many benefits to the project:
Avoid Fairy Bridge after crash, say police
Man can sue DHSC over respite care PTSD allegations
More EV chargers at Sea Terminal?
Company warns over fake delivery emails
Should dangerous drivers who kill face life in jail?
Police dealing with crash in Colby
Stop falsely accusing youngsters of vandalising skate park!
Plans to make northern school more accessible