The distraction burglaries took place between January 9 and 20.
Police said they believe the incidents are linked and are reminding people to be vigilant and look out for elderly family members and neighbours.
The offenders used similar distraction techniques in each of the burglaries – posing as staff from the water board, they told their victims there was an issue with the water and to go and turn their taps on.
Once distracted the crooks have gone in and taken cash, jewellery and other expensive items.
If anyone receives a knock on the door from people claiming to be from the police, council, a utility company or any other organisation always ask to see identification.
If anyone sees anything suspicious or have been visited by doorstep callers who they do not believe to be genuine, they should contact police as they may have important information. In an emergency dial 999.
For more information on how to keep your home secure or for support an advice if you or some you know has been affected this crime search burglary on the website west-midlands.police.uk