Police in Wyke have set up a “Cold Calling Control Zone” following reports of bogus callers operating in the area.
The zone covers Ashley Road, Sellerdale Drive, Aysgarth Close, Mistral Close and part of Westfield Lane and was officially launched this week, following work with partners at Bradford Council and West Yorkshire Trading Standards.
Residents have been given leaflets explaining details of how the scheme works, as well as stickers to display on their windows and doors.
Signs have also been displayed on lampposts to warn cold callers they are not welcome.
There are more than 200 Cold Calling Control Zones in West Yorkshire and research shows that reports of this activity tend to drop in areas where these zones have been set up.
PC Andrew Hood, neighbourhood ward officer for Wyke, said "Cold calling can be very intimidating, particularly for vulnerable members of the community. This zone will help protect them from illegal traders or bogus officials."