Zoopla - the second biggest UK online property site after Rightmove - will pay up to £190m for uSwitch.
It said the combination of the two businesses would give consumers the ability to research, find and manage their homes on a single platform.
USwitch, which was founded in 2000, is majority-owned by LDC, a division of Lloyds Banking Group.
Both sites will continue to trade under their separate brands.
Read the full BBC News article here