Does a granny annexe add value? In most cases, a granny annexe will add a significant chunk to the value of your property. ... Granny annexes offer multi-functional living spaces that can make a property more appealing to buyers, whether they're used as extra living space, an office, a home gym or a holiday rental space.

Do I have to pay council tax on an annexe?

An annexe will be exempt (which means you don't have to pay Council Tax) if it is separately banded for Council Tax but forms part of another property and a dependant relative is living in it as their main or only home.

Is a granny annex a good idea?

An annex is a good option if you have an elderly relative who needs extra care but doesn't want to go into a care home, as it allows them to still have their independence but also be close to the family, should they need some help.