Flatbread because Council/HA tenancies are not like private rental. They are secure tenancies which means that they have the right to treat the house as their home for as long as they live there.
I have a Council tenancy. I have lived here almost one year. Once my tenancy becomes secure next month, I have the right to live here until I die. I have the right to improve the property. That means that (as long as I inform and have permission from the council, which cannot reasonably be refused) I can:
Extend the property
Add a conservatory
Have a loft conversion
Change the internal layout of the house
Change the kitchen, bathroom, etc.
Add or remove features
The only proviso is that the council can ask us to revert it to its original state prior to ending the tenancy. Having said that, they would only do that if someone trashed the house.
Not only that, but if I choose to do those things, then for each improvement, the council will pay me up to £3000 per improvement.