Not looking for an exact figure!
A house I am quite interested in has planning permission for a single storey extension and conversion of garage to bedroom and ensuite.
I'm not interested in having this work done so it has no value to me. But I wondered how much this may have added to the asking price 🤷♀️ it's mentioned as a main feature. The current asking price seems way too high to me, over 50% higher than house in the same street a year ago.