Please can you share more details on the garden office construction? How long did it take? How much did it cost? Is it worth it? Which builders did you use?
It’s absolutely worth it in my opinion. WRT the cost, I think different area will cost differently, so it’s better to ask your builder. We went with an independent builder. It was built tgt with all the other works in the house so hard to say how long it took. But I would say it probably needs 6-8 weeks for a job like that? Depends on your finishing etc