You are reading a single comment by @ChainBreaker and its replies.
Click here to read the full conversation.
ChainBreaker-
There is no straightforward answer to that question as they are all bespoke....But to give you an idea ours is 7x4.25 meters with a pitched roof of 4 meters high, (semi)soundproofing, partition for toilet, 3.5 meters bifolding doors and 2 extra windows and the DIY kit came at just above 20k....Does not include the slab/foundation and electricity though...If you go for a more common 2.5m high flat roof it brings the cost down significantly.
Aldersbrook
Bought it from these guys http://www.garden2office.co.uk/
They do DIY Kit so going that way to save some money. I look into it for months and they came out the best value for money. The quality of their build is really good (mainly made in Sweden). They have built one of friends garden room already and it was outstanding.
They mostly use plinths too which is absolutely fine in 90% of the case but I was advised against it for my purpose, heavy weight will create vibrations...