Garden Office (all year round use)

[timetex]

When we move, we're looking at adding a garden office, along the lines of:

http://www.thegardenoffice.co.uk/

or

https://the-green-room.co.uk

It'll be large enough for 2+ to work comfortably in (probably at least 5m x 4m) and because it is more than just a shed (built with SIPS panels etc.) it should be great to work in all year round, with minimal heating requirements. Electrical connection, obviously, with sufficient sockets, and I'll probably even get a full ethernet connection pulled down to it as well so internet access will be reliable. Finally, will also connect it to the non-mains drainage (biodisk) and inbound water supply so it can be plumbed for toilet / sink.

Anyone any experiences of either company, or alternatives? Or suggest something different?

[timetex]

Thanks for the input.

I'm not sure something brick / block built would end up that much cheaper, would it? It would also still have to be under a certain height to make sure no planning was required. I've not checked to see if a block / brick built building would still need planning.

We'd also like to avoid major foundation work.

Also wanted to avoid something too much like a shed or log cabin. Did consider things like an old Airstream, or a Shepherd's Hut but although these are perhaps a little unimaginative, at least they are fit for purpose as that's what they were designed for!

Will look into it further....