Orangery cost

Rosa_Damascena

VfM4meplse said:

Davesnave wrote: »

Having said that, we built a conservatory onto our bungalow because a garden room would have messed with the daylight in the living room.

I have been working in my conservatory all day, the rest of the house has been uncomfortably cool but my glass house has been toasty. Now the sun's out, it's time to retreat back inside

I expect this structure to be standing for many years to come.

Well I'm back and planning a double orangery / garden room, complete with deep foundations and the builder is in on the scheme. I'm in the very early stages of planning and have yet to agree the external footprint with the architect, and am looking to complete the project by August 2023 (my 50th birthday). 

It will be L-shaped: half will be a kitchen diner, and the other half will be a large living area that brings the garden to me even when it's uncomfortably chilly outside. What do I need to know before I let my imagination go nuts?