Would you classify this as an extension or an orangery/conservatory?

[Cherryblossom200]

Hi,

I'm in the process of putting an extension on the back of my house. Similar to the picture below.

I was thinking today I wonder if I could get the same effect with a conservatory with brick walls and glass and save myself about £20k.

I'm not sure what would be best?

Thanks to anyone who replies 😊

@SpidersAreShitheads did you go ahead with vita modular in the end and if so what do you think?