How much space do small trees need?

While trying to find art/images to convey the aesthetic I envision for the "Sun Room" ...
The principal theme, as I discovered from Reddit `r/worldbuilding`, is "**reclaimed by nature**":
https://www.reddit.com/r/worldbuilding/comments/udy3mi/what_would_the_overgrown_postpostapocalyptic/

BBC Earth has a good intro to the topic:
https://www.bbcearth.com/news/abandoned-places-reclaimed-by-nature
But sadly all the images are `Getty` ... 🙄

Perusing `r/reclaimedbynature`: https://www.reddit.com/r/reclaimedbynature/top/?t=all
The Abandoned village in Shengshan, China looks awesome:
https://www.reddit.com/r/reclaimedbynature/comments/iunydb/abandoned_village_in_shengshan_china/


But don't actually want the "abandoned" keyword ...

This is more like it: https://www.reddit.com/r/reclaimedbynature/comments/idaw09/house_in_vietnam_with_natureloving_owners/

Full:

This is clearly a built-from-scratch house designed with a very specific brief ...

A quick google image search and this is the house in Vietnam:
https://www.archdaily.com/945841/ndt-tlc-home-kien-truc-ndt

Most of the interior is fairly "normal" but the tree growing indoors caught my eye:


From the lounge we can see that they have cut-out a fairly modest amount of the floor to allow the tree access to the soil:
https://www.archdaily.com/945841/ndt-tlc-home-kien-truc-ndt/5f3a4314b35765d2c9000198-ndt-tlc-home-kien-truc-ndt-photo

P.S. I get the feeling I would _really_ like to visit Vietnam ...
https://www.collater.al/en/park-roof-house-mda-architects-vietnam/

Another indoor tree: https://www.archdaily.com.br/br/942052/residencia-vy-anh-khuon-studio/5e99ce73b357653cb1000110-vy-anh-house-khuon-studio-photo?next_project=no