my understanding for introverted:
not giving the feeling of being open to the exterior; giving the impression of being rather closed-off to the outside

architects’ biggest challenge was to change an introverted and inward-looking layout. into an extroverted concept, in which the building opens outward ...
www.winnipegarts.ca/pub_art_ops/ pdf/Call-To-Artists-Library.pdf

The layout maximizes the public exposure of the first floor to the street while maintaining a more insular and introverted attitude towards the second floor ...
www.arcspace.com/architects/office_da/wab_index.htm

The narrow internal street layout allied to small front gardens gives a. secluded introverted character to the area. Core Blacket Area ...
www.edinburgh.gov.uk/downloads/ caca/cacaBlacket_final.pdf