The terms public interest design and social impact design have been around for a while, but the terminology is still not understood in a self-explanatory way.
Luckily too good glossaries were recently published by Public Interest Design Blog and GOOD magazine. Also American Institute of Architects have included a definition in The Architect’s Handbook of Professional Practice:
"Public Interest Design is the practice of design with the goal that every person should be able to live in a socially, economically and environmentally healthy community.
As in the field of public health, those practicing public interest design take a holistic approach, considering a broad range of social impacts.
As with public interest law, practitioners seek to provide services to the general public, not just those able to pay a fee for services"
Now one just needs to come up with a term in Finnish. Sosiaalinen arkkitehtuuri? Humanitäärinen arkkitehtuuri? Yhteiskunnallinen suunnittelu? Sosiaalisuunnittelu? Huh, that's not going to be an easy task.