Modern housing in Brussels - areas?

I'd like to buy an apartment in Brussels. After living for several years in typical old houses (with fireplaces, high ceilings, old pipes, holes in window frames, etc), I'm a bit fed up and would like a modern housing (but not brand new not to pay VAT). I'm looking for an apartment of ~80-100 m2 preferably in the east (Montgomery, Woluwe, Etterbeek).

How would you suggest searching for an apartment in a modern building?

I know these are scarce in Brussels but I also have little idea where they are. Shall I only limit myself to immoweb or is it advisable also to drive/walk around the districts, go to real estate agencies, etc? Can I request info about modern districts from the communes? Or perhaps you know areas with modern real estate developments? Thank you!